/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:41:16,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:41:16,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:41:16,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:41:16,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:41:16,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:41:16,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:41:16,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 15:41:16,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:41:16,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:41:16,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:41:16,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:41:16,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:41:16,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:41:16,355 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:41:16,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:41:16,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:41:16,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:41:16,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:41:16,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:41:16,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:41:16,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:41:16,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:41:16,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:41:16,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:41:16,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:41:16,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:41:16,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:41:16,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:41:16,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:41:16,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:41:16,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:41:16,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:41:16,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:41:16,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:41:16,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:41:16,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:41:16,359 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:41:16,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:41:16,359 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:41:16,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:41:16,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:41:16,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:41:16,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:41:16,610 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:41:16,612 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:41:16,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl [2021-06-05 15:41:16,613 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl' [2021-06-05 15:41:16,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:41:16,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:41:16,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:41:16,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:41:16,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:41:16,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:41:16,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:41:16,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:41:16,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:41:16,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... [2021-06-05 15:41:16,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:41:16,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:41:16,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:41:16,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:41:16,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:41:16,754 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:41:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:41:16,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:41:16,755 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:41:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:41:16,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:41:16,755 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:41:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:41:16,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:41:16,756 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:41:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:41:16,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:41:16,757 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:41:16,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:41:16,970 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:41:16,971 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:41:16 BoogieIcfgContainer [2021-06-05 15:41:16,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:41:16,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:41:16,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:41:16,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:41:16,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:41:16" (1/2) ... [2021-06-05 15:41:16,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d73060 and model type queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:41:16, skipping insertion in model container [2021-06-05 15:41:16,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:41:16" (2/2) ... [2021-06-05 15:41:16,976 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3.wvr.bpl [2021-06-05 15:41:16,979 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:41:16,979 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:41:16,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:41:16,980 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:41:17,045 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:41:17,062 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:41:17,074 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:41:17,074 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:41:17,074 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:41:17,074 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:41:17,074 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:41:17,074 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:41:17,074 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:41:17,074 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:41:17,080 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 38 transitions, 100 flow [2021-06-05 15:41:17,110 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 661 states, 659 states have (on average 2.9650986342943852) internal successors, (1954), 660 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 661 states, 659 states have (on average 2.9650986342943852) internal successors, (1954), 660 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:41:17,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:17,127 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:17,127 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash -460395558, now seen corresponding path program 1 times [2021-06-05 15:41:17,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:17,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961412537] [2021-06-05 15:41:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:17,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961412537] [2021-06-05 15:41:17,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961412537] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:17,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:17,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:41:17,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669917921] [2021-06-05 15:41:17,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:41:17,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:17,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:41:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:17,229 INFO L87 Difference]: Start difference. First operand has 661 states, 659 states have (on average 2.9650986342943852) internal successors, (1954), 660 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:17,259 INFO L93 Difference]: Finished difference Result 732 states and 2170 transitions. [2021-06-05 15:41:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:41:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:41:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:17,274 INFO L225 Difference]: With dead ends: 732 [2021-06-05 15:41:17,274 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 15:41:17,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 15:41:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-06-05 15:41:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.9685362517099865) internal successors, (2170), 731 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2170 transitions. [2021-06-05 15:41:17,371 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2170 transitions. Word has length 21 [2021-06-05 15:41:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:17,372 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 2170 transitions. [2021-06-05 15:41:17,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2170 transitions. [2021-06-05 15:41:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:41:17,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:17,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:17,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:41:17,379 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1781646153, now seen corresponding path program 1 times [2021-06-05 15:41:17,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:17,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360801867] [2021-06-05 15:41:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:17,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:17,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360801867] [2021-06-05 15:41:17,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360801867] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:17,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:17,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:41:17,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885500306] [2021-06-05 15:41:17,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:41:17,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:17,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:41:17,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:17,448 INFO L87 Difference]: Start difference. First operand 732 states and 2170 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:17,458 INFO L93 Difference]: Finished difference Result 851 states and 2466 transitions. [2021-06-05 15:41:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:41:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:41:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:17,462 INFO L225 Difference]: With dead ends: 851 [2021-06-05 15:41:17,462 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 15:41:17,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 15:41:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2021-06-05 15:41:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.91796875) internal successors, (2241), 768 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2241 transitions. [2021-06-05 15:41:17,500 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2241 transitions. Word has length 25 [2021-06-05 15:41:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:17,501 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2241 transitions. [2021-06-05 15:41:17,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2241 transitions. [2021-06-05 15:41:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:41:17,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:17,503 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:17,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:41:17,504 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -510940709, now seen corresponding path program 1 times [2021-06-05 15:41:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:17,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819358508] [2021-06-05 15:41:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:17,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:17,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819358508] [2021-06-05 15:41:17,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819358508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:17,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335973164] [2021-06-05 15:41:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:41:17,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:17,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335973164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:17,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:17,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 15:41:17,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787302843] [2021-06-05 15:41:17,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:41:17,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:41:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:41:17,869 INFO L87 Difference]: Start difference. First operand 769 states and 2241 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:18,079 INFO L93 Difference]: Finished difference Result 1791 states and 5134 transitions. [2021-06-05 15:41:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:41:18,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:41:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:18,089 INFO L225 Difference]: With dead ends: 1791 [2021-06-05 15:41:18,090 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 15:41:18,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:41:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 15:41:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1087. [2021-06-05 15:41:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.8683241252302025) internal successors, (3115), 1086 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3115 transitions. [2021-06-05 15:41:18,117 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3115 transitions. Word has length 30 [2021-06-05 15:41:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:18,117 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3115 transitions. [2021-06-05 15:41:18,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3115 transitions. [2021-06-05 15:41:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:41:18,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:18,120 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:18,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:41:18,333 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1019541771, now seen corresponding path program 2 times [2021-06-05 15:41:18,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:18,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913999113] [2021-06-05 15:41:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:18,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:18,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913999113] [2021-06-05 15:41:18,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913999113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:18,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533875071] [2021-06-05 15:41:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:18,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:18,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:18,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:41:18,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533875071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:18,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:18,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:41:18,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142096938] [2021-06-05 15:41:18,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:41:18,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:41:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:41:18,630 INFO L87 Difference]: Start difference. First operand 1087 states and 3115 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) [2021-06-05 15:41:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:18,870 INFO L93 Difference]: Finished difference Result 2154 states and 6168 transitions. [2021-06-05 15:41:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:41:18,870 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 30 [2021-06-05 15:41:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:18,877 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 15:41:18,877 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 15:41:18,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:41:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 15:41:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1130. [2021-06-05 15:41:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.906997342781222) internal successors, (3282), 1129 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3282 transitions. [2021-06-05 15:41:18,903 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3282 transitions. Word has length 30 [2021-06-05 15:41:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:18,903 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3282 transitions. [2021-06-05 15:41:18,903 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) [2021-06-05 15:41:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3282 transitions. [2021-06-05 15:41:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:41:18,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:18,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:19,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:19,123 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash 527270829, now seen corresponding path program 3 times [2021-06-05 15:41:19,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:19,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301797342] [2021-06-05 15:41:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:19,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:19,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301797342] [2021-06-05 15:41:19,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301797342] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:19,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:19,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:41:19,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758298986] [2021-06-05 15:41:19,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:41:19,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:41:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:19,147 INFO L87 Difference]: Start difference. First operand 1130 states and 3282 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:19,156 INFO L93 Difference]: Finished difference Result 999 states and 2818 transitions. [2021-06-05 15:41:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:41:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:41:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:19,160 INFO L225 Difference]: With dead ends: 999 [2021-06-05 15:41:19,160 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 15:41:19,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:41:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 15:41:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 999. [2021-06-05 15:41:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 2.823647294589178) internal successors, (2818), 998 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2818 transitions. [2021-06-05 15:41:19,177 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2818 transitions. Word has length 30 [2021-06-05 15:41:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:19,177 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 2818 transitions. [2021-06-05 15:41:19,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2818 transitions. [2021-06-05 15:41:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:41:19,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:19,180 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:19,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:41:19,180 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1610214649, now seen corresponding path program 4 times [2021-06-05 15:41:19,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:19,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664459944] [2021-06-05 15:41:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:19,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664459944] [2021-06-05 15:41:19,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664459944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:19,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402031725] [2021-06-05 15:41:19,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:19,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:19,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:41:19,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:19,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402031725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:19,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:19,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 15:41:19,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819376981] [2021-06-05 15:41:19,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:41:19,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:19,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:41:19,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:41:19,432 INFO L87 Difference]: Start difference. First operand 999 states and 2818 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) [2021-06-05 15:41:19,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:19,643 INFO L93 Difference]: Finished difference Result 1442 states and 4013 transitions. [2021-06-05 15:41:19,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:41:19,644 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 30 [2021-06-05 15:41:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:19,648 INFO L225 Difference]: With dead ends: 1442 [2021-06-05 15:41:19,648 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 15:41:19,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:41:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 15:41:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 975. [2021-06-05 15:41:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.8213552361396306) internal successors, (2748), 974 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2748 transitions. [2021-06-05 15:41:19,669 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2748 transitions. Word has length 30 [2021-06-05 15:41:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:19,670 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2748 transitions. [2021-06-05 15:41:19,670 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) [2021-06-05 15:41:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2748 transitions. [2021-06-05 15:41:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:41:19,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:19,671 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:19,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:19,887 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1829687280, now seen corresponding path program 1 times [2021-06-05 15:41:19,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:19,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840411947] [2021-06-05 15:41:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:19,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:19,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840411947] [2021-06-05 15:41:19,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840411947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:19,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121080025] [2021-06-05 15:41:19,937 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 [2021-06-05 15:41:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:19,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:41:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:20,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:20,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:20,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:20,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:20,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:41:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:20,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121080025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:20,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:20,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 15:41:20,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713429071] [2021-06-05 15:41:20,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:41:20,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:20,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:41:20,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:41:20,065 INFO L87 Difference]: Start difference. First operand 975 states and 2748 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:20,120 INFO L93 Difference]: Finished difference Result 1251 states and 3576 transitions. [2021-06-05 15:41:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:41:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:41:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:20,124 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 15:41:20,124 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 15:41:20,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:41:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 15:41:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1182. [2021-06-05 15:41:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.852667231160034) internal successors, (3369), 1181 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3369 transitions. [2021-06-05 15:41:20,149 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3369 transitions. Word has length 33 [2021-06-05 15:41:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:20,149 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3369 transitions. [2021-06-05 15:41:20,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3369 transitions. [2021-06-05 15:41:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:41:20,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:20,151 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:20,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:20,367 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 125221240, now seen corresponding path program 5 times [2021-06-05 15:41:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:20,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333284442] [2021-06-05 15:41:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:20,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:20,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333284442] [2021-06-05 15:41:20,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333284442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:20,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548603660] [2021-06-05 15:41:20,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:20,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:41:20,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:41:20,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:20,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548603660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:20,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:41:20,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-06-05 15:41:20,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392053445] [2021-06-05 15:41:20,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:41:20,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:20,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:41:20,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:41:20,523 INFO L87 Difference]: Start difference. First operand 1182 states and 3369 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:20,533 INFO L93 Difference]: Finished difference Result 2091 states and 5916 transitions. [2021-06-05 15:41:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:41:20,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:41:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:20,541 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 15:41:20,541 INFO L226 Difference]: Without dead ends: 2023 [2021-06-05 15:41:20,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:41:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-06-05 15:41:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1796. [2021-06-05 15:41:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.8924791086350976) internal successors, (5192), 1795 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 5192 transitions. [2021-06-05 15:41:20,574 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 5192 transitions. Word has length 34 [2021-06-05 15:41:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:20,574 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 5192 transitions. [2021-06-05 15:41:20,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 5192 transitions. [2021-06-05 15:41:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:41:20,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:20,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:20,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:20,793 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:20,794 INFO L82 PathProgramCache]: Analyzing trace with hash -965931544, now seen corresponding path program 2 times [2021-06-05 15:41:20,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:20,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736426124] [2021-06-05 15:41:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:20,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:20,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736426124] [2021-06-05 15:41:20,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736426124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:20,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689648180] [2021-06-05 15:41:20,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:20,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:20,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:41:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:20,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:20,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:20,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:20,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:20,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2021-06-05 15:41:20,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:20,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:20,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:20,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:20,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:41:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:20,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689648180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:20,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:20,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:41:20,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547398672] [2021-06-05 15:41:20,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:41:20,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:20,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:41:20,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:41:20,970 INFO L87 Difference]: Start difference. First operand 1796 states and 5192 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:21,120 INFO L93 Difference]: Finished difference Result 2323 states and 6719 transitions. [2021-06-05 15:41:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:41:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:41:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:21,127 INFO L225 Difference]: With dead ends: 2323 [2021-06-05 15:41:21,127 INFO L226 Difference]: Without dead ends: 2323 [2021-06-05 15:41:21,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:41:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-05 15:41:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1767. [2021-06-05 15:41:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 2.9773499433748585) internal successors, (5258), 1766 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 5258 transitions. [2021-06-05 15:41:21,155 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 5258 transitions. Word has length 38 [2021-06-05 15:41:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:21,156 INFO L482 AbstractCegarLoop]: Abstraction has 1767 states and 5258 transitions. [2021-06-05 15:41:21,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 5258 transitions. [2021-06-05 15:41:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:41:21,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:21,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:21,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:21,378 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:21,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1481304392, now seen corresponding path program 6 times [2021-06-05 15:41:21,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:21,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187811918] [2021-06-05 15:41:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:21,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:21,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187811918] [2021-06-05 15:41:21,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187811918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:21,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490682929] [2021-06-05 15:41:21,400 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) [2021-06-05 15:41:21,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:41:21,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:21,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:41:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:21,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:21,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:21,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:21,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:21,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 15:41:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:21,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490682929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:21,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:21,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 15:41:21,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828389580] [2021-06-05 15:41:21,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:41:21,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:21,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:41:21,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:41:21,511 INFO L87 Difference]: Start difference. First operand 1767 states and 5258 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:21,564 INFO L93 Difference]: Finished difference Result 2051 states and 5911 transitions. [2021-06-05 15:41:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:41:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 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 39 [2021-06-05 15:41:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:21,569 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 15:41:21,570 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 15:41:21,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:41:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 15:41:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1746. [2021-06-05 15:41:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 2.9707736389684816) internal successors, (5184), 1745 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5184 transitions. [2021-06-05 15:41:21,593 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5184 transitions. Word has length 39 [2021-06-05 15:41:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:21,593 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5184 transitions. [2021-06-05 15:41:21,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5184 transitions. [2021-06-05 15:41:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:21,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:21,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:21,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:41:21,805 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash 16304851, now seen corresponding path program 3 times [2021-06-05 15:41:21,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:21,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946230703] [2021-06-05 15:41:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:22,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946230703] [2021-06-05 15:41:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946230703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964955833] [2021-06-05 15:41:22,024 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:22,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:41:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:22,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:41:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:22,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:22,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:22,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:22,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:22,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:41:22,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:22,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:22,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:22,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:22,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:22,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964955833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:22,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:22,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-06-05 15:41:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915720210] [2021-06-05 15:41:22,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:22,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:22,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:22,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:22,367 INFO L87 Difference]: Start difference. First operand 1746 states and 5184 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:23,436 INFO L93 Difference]: Finished difference Result 2913 states and 8362 transitions. [2021-06-05 15:41:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:41:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:23,444 INFO L225 Difference]: With dead ends: 2913 [2021-06-05 15:41:23,444 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 15:41:23,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 713.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:41:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 15:41:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2156. [2021-06-05 15:41:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 2.917401392111369) internal successors, (6287), 2155 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 6287 transitions. [2021-06-05 15:41:23,476 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 6287 transitions. Word has length 42 [2021-06-05 15:41:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:23,476 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 6287 transitions. [2021-06-05 15:41:23,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:23,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 6287 transitions. [2021-06-05 15:41:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:23,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:23,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:23,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 15:41:23,693 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:23,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1358209761, now seen corresponding path program 4 times [2021-06-05 15:41:23,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:23,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271686652] [2021-06-05 15:41:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:23,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:23,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271686652] [2021-06-05 15:41:23,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271686652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:23,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498989204] [2021-06-05 15:41:23,891 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:23,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:23,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:24,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:24,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:24,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:24,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:24,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:24,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:24,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:24,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:24,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:24,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:24,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498989204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:24,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:24,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 15:41:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374553776] [2021-06-05 15:41:24,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:41:24,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:41:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:41:24,178 INFO L87 Difference]: Start difference. First operand 2156 states and 6287 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:25,027 INFO L93 Difference]: Finished difference Result 3306 states and 9422 transitions. [2021-06-05 15:41:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:41:25,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:25,033 INFO L225 Difference]: With dead ends: 3306 [2021-06-05 15:41:25,033 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 15:41:25,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:41:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 15:41:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2163. [2021-06-05 15:41:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.9167437557816838) internal successors, (6306), 2162 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 6306 transitions. [2021-06-05 15:41:25,065 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 6306 transitions. Word has length 42 [2021-06-05 15:41:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:25,065 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 6306 transitions. [2021-06-05 15:41:25,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 6306 transitions. [2021-06-05 15:41:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:25,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:25,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:25,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:25,289 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1763071255, now seen corresponding path program 5 times [2021-06-05 15:41:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:25,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13324009] [2021-06-05 15:41:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:25,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:25,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13324009] [2021-06-05 15:41:25,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13324009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:25,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026411419] [2021-06-05 15:41:25,519 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:25,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:41:25,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:41:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:25,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:25,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:25,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:25,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:25,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:25,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:25,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:25,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:25,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:25,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:25,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026411419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:25,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:25,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 15:41:25,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487330053] [2021-06-05 15:41:25,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:41:25,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:25,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:41:25,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:41:25,818 INFO L87 Difference]: Start difference. First operand 2163 states and 6306 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:26,653 INFO L93 Difference]: Finished difference Result 3526 states and 10025 transitions. [2021-06-05 15:41:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:41:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:26,658 INFO L225 Difference]: With dead ends: 3526 [2021-06-05 15:41:26,658 INFO L226 Difference]: Without dead ends: 3404 [2021-06-05 15:41:26,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:41:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-06-05 15:41:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2248. [2021-06-05 15:41:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.9087672452158433) internal successors, (6536), 2247 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 6536 transitions. [2021-06-05 15:41:26,708 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 6536 transitions. Word has length 42 [2021-06-05 15:41:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:26,709 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 6536 transitions. [2021-06-05 15:41:26,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 6536 transitions. [2021-06-05 15:41:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:26,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:26,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:26,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:26,931 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:26,931 INFO L82 PathProgramCache]: Analyzing trace with hash 297241337, now seen corresponding path program 6 times [2021-06-05 15:41:26,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:26,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347416371] [2021-06-05 15:41:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:27,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:27,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347416371] [2021-06-05 15:41:27,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347416371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:27,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970578626] [2021-06-05 15:41:27,134 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:27,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:41:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:41:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:27,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:27,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:27,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:27,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:27,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:41:27,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:27,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:27,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:27,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:27,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:27,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970578626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:27,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:27,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-06-05 15:41:27,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822045035] [2021-06-05 15:41:27,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:41:27,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:41:27,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:41:27,544 INFO L87 Difference]: Start difference. First operand 2248 states and 6536 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:28,609 INFO L93 Difference]: Finished difference Result 3475 states and 9879 transitions. [2021-06-05 15:41:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:41:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:28,615 INFO L225 Difference]: With dead ends: 3475 [2021-06-05 15:41:28,615 INFO L226 Difference]: Without dead ends: 3353 [2021-06-05 15:41:28,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:41:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-06-05 15:41:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2272. [2021-06-05 15:41:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.9114927344782036) internal successors, (6612), 2271 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 6612 transitions. [2021-06-05 15:41:28,647 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 6612 transitions. Word has length 42 [2021-06-05 15:41:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:28,647 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 6612 transitions. [2021-06-05 15:41:28,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 6612 transitions. [2021-06-05 15:41:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:28,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:28,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:28,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:41:28,865 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2110424203, now seen corresponding path program 7 times [2021-06-05 15:41:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:28,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226925526] [2021-06-05 15:41:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:29,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:29,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226925526] [2021-06-05 15:41:29,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226925526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:29,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352894816] [2021-06-05 15:41:29,066 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:29,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:29,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:29,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:29,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:29,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:29,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:41:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:29,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:29,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:29,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:29,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:29,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352894816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:29,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:29,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:41:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869663486] [2021-06-05 15:41:29,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:41:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:41:29,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:41:29,429 INFO L87 Difference]: Start difference. First operand 2272 states and 6612 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:30,603 INFO L93 Difference]: Finished difference Result 4096 states and 11552 transitions. [2021-06-05 15:41:30,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:41:30,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:30,609 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 15:41:30,609 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 15:41:30,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:41:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 15:41:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 2275. [2021-06-05 15:41:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.9124890061565525) internal successors, (6623), 2274 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6623 transitions. [2021-06-05 15:41:30,643 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6623 transitions. Word has length 42 [2021-06-05 15:41:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:30,643 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6623 transitions. [2021-06-05 15:41:30,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6623 transitions. [2021-06-05 15:41:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:30,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:30,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:30,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:41:30,861 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1115192543, now seen corresponding path program 8 times [2021-06-05 15:41:30,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:30,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141048569] [2021-06-05 15:41:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:31,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:31,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141048569] [2021-06-05 15:41:31,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141048569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:31,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791943901] [2021-06-05 15:41:31,054 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:31,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:31,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:31,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:31,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:31,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:31,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:31,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:31,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:31,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:41:31,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:31,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:31,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:31,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:31,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791943901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:31,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:31,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:41:31,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754027557] [2021-06-05 15:41:31,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:41:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:41:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:41:31,398 INFO L87 Difference]: Start difference. First operand 2275 states and 6623 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:32,731 INFO L93 Difference]: Finished difference Result 4339 states and 12285 transitions. [2021-06-05 15:41:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:41:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:32,735 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 15:41:32,736 INFO L226 Difference]: Without dead ends: 4217 [2021-06-05 15:41:32,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:41:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2021-06-05 15:41:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2311. [2021-06-05 15:41:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 2.9294372294372293) internal successors, (6767), 2310 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 6767 transitions. [2021-06-05 15:41:32,768 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 6767 transitions. Word has length 42 [2021-06-05 15:41:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:32,768 INFO L482 AbstractCegarLoop]: Abstraction has 2311 states and 6767 transitions. [2021-06-05 15:41:32,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 6767 transitions. [2021-06-05 15:41:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:32,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:32,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:32,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:41:32,985 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 374723421, now seen corresponding path program 9 times [2021-06-05 15:41:32,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:32,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989469696] [2021-06-05 15:41:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:33,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989469696] [2021-06-05 15:41:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989469696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583128504] [2021-06-05 15:41:33,178 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:33,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:41:33,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:33,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:33,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:33,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:33,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:33,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:33,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:41:33,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:33,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:33,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:33,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:33,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:33,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583128504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:33,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:33,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:41:33,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542808010] [2021-06-05 15:41:33,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:41:33,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:41:33,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:41:33,504 INFO L87 Difference]: Start difference. First operand 2311 states and 6767 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:34,852 INFO L93 Difference]: Finished difference Result 4522 states and 12854 transitions. [2021-06-05 15:41:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:41:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:34,857 INFO L225 Difference]: With dead ends: 4522 [2021-06-05 15:41:34,857 INFO L226 Difference]: Without dead ends: 4400 [2021-06-05 15:41:34,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 875.0ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:41:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-06-05 15:41:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2330. [2021-06-05 15:41:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 2.9373121511378275) internal successors, (6841), 2329 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 6841 transitions. [2021-06-05 15:41:34,889 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 6841 transitions. Word has length 42 [2021-06-05 15:41:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:34,889 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 6841 transitions. [2021-06-05 15:41:34,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 6841 transitions. [2021-06-05 15:41:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:34,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:34,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:35,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:35,108 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1968823617, now seen corresponding path program 10 times [2021-06-05 15:41:35,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:35,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656682904] [2021-06-05 15:41:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:35,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:35,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656682904] [2021-06-05 15:41:35,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656682904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:35,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958703495] [2021-06-05 15:41:35,323 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:35,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:35,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:35,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:35,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:35,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:35,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:41:35,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:35,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:35,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:35,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:35,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:35,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958703495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:35,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:35,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:41:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043300658] [2021-06-05 15:41:35,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:41:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:41:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:41:35,650 INFO L87 Difference]: Start difference. First operand 2330 states and 6841 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:37,125 INFO L93 Difference]: Finished difference Result 5127 states and 14673 transitions. [2021-06-05 15:41:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:41:37,126 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:37,131 INFO L225 Difference]: With dead ends: 5127 [2021-06-05 15:41:37,131 INFO L226 Difference]: Without dead ends: 5014 [2021-06-05 15:41:37,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:41:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-06-05 15:41:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 2408. [2021-06-05 15:41:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.966348151225592) internal successors, (7140), 2407 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7140 transitions. [2021-06-05 15:41:37,170 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7140 transitions. Word has length 42 [2021-06-05 15:41:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:37,170 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7140 transitions. [2021-06-05 15:41:37,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7140 transitions. [2021-06-05 15:41:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:37,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:37,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:37,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:41:37,390 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:37,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1999273139, now seen corresponding path program 11 times [2021-06-05 15:41:37,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:37,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148964348] [2021-06-05 15:41:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:37,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:37,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148964348] [2021-06-05 15:41:37,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148964348] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:41:37,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:41:37,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:41:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637045689] [2021-06-05 15:41:37,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:41:37,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:41:37,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:41:37,411 INFO L87 Difference]: Start difference. First operand 2408 states and 7140 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:37,429 INFO L93 Difference]: Finished difference Result 5624 states and 16348 transitions. [2021-06-05 15:41:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:41:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:37,434 INFO L225 Difference]: With dead ends: 5624 [2021-06-05 15:41:37,434 INFO L226 Difference]: Without dead ends: 5361 [2021-06-05 15:41:37,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:41:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-05 15:41:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4595. [2021-06-05 15:41:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4594 states have (on average 2.994122768828907) internal successors, (13755), 4594 states have internal predecessors, (13755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 13755 transitions. [2021-06-05 15:41:37,493 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 13755 transitions. Word has length 42 [2021-06-05 15:41:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:37,494 INFO L482 AbstractCegarLoop]: Abstraction has 4595 states and 13755 transitions. [2021-06-05 15:41:37,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 13755 transitions. [2021-06-05 15:41:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:37,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:37,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:37,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 15:41:37,499 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2131149121, now seen corresponding path program 12 times [2021-06-05 15:41:37,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:37,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404390842] [2021-06-05 15:41:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:37,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:37,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404390842] [2021-06-05 15:41:37,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404390842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:37,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457021793] [2021-06-05 15:41:37,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:37,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:41:37,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:41:37,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:37,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:37,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:37,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:37,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:37,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:37,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:37,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:37,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:37,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:37,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:38,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457021793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:38,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:38,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:38,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798571980] [2021-06-05 15:41:38,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:38,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:38,039 INFO L87 Difference]: Start difference. First operand 4595 states and 13755 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:38,919 INFO L93 Difference]: Finished difference Result 5285 states and 15482 transitions. [2021-06-05 15:41:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:41:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:38,925 INFO L225 Difference]: With dead ends: 5285 [2021-06-05 15:41:38,925 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 15:41:38,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:41:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 15:41:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4600. [2021-06-05 15:41:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.994998912807132) internal successors, (13774), 4599 states have internal predecessors, (13774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 13774 transitions. [2021-06-05 15:41:38,977 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 13774 transitions. Word has length 42 [2021-06-05 15:41:38,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:38,977 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 13774 transitions. [2021-06-05 15:41:38,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 13774 transitions. [2021-06-05 15:41:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:38,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:38,983 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:39,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:39,197 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1061798571, now seen corresponding path program 13 times [2021-06-05 15:41:39,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:39,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534194653] [2021-06-05 15:41:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:39,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:39,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534194653] [2021-06-05 15:41:39,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534194653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:39,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050681199] [2021-06-05 15:41:39,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:39,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:39,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:39,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:39,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:39,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:39,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:39,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:39,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:39,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:39,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:39,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050681199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:39,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:39,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:39,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221927226] [2021-06-05 15:41:39,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:39,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:39,689 INFO L87 Difference]: Start difference. First operand 4600 states and 13774 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:40,779 INFO L93 Difference]: Finished difference Result 5862 states and 16975 transitions. [2021-06-05 15:41:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:41:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:40,785 INFO L225 Difference]: With dead ends: 5862 [2021-06-05 15:41:40,785 INFO L226 Difference]: Without dead ends: 5641 [2021-06-05 15:41:40,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2021-06-05 15:41:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 4612. [2021-06-05 15:41:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.9969637822598134) internal successors, (13819), 4611 states have internal predecessors, (13819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 13819 transitions. [2021-06-05 15:41:40,834 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 13819 transitions. Word has length 42 [2021-06-05 15:41:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:40,834 INFO L482 AbstractCegarLoop]: Abstraction has 4612 states and 13819 transitions. [2021-06-05 15:41:40,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 13819 transitions. [2021-06-05 15:41:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:40,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:40,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:41,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:41:41,041 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:41,041 INFO L82 PathProgramCache]: Analyzing trace with hash 428117393, now seen corresponding path program 14 times [2021-06-05 15:41:41,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:41,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218444159] [2021-06-05 15:41:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:41,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:41,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218444159] [2021-06-05 15:41:41,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218444159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:41,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562394629] [2021-06-05 15:41:41,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:41,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:41,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:41,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:41,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:41,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:41,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:41,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:41,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:41,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:41,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:41,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:41,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:41,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562394629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:41,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:41,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:41,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193501697] [2021-06-05 15:41:41,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:41,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:41,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:41,532 INFO L87 Difference]: Start difference. First operand 4612 states and 13819 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:42,780 INFO L93 Difference]: Finished difference Result 6189 states and 17997 transitions. [2021-06-05 15:41:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:41:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:42,786 INFO L225 Difference]: With dead ends: 6189 [2021-06-05 15:41:42,787 INFO L226 Difference]: Without dead ends: 5968 [2021-06-05 15:41:42,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 753.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5968 states. [2021-06-05 15:41:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5968 to 4616. [2021-06-05 15:41:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.996749729144095) internal successors, (13830), 4615 states have internal predecessors, (13830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13830 transitions. [2021-06-05 15:41:42,836 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13830 transitions. Word has length 42 [2021-06-05 15:41:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:42,836 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13830 transitions. [2021-06-05 15:41:42,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13830 transitions. [2021-06-05 15:41:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:42,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:42,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:43,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:41:43,057 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2022217589, now seen corresponding path program 15 times [2021-06-05 15:41:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:43,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577870176] [2021-06-05 15:41:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:43,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:43,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577870176] [2021-06-05 15:41:43,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577870176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:43,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965513066] [2021-06-05 15:41:43,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:43,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:41:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:41:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:43,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:43,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:43,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:43,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:43,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:43,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965513066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763175891] [2021-06-05 15:41:43,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:43,524 INFO L87 Difference]: Start difference. First operand 4616 states and 13830 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:44,704 INFO L93 Difference]: Finished difference Result 7088 states and 20488 transitions. [2021-06-05 15:41:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:41:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:44,711 INFO L225 Difference]: With dead ends: 7088 [2021-06-05 15:41:44,711 INFO L226 Difference]: Without dead ends: 6902 [2021-06-05 15:41:44,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:41:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6902 states. [2021-06-05 15:41:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6902 to 4597. [2021-06-05 15:41:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2021-06-05 15:41:44,766 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2021-06-05 15:41:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:44,766 INFO L482 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2021-06-05 15:41:44,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2021-06-05 15:41:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:44,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:44,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:44,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:41:44,973 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash -227017667, now seen corresponding path program 16 times [2021-06-05 15:41:44,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:44,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732039684] [2021-06-05 15:41:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:45,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732039684] [2021-06-05 15:41:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732039684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870580849] [2021-06-05 15:41:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:45,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:45,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:45,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:45,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:45,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:45,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:45,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:45,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:45,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:45,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870580849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:45,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:45,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 15:41:45,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674079093] [2021-06-05 15:41:45,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:41:45,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:45,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:41:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:41:45,423 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:46,273 INFO L93 Difference]: Finished difference Result 5261 states and 15418 transitions. [2021-06-05 15:41:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:41:46,274 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:46,279 INFO L225 Difference]: With dead ends: 5261 [2021-06-05 15:41:46,279 INFO L226 Difference]: Without dead ends: 5040 [2021-06-05 15:41:46,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:41:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-06-05 15:41:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 4604. [2021-06-05 15:41:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4603 states have (on average 2.9941342602650445) internal successors, (13782), 4603 states have internal predecessors, (13782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 13782 transitions. [2021-06-05 15:41:46,326 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 13782 transitions. Word has length 42 [2021-06-05 15:41:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:46,326 INFO L482 AbstractCegarLoop]: Abstraction has 4604 states and 13782 transitions. [2021-06-05 15:41:46,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 13782 transitions. [2021-06-05 15:41:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:46,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:46,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:46,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:41:46,532 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 997433393, now seen corresponding path program 17 times [2021-06-05 15:41:46,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:46,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715989900] [2021-06-05 15:41:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:46,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:46,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715989900] [2021-06-05 15:41:46,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715989900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:46,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468752612] [2021-06-05 15:41:46,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:46,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:41:46,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:41:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:46,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:46,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:46,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:46,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:46,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:46,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:46,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:46,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468752612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:46,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:46,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 15:41:46,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455786924] [2021-06-05 15:41:46,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:41:46,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:46,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:41:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:41:46,977 INFO L87 Difference]: Start difference. First operand 4604 states and 13782 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:47,768 INFO L93 Difference]: Finished difference Result 5518 states and 16059 transitions. [2021-06-05 15:41:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:41:47,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:47,774 INFO L225 Difference]: With dead ends: 5518 [2021-06-05 15:41:47,774 INFO L226 Difference]: Without dead ends: 5297 [2021-06-05 15:41:47,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:41:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2021-06-05 15:41:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 4597. [2021-06-05 15:41:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2021-06-05 15:41:47,825 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2021-06-05 15:41:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:47,825 INFO L482 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2021-06-05 15:41:47,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2021-06-05 15:41:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:47,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:47,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:48,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:41:48,031 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1021009315, now seen corresponding path program 18 times [2021-06-05 15:41:48,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:48,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958482295] [2021-06-05 15:41:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:48,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:48,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958482295] [2021-06-05 15:41:48,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958482295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291985303] [2021-06-05 15:41:48,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:48,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:41:48,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:48,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:48,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:48,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:48,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:48,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:48,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:48,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:48,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:48,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291985303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:48,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:48,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706851739] [2021-06-05 15:41:48,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:48,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:48,514 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:49,668 INFO L93 Difference]: Finished difference Result 6016 states and 17495 transitions. [2021-06-05 15:41:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:41:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:49,675 INFO L225 Difference]: With dead ends: 6016 [2021-06-05 15:41:49,675 INFO L226 Difference]: Without dead ends: 5795 [2021-06-05 15:41:49,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 747.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2021-06-05 15:41:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 4617. [2021-06-05 15:41:49,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.997833622183709) internal successors, (13838), 4616 states have internal predecessors, (13838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13838 transitions. [2021-06-05 15:41:49,728 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13838 transitions. Word has length 42 [2021-06-05 15:41:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:49,728 INFO L482 AbstractCegarLoop]: Abstraction has 4617 states and 13838 transitions. [2021-06-05 15:41:49,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13838 transitions. [2021-06-05 15:41:49,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:49,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:49,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:49,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:49,933 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash 468906649, now seen corresponding path program 19 times [2021-06-05 15:41:49,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:49,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542141291] [2021-06-05 15:41:49,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:50,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:50,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542141291] [2021-06-05 15:41:50,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542141291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:50,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324434779] [2021-06-05 15:41:50,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:50,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:50,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:50,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:50,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:50,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:50,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:50,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:50,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:50,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:50,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324434779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:50,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:50,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:50,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713481961] [2021-06-05 15:41:50,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:50,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:50,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:50,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:50,439 INFO L87 Difference]: Start difference. First operand 4617 states and 13838 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:51,537 INFO L93 Difference]: Finished difference Result 6525 states and 18951 transitions. [2021-06-05 15:41:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:41:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:51,544 INFO L225 Difference]: With dead ends: 6525 [2021-06-05 15:41:51,544 INFO L226 Difference]: Without dead ends: 6304 [2021-06-05 15:41:51,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-06-05 15:41:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 4621. [2021-06-05 15:41:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 2.9976190476190476) internal successors, (13849), 4620 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 13849 transitions. [2021-06-05 15:41:51,600 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 13849 transitions. Word has length 42 [2021-06-05 15:41:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:51,600 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 13849 transitions. [2021-06-05 15:41:51,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 13849 transitions. [2021-06-05 15:41:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:51,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:51,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:51,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:41:51,809 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2063006845, now seen corresponding path program 20 times [2021-06-05 15:41:51,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:51,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835768379] [2021-06-05 15:41:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:51,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:51,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835768379] [2021-06-05 15:41:51,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835768379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:51,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582551692] [2021-06-05 15:41:51,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:52,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:52,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:52,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:41:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:52,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:52,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:52,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 15:41:52,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:52,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:52,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:52,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582551692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:52,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:52,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:52,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106503057] [2021-06-05 15:41:52,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:52,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:52,294 INFO L87 Difference]: Start difference. First operand 4621 states and 13849 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:53,442 INFO L93 Difference]: Finished difference Result 7424 states and 21442 transitions. [2021-06-05 15:41:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:41:53,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:53,449 INFO L225 Difference]: With dead ends: 7424 [2021-06-05 15:41:53,449 INFO L226 Difference]: Without dead ends: 7238 [2021-06-05 15:41:53,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:41:53,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-05 15:41:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 4605. [2021-06-05 15:41:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2021-06-05 15:41:53,506 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2021-06-05 15:41:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:53,506 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2021-06-05 15:41:53,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2021-06-05 15:41:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:53,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:53,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:53,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:53,710 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:53,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1949908255, now seen corresponding path program 21 times [2021-06-05 15:41:53,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:53,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76317238] [2021-06-05 15:41:53,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:53,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76317238] [2021-06-05 15:41:53,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76317238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135262576] [2021-06-05 15:41:53,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:53,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:41:53,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:53,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:41:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:54,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:54,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:54,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:54,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:54,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:54,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:54,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:54,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:54,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:54,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:54,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135262576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:54,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:54,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:41:54,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594292966] [2021-06-05 15:41:54,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:41:54,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:41:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:41:54,199 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:55,211 INFO L93 Difference]: Finished difference Result 5827 states and 16946 transitions. [2021-06-05 15:41:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:41:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:55,217 INFO L225 Difference]: With dead ends: 5827 [2021-06-05 15:41:55,217 INFO L226 Difference]: Without dead ends: 5606 [2021-06-05 15:41:55,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:41:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2021-06-05 15:41:55,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 4605. [2021-06-05 15:41:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2021-06-05 15:41:55,267 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2021-06-05 15:41:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:55,267 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2021-06-05 15:41:55,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2021-06-05 15:41:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:55,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:55,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:55,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:41:55,472 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1599704497, now seen corresponding path program 22 times [2021-06-05 15:41:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:55,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286388263] [2021-06-05 15:41:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:55,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:55,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286388263] [2021-06-05 15:41:55,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286388263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:55,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602640839] [2021-06-05 15:41:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:55,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:55,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:55,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:55,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:55,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:55,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:41:55,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:55,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:55,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:55,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:55,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:56,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602640839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:56,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:56,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:41:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740427695] [2021-06-05 15:41:56,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:41:56,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:56,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:41:56,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:41:56,035 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:56,856 INFO L93 Difference]: Finished difference Result 5154 states and 15161 transitions. [2021-06-05 15:41:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:41:56,856 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:56,861 INFO L225 Difference]: With dead ends: 5154 [2021-06-05 15:41:56,861 INFO L226 Difference]: Without dead ends: 4933 [2021-06-05 15:41:56,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:41:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-06-05 15:41:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4611. [2021-06-05 15:41:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 2.996095444685466) internal successors, (13812), 4610 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 13812 transitions. [2021-06-05 15:41:56,907 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 13812 transitions. Word has length 42 [2021-06-05 15:41:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:56,907 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 13812 transitions. [2021-06-05 15:41:56,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 13812 transitions. [2021-06-05 15:41:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:56,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:56,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:57,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:57,112 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:57,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1625912249, now seen corresponding path program 23 times [2021-06-05 15:41:57,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:57,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662584870] [2021-06-05 15:41:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:57,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:57,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662584870] [2021-06-05 15:41:57,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662584870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:57,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286891924] [2021-06-05 15:41:57,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:57,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:57,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:57,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:57,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:57,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:57,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:57,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:57,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:41:57,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:57,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:57,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:57,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:57,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:57,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286891924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:57,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:57,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 15:41:57,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463698413] [2021-06-05 15:41:57,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:41:57,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:41:57,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:41:57,721 INFO L87 Difference]: Start difference. First operand 4611 states and 13812 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:58,731 INFO L93 Difference]: Finished difference Result 5518 states and 16071 transitions. [2021-06-05 15:41:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:41:58,731 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:41:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:58,737 INFO L225 Difference]: With dead ends: 5518 [2021-06-05 15:41:58,737 INFO L226 Difference]: Without dead ends: 5297 [2021-06-05 15:41:58,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 919.8ms TimeCoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:41:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2021-06-05 15:41:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 4623. [2021-06-05 15:41:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 2.998052790999567) internal successors, (13857), 4622 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 13857 transitions. [2021-06-05 15:41:58,787 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 13857 transitions. Word has length 42 [2021-06-05 15:41:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:58,787 INFO L482 AbstractCegarLoop]: Abstraction has 4623 states and 13857 transitions. [2021-06-05 15:41:58,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:41:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 13857 transitions. [2021-06-05 15:41:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:41:58,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:58,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:41:59,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:41:59,001 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash -135996285, now seen corresponding path program 24 times [2021-06-05 15:41:59,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:59,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566745877] [2021-06-05 15:41:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:41:59,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:59,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566745877] [2021-06-05 15:41:59,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566745877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:59,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336098892] [2021-06-05 15:41:59,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:59,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:41:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:41:59,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:59,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:41:59,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:59,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:59,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:59,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:41:59,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:41:59,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:59,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:59,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:41:59,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:41:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:41:59,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336098892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:59,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:59,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:41:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594227108] [2021-06-05 15:41:59,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:41:59,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:41:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:41:59,532 INFO L87 Difference]: Start difference. First operand 4623 states and 13857 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:00,584 INFO L93 Difference]: Finished difference Result 5689 states and 16671 transitions. [2021-06-05 15:42:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:42:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:00,590 INFO L225 Difference]: With dead ends: 5689 [2021-06-05 15:42:00,590 INFO L226 Difference]: Without dead ends: 5468 [2021-06-05 15:42:00,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 838.0ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:42:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2021-06-05 15:42:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 4627. [2021-06-05 15:42:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.9978383052313013) internal successors, (13868), 4626 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13868 transitions. [2021-06-05 15:42:00,637 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13868 transitions. Word has length 42 [2021-06-05 15:42:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:00,638 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13868 transitions. [2021-06-05 15:42:00,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13868 transitions. [2021-06-05 15:42:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:00,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:00,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:00,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:00,847 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1458103911, now seen corresponding path program 25 times [2021-06-05 15:42:00,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:00,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822426538] [2021-06-05 15:42:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:01,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:01,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822426538] [2021-06-05 15:42:01,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822426538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:01,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720856910] [2021-06-05 15:42:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:01,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:01,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:01,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:01,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:01,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:42:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:01,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:01,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:01,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:01,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720856910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:01,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:01,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:01,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270002599] [2021-06-05 15:42:01,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:01,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:01,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:01,356 INFO L87 Difference]: Start difference. First operand 4627 states and 13868 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:02,489 INFO L93 Difference]: Finished difference Result 6127 states and 17962 transitions. [2021-06-05 15:42:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:42:02,489 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:02,495 INFO L225 Difference]: With dead ends: 6127 [2021-06-05 15:42:02,495 INFO L226 Difference]: Without dead ends: 5941 [2021-06-05 15:42:02,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:42:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-06-05 15:42:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 4608. [2021-06-05 15:42:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 2.9956587801172128) internal successors, (13801), 4607 states have internal predecessors, (13801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 13801 transitions. [2021-06-05 15:42:02,544 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 13801 transitions. Word has length 42 [2021-06-05 15:42:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:02,544 INFO L482 AbstractCegarLoop]: Abstraction has 4608 states and 13801 transitions. [2021-06-05 15:42:02,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 13801 transitions. [2021-06-05 15:42:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:02,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:02,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:02,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:42:02,749 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:02,749 INFO L82 PathProgramCache]: Analyzing trace with hash -202854927, now seen corresponding path program 26 times [2021-06-05 15:42:02,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:02,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074380350] [2021-06-05 15:42:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:02,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:02,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074380350] [2021-06-05 15:42:02,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074380350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:02,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23881170] [2021-06-05 15:42:02,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:02,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:02,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:02,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:02,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:03,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:03,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:03,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:03,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:03,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:42:03,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:03,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:03,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:03,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:03,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:03,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23881170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:03,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:03,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:03,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311890298] [2021-06-05 15:42:03,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:03,255 INFO L87 Difference]: Start difference. First operand 4608 states and 13801 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:04,045 INFO L93 Difference]: Finished difference Result 5246 states and 15565 transitions. [2021-06-05 15:42:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:42:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:04,050 INFO L225 Difference]: With dead ends: 5246 [2021-06-05 15:42:04,050 INFO L226 Difference]: Without dead ends: 5025 [2021-06-05 15:42:04,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 724.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:42:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2021-06-05 15:42:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4628. [2021-06-05 15:42:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.99459693105684) internal successors, (13856), 4627 states have internal predecessors, (13856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13856 transitions. [2021-06-05 15:42:04,096 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13856 transitions. Word has length 42 [2021-06-05 15:42:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:04,096 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13856 transitions. [2021-06-05 15:42:04,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13856 transitions. [2021-06-05 15:42:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:04,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:04,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:04,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:04,316 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1391245269, now seen corresponding path program 27 times [2021-06-05 15:42:04,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:04,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782755391] [2021-06-05 15:42:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:04,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782755391] [2021-06-05 15:42:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782755391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388856427] [2021-06-05 15:42:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:04,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:42:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:42:04,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:04,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:04,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:04,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 15:42:04,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:04,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:04,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:04,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:04,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388856427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:04,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:04,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:04,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58427551] [2021-06-05 15:42:04,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:04,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:04,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:04,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:04,831 INFO L87 Difference]: Start difference. First operand 4628 states and 13856 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:05,750 INFO L93 Difference]: Finished difference Result 5612 states and 16671 transitions. [2021-06-05 15:42:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:42:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:05,757 INFO L225 Difference]: With dead ends: 5612 [2021-06-05 15:42:05,757 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 15:42:05,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 768.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:42:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 15:42:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4624. [2021-06-05 15:42:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4623 states have (on average 2.9948085658663204) internal successors, (13845), 4623 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 13845 transitions. [2021-06-05 15:42:05,803 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 13845 transitions. Word has length 42 [2021-06-05 15:42:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:05,803 INFO L482 AbstractCegarLoop]: Abstraction has 4624 states and 13845 transitions. [2021-06-05 15:42:05,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 13845 transitions. [2021-06-05 15:42:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:05,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:05,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:06,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:42:06,013 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1423564845, now seen corresponding path program 28 times [2021-06-05 15:42:06,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:06,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999724413] [2021-06-05 15:42:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:06,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:06,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999724413] [2021-06-05 15:42:06,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999724413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:06,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607662888] [2021-06-05 15:42:06,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:06,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:06,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:06,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:06,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:06,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:06,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:06,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:42:06,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:06,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:06,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:06,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:06,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:06,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607662888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:06,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:06,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:06,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255903144] [2021-06-05 15:42:06,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:06,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:06,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:06,564 INFO L87 Difference]: Start difference. First operand 4624 states and 13845 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:07,410 INFO L93 Difference]: Finished difference Result 5503 states and 16361 transitions. [2021-06-05 15:42:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:42:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:07,416 INFO L225 Difference]: With dead ends: 5503 [2021-06-05 15:42:07,416 INFO L226 Difference]: Without dead ends: 5317 [2021-06-05 15:42:07,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:42:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5317 states. [2021-06-05 15:42:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5317 to 4636. [2021-06-05 15:42:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 15:42:07,470 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 15:42:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:07,470 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 15:42:07,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 15:42:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:07,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:07,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:07,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:42:07,689 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:07,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1528185143, now seen corresponding path program 29 times [2021-06-05 15:42:07,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:07,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693294757] [2021-06-05 15:42:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:07,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:07,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693294757] [2021-06-05 15:42:07,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693294757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:07,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099746100] [2021-06-05 15:42:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:07,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:07,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:07,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:07,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:07,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:07,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:07,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:42:08,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:08,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:08,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:08,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:08,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:08,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099746100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:08,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:08,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 15:42:08,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412305042] [2021-06-05 15:42:08,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:42:08,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:08,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:42:08,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:08,246 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:09,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:09,281 INFO L93 Difference]: Finished difference Result 5218 states and 15352 transitions. [2021-06-05 15:42:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:42:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:09,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:09,287 INFO L225 Difference]: With dead ends: 5218 [2021-06-05 15:42:09,287 INFO L226 Difference]: Without dead ends: 4997 [2021-06-05 15:42:09,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 908.3ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:42:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2021-06-05 15:42:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 4648. [2021-06-05 15:42:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 2.9952657628577577) internal successors, (13919), 4647 states have internal predecessors, (13919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 13919 transitions. [2021-06-05 15:42:09,332 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 13919 transitions. Word has length 42 [2021-06-05 15:42:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:09,332 INFO L482 AbstractCegarLoop]: Abstraction has 4648 states and 13919 transitions. [2021-06-05 15:42:09,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 13919 transitions. [2021-06-05 15:42:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:09,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:09,336 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:09,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:42:09,537 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1276866189, now seen corresponding path program 30 times [2021-06-05 15:42:09,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:09,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607177776] [2021-06-05 15:42:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:09,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607177776] [2021-06-05 15:42:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607177776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:09,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373085362] [2021-06-05 15:42:09,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:09,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:42:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:09,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:09,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:09,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:09,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:09,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:09,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:09,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:42:09,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:09,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:09,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:09,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:09,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373085362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:10,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:10,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:10,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56593053] [2021-06-05 15:42:10,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:10,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:10,065 INFO L87 Difference]: Start difference. First operand 4648 states and 13919 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:11,063 INFO L93 Difference]: Finished difference Result 5672 states and 16626 transitions. [2021-06-05 15:42:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:42:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:11,069 INFO L225 Difference]: With dead ends: 5672 [2021-06-05 15:42:11,069 INFO L226 Difference]: Without dead ends: 5451 [2021-06-05 15:42:11,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 863.6ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:42:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-05 15:42:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4652. [2021-06-05 15:42:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9950548269189423) internal successors, (13930), 4651 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13930 transitions. [2021-06-05 15:42:11,115 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13930 transitions. Word has length 42 [2021-06-05 15:42:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:11,115 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 13930 transitions. [2021-06-05 15:42:11,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13930 transitions. [2021-06-05 15:42:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:11,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:11,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:11,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:42:11,320 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash 317234007, now seen corresponding path program 31 times [2021-06-05 15:42:11,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:11,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734849254] [2021-06-05 15:42:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:11,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:11,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734849254] [2021-06-05 15:42:11,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734849254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:11,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085051755] [2021-06-05 15:42:11,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:11,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:11,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:11,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:11,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:11,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:42:11,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:11,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:11,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:11,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:11,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085051755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:11,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:11,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516874427] [2021-06-05 15:42:11,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:11,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:11,817 INFO L87 Difference]: Start difference. First operand 4652 states and 13930 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:12,968 INFO L93 Difference]: Finished difference Result 6058 states and 17770 transitions. [2021-06-05 15:42:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:42:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:12,975 INFO L225 Difference]: With dead ends: 6058 [2021-06-05 15:42:12,976 INFO L226 Difference]: Without dead ends: 5872 [2021-06-05 15:42:12,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 881.9ms TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:42:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-06-05 15:42:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 4636. [2021-06-05 15:42:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 15:42:13,026 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 15:42:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 15:42:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 15:42:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:13,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:13,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:13,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:42:13,230 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1040049667, now seen corresponding path program 32 times [2021-06-05 15:42:13,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:13,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014244776] [2021-06-05 15:42:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:13,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014244776] [2021-06-05 15:42:13,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014244776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115252813] [2021-06-05 15:42:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:13,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:13,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:42:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:13,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:13,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:13,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:13,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:13,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:13,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:13,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:13,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:13,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115252813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:13,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:13,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:13,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219608727] [2021-06-05 15:42:13,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:13,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:13,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:13,726 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:14,585 INFO L93 Difference]: Finished difference Result 5185 states and 15242 transitions. [2021-06-05 15:42:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:42:14,586 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:14,591 INFO L225 Difference]: With dead ends: 5185 [2021-06-05 15:42:14,591 INFO L226 Difference]: Without dead ends: 4964 [2021-06-05 15:42:14,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:42:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2021-06-05 15:42:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 4642. [2021-06-05 15:42:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 2.993535875888817) internal successors, (13893), 4641 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 13893 transitions. [2021-06-05 15:42:14,636 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 13893 transitions. Word has length 42 [2021-06-05 15:42:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:14,636 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 13893 transitions. [2021-06-05 15:42:14,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 13893 transitions. [2021-06-05 15:42:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:14,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:14,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:14,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:42:14,845 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:14,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash 29300883, now seen corresponding path program 33 times [2021-06-05 15:42:14,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:14,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533205733] [2021-06-05 15:42:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:15,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:15,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533205733] [2021-06-05 15:42:15,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533205733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:15,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679172878] [2021-06-05 15:42:15,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:15,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:42:15,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:15,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:15,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:15,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:15,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:15,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:15,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:15,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:15,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:15,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:15,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:42:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:15,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679172878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:15,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:15,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469652689] [2021-06-05 15:42:15,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:15,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:15,415 INFO L87 Difference]: Start difference. First operand 4642 states and 13893 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:16,505 INFO L93 Difference]: Finished difference Result 5549 states and 16152 transitions. [2021-06-05 15:42:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:42:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:16,512 INFO L225 Difference]: With dead ends: 5549 [2021-06-05 15:42:16,512 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 15:42:16,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:42:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 15:42:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4654. [2021-06-05 15:42:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4653 states have (on average 2.995486782720825) internal successors, (13938), 4653 states have internal predecessors, (13938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 13938 transitions. [2021-06-05 15:42:16,558 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 13938 transitions. Word has length 42 [2021-06-05 15:42:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:16,558 INFO L482 AbstractCegarLoop]: Abstraction has 4654 states and 13938 transitions. [2021-06-05 15:42:16,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 13938 transitions. [2021-06-05 15:42:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:16,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:16,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:16,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 15:42:16,762 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:16,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1519216847, now seen corresponding path program 34 times [2021-06-05 15:42:16,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:16,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574293212] [2021-06-05 15:42:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:16,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:16,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574293212] [2021-06-05 15:42:16,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574293212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:16,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289062183] [2021-06-05 15:42:16,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:16,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:16,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:17,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:17,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:17,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:17,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:17,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:17,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:17,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:17,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:17,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:17,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:17,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289062183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:17,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:17,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725428400] [2021-06-05 15:42:17,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:17,277 INFO L87 Difference]: Start difference. First operand 4654 states and 13938 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:18,347 INFO L93 Difference]: Finished difference Result 5720 states and 16752 transitions. [2021-06-05 15:42:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:42:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:18,354 INFO L225 Difference]: With dead ends: 5720 [2021-06-05 15:42:18,354 INFO L226 Difference]: Without dead ends: 5499 [2021-06-05 15:42:18,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:42:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2021-06-05 15:42:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 4658. [2021-06-05 15:42:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.9952759287094697) internal successors, (13949), 4657 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 13949 transitions. [2021-06-05 15:42:18,403 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 13949 transitions. Word has length 42 [2021-06-05 15:42:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:18,404 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 13949 transitions. [2021-06-05 15:42:18,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 13949 transitions. [2021-06-05 15:42:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:18,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:18,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:18,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:18,609 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1181650253, now seen corresponding path program 35 times [2021-06-05 15:42:18,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:18,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804995593] [2021-06-05 15:42:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:18,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:18,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804995593] [2021-06-05 15:42:18,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804995593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:18,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998498280] [2021-06-05 15:42:18,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:18,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:18,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:18,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:18,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:18,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:18,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:18,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:18,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:18,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:19,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:19,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:19,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:19,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998498280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:19,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:19,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 15:42:19,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076744406] [2021-06-05 15:42:19,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:42:19,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:42:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:19,167 INFO L87 Difference]: Start difference. First operand 4658 states and 13949 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:20,551 INFO L93 Difference]: Finished difference Result 6225 states and 18189 transitions. [2021-06-05 15:42:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:42:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:20,558 INFO L225 Difference]: With dead ends: 6225 [2021-06-05 15:42:20,558 INFO L226 Difference]: Without dead ends: 5937 [2021-06-05 15:42:20,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 973.3ms TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:42:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5937 states. [2021-06-05 15:42:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5937 to 4639. [2021-06-05 15:42:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.993100474342389) internal successors, (13882), 4638 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13882 transitions. [2021-06-05 15:42:20,606 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13882 transitions. Word has length 42 [2021-06-05 15:42:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:20,606 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13882 transitions. [2021-06-05 15:42:20,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13882 transitions. [2021-06-05 15:42:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:20,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:20,611 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:20,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:20,811 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1452358205, now seen corresponding path program 36 times [2021-06-05 15:42:20,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:20,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146879852] [2021-06-05 15:42:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:20,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:20,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146879852] [2021-06-05 15:42:20,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146879852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:20,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675010543] [2021-06-05 15:42:20,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:21,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:42:21,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:21,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:21,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:21,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:21,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:21,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:21,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:21,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:21,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:21,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:21,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:21,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:21,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675010543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:21,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:21,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:21,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776212863] [2021-06-05 15:42:21,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:21,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:21,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:21,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:21,322 INFO L87 Difference]: Start difference. First operand 4639 states and 13882 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:22,194 INFO L93 Difference]: Finished difference Result 5277 states and 15646 transitions. [2021-06-05 15:42:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:42:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:22,199 INFO L225 Difference]: With dead ends: 5277 [2021-06-05 15:42:22,199 INFO L226 Difference]: Without dead ends: 5056 [2021-06-05 15:42:22,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 726.7ms TimeCoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:42:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-06-05 15:42:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4659. [2021-06-05 15:42:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.9920566766852725) internal successors, (13937), 4658 states have internal predecessors, (13937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 13937 transitions. [2021-06-05 15:42:22,243 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 13937 transitions. Word has length 42 [2021-06-05 15:42:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:22,243 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 13937 transitions. [2021-06-05 15:42:22,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 13937 transitions. [2021-06-05 15:42:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:22,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:22,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:22,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:22,448 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1248508895, now seen corresponding path program 37 times [2021-06-05 15:42:22,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:22,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55439206] [2021-06-05 15:42:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:22,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:22,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55439206] [2021-06-05 15:42:22,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55439206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:22,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306180000] [2021-06-05 15:42:22,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:22,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:22,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:22,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:22,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:22,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:22,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:22,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:22,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:22,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:22,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:22,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306180000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:22,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:22,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:22,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097050560] [2021-06-05 15:42:22,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:22,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:22,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:22,953 INFO L87 Difference]: Start difference. First operand 4659 states and 13937 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:23,812 INFO L93 Difference]: Finished difference Result 5643 states and 16752 transitions. [2021-06-05 15:42:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:42:23,814 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:23,820 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 15:42:23,820 INFO L226 Difference]: Without dead ends: 5457 [2021-06-05 15:42:23,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:42:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2021-06-05 15:42:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 4655. [2021-06-05 15:42:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.9922647185217017) internal successors, (13926), 4654 states have internal predecessors, (13926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13926 transitions. [2021-06-05 15:42:23,867 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13926 transitions. Word has length 42 [2021-06-05 15:42:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:23,867 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13926 transitions. [2021-06-05 15:42:23,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13926 transitions. [2021-06-05 15:42:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:23,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:23,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:24,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 15:42:24,072 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash 231648287, now seen corresponding path program 38 times [2021-06-05 15:42:24,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:24,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437564395] [2021-06-05 15:42:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:24,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437564395] [2021-06-05 15:42:24,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437564395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853405984] [2021-06-05 15:42:24,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:24,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:24,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:24,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:42:24,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:24,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:24,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:24,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:24,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:24,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:24,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:24,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:24,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:24,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:24,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:24,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853405984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:24,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:24,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:24,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713275310] [2021-06-05 15:42:24,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:24,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:24,573 INFO L87 Difference]: Start difference. First operand 4655 states and 13926 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:25,469 INFO L93 Difference]: Finished difference Result 5534 states and 16442 transitions. [2021-06-05 15:42:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:42:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:25,475 INFO L225 Difference]: With dead ends: 5534 [2021-06-05 15:42:25,475 INFO L226 Difference]: Without dead ends: 5348 [2021-06-05 15:42:25,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:42:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2021-06-05 15:42:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4651. [2021-06-05 15:42:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.99247311827957) internal successors, (13915), 4650 states have internal predecessors, (13915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13915 transitions. [2021-06-05 15:42:25,522 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13915 transitions. Word has length 42 [2021-06-05 15:42:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:25,522 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13915 transitions. [2021-06-05 15:42:25,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13915 transitions. [2021-06-05 15:42:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:25,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:25,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:25,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:25,727 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1111569021, now seen corresponding path program 39 times [2021-06-05 15:42:25,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:25,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836541762] [2021-06-05 15:42:25,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:25,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836541762] [2021-06-05 15:42:25,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836541762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741358345] [2021-06-05 15:42:25,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:25,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:42:25,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:25,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:25,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:25,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:25,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:25,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:25,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:26,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:26,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:26,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:26,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:42:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741358345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:26,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:26,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664813393] [2021-06-05 15:42:26,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:26,214 INFO L87 Difference]: Start difference. First operand 4651 states and 13915 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:27,289 INFO L93 Difference]: Finished difference Result 5233 states and 15393 transitions. [2021-06-05 15:42:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:42:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:27,295 INFO L225 Difference]: With dead ends: 5233 [2021-06-05 15:42:27,295 INFO L226 Difference]: Without dead ends: 5012 [2021-06-05 15:42:27,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:42:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-06-05 15:42:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4663. [2021-06-05 15:42:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.9944229944229943) internal successors, (13960), 4662 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13960 transitions. [2021-06-05 15:42:27,356 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13960 transitions. Word has length 42 [2021-06-05 15:42:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:27,356 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13960 transitions. [2021-06-05 15:42:27,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13960 transitions. [2021-06-05 15:42:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:27,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:27,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:27,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:27,561 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash 378346943, now seen corresponding path program 40 times [2021-06-05 15:42:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:27,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004974155] [2021-06-05 15:42:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:27,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:27,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004974155] [2021-06-05 15:42:27,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004974155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:27,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670859737] [2021-06-05 15:42:27,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:27,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:27,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:27,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:27,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:27,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:27,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:27,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:27,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:27,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:27,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:28,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670859737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:28,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:28,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:28,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878921604] [2021-06-05 15:42:28,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:28,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:28,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:28,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:28,067 INFO L87 Difference]: Start difference. First operand 4663 states and 13960 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:29,167 INFO L93 Difference]: Finished difference Result 5695 states and 16689 transitions. [2021-06-05 15:42:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:42:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:29,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:29,173 INFO L225 Difference]: With dead ends: 5695 [2021-06-05 15:42:29,173 INFO L226 Difference]: Without dead ends: 5474 [2021-06-05 15:42:29,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 812.1ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:42:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2021-06-05 15:42:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 4667. [2021-06-05 15:42:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.994213459065581) internal successors, (13971), 4666 states have internal predecessors, (13971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 13971 transitions. [2021-06-05 15:42:29,221 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 13971 transitions. Word has length 42 [2021-06-05 15:42:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:29,221 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 13971 transitions. [2021-06-05 15:42:29,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 13971 transitions. [2021-06-05 15:42:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:29,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:29,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:29,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:42:29,425 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1972447139, now seen corresponding path program 41 times [2021-06-05 15:42:29,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:29,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462449247] [2021-06-05 15:42:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:29,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:29,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462449247] [2021-06-05 15:42:29,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462449247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:29,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730448644] [2021-06-05 15:42:29,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:29,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:29,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:29,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:29,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:29,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:29,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:29,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:29,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:29,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:29,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:29,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:29,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:29,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:29,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730448644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:29,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:29,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 15:42:29,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309336201] [2021-06-05 15:42:29,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:42:29,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:42:29,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:42:29,977 INFO L87 Difference]: Start difference. First operand 4667 states and 13971 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:31,383 INFO L93 Difference]: Finished difference Result 6156 states and 17997 transitions. [2021-06-05 15:42:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:42:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:31,389 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 15:42:31,389 INFO L226 Difference]: Without dead ends: 5868 [2021-06-05 15:42:31,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1004.6ms TimeCoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:42:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2021-06-05 15:42:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 4636. [2021-06-05 15:42:31,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 15:42:31,441 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 15:42:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:31,442 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 15:42:31,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 15:42:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:31,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:31,446 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:31,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 15:42:31,646 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:31,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:31,646 INFO L82 PathProgramCache]: Analyzing trace with hash -324907291, now seen corresponding path program 42 times [2021-06-05 15:42:31,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:31,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871462142] [2021-06-05 15:42:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:31,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:31,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871462142] [2021-06-05 15:42:31,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871462142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:31,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350674810] [2021-06-05 15:42:31,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:31,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:42:31,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:31,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:42:31,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:31,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:31,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:31,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:31,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:31,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:32,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:32,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:32,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:32,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:32,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:32,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350674810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:32,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:32,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:32,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810977] [2021-06-05 15:42:32,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:32,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:32,113 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:33,026 INFO L93 Difference]: Finished difference Result 5469 states and 15943 transitions. [2021-06-05 15:42:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:42:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:33,032 INFO L225 Difference]: With dead ends: 5469 [2021-06-05 15:42:33,032 INFO L226 Difference]: Without dead ends: 5248 [2021-06-05 15:42:33,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 712.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:42:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-06-05 15:42:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 4639. [2021-06-05 15:42:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.99374730487279) internal successors, (13885), 4638 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13885 transitions. [2021-06-05 15:42:33,080 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13885 transitions. Word has length 42 [2021-06-05 15:42:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:33,080 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13885 transitions. [2021-06-05 15:42:33,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13885 transitions. [2021-06-05 15:42:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:33,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:33,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:33,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:42:33,284 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash 744443259, now seen corresponding path program 43 times [2021-06-05 15:42:33,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:33,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624747027] [2021-06-05 15:42:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:33,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:33,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624747027] [2021-06-05 15:42:33,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624747027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:33,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379771703] [2021-06-05 15:42:33,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:33,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:33,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:33,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:33,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:33,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:33,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:33,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:33,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:33,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:33,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379771703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:33,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:33,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:33,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913773664] [2021-06-05 15:42:33,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:33,763 INFO L87 Difference]: Start difference. First operand 4639 states and 13885 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:34,874 INFO L93 Difference]: Finished difference Result 5756 states and 16705 transitions. [2021-06-05 15:42:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:42:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:34,881 INFO L225 Difference]: With dead ends: 5756 [2021-06-05 15:42:34,881 INFO L226 Difference]: Without dead ends: 5535 [2021-06-05 15:42:34,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:42:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-06-05 15:42:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4651. [2021-06-05 15:42:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9956989247311827) internal successors, (13930), 4650 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13930 transitions. [2021-06-05 15:42:34,931 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13930 transitions. Word has length 42 [2021-06-05 15:42:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:34,931 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13930 transitions. [2021-06-05 15:42:34,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13930 transitions. [2021-06-05 15:42:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:34,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:34,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:35,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:35,141 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2060608073, now seen corresponding path program 44 times [2021-06-05 15:42:35,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:35,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516569667] [2021-06-05 15:42:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:35,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516569667] [2021-06-05 15:42:35,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516569667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763225732] [2021-06-05 15:42:35,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:35,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:35,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:35,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:35,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:35,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:35,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:35,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:35,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:35,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:35,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763225732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:35,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:35,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:35,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305063685] [2021-06-05 15:42:35,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:35,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:35,636 INFO L87 Difference]: Start difference. First operand 4651 states and 13930 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:36,871 INFO L93 Difference]: Finished difference Result 5951 states and 17366 transitions. [2021-06-05 15:42:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:42:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:36,878 INFO L225 Difference]: With dead ends: 5951 [2021-06-05 15:42:36,878 INFO L226 Difference]: Without dead ends: 5730 [2021-06-05 15:42:36,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 841.1ms TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:42:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-06-05 15:42:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 4655. [2021-06-05 15:42:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.995487752470993) internal successors, (13941), 4654 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13941 transitions. [2021-06-05 15:42:36,926 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13941 transitions. Word has length 42 [2021-06-05 15:42:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:36,926 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13941 transitions. [2021-06-05 15:42:36,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13941 transitions. [2021-06-05 15:42:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:36,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:36,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:37,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:37,131 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:37,131 INFO L82 PathProgramCache]: Analyzing trace with hash -466507877, now seen corresponding path program 45 times [2021-06-05 15:42:37,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:37,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906688776] [2021-06-05 15:42:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:37,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906688776] [2021-06-05 15:42:37,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906688776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376421746] [2021-06-05 15:42:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:37,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:42:37,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:37,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:42:37,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:37,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:37,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:37,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:37,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:37,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:37,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:37,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:37,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:37,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:37,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:37,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376421746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:37,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:37,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:37,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692310694] [2021-06-05 15:42:37,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:37,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:37,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:37,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:37,594 INFO L87 Difference]: Start difference. First operand 4655 states and 13941 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:38,707 INFO L93 Difference]: Finished difference Result 6545 states and 19010 transitions. [2021-06-05 15:42:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:42:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:38,714 INFO L225 Difference]: With dead ends: 6545 [2021-06-05 15:42:38,714 INFO L226 Difference]: Without dead ends: 6359 [2021-06-05 15:42:38,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 839.2ms TimeCoverageRelationStatistics Valid=239, Invalid=2311, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:42:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6359 states. [2021-06-05 15:42:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6359 to 4636. [2021-06-05 15:42:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 15:42:38,766 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 15:42:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:38,766 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 15:42:38,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 15:42:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:38,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:38,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:38,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 15:42:38,970 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1579224163, now seen corresponding path program 46 times [2021-06-05 15:42:38,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:38,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483391395] [2021-06-05 15:42:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:39,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483391395] [2021-06-05 15:42:39,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483391395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053810543] [2021-06-05 15:42:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:39,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:39,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:39,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:39,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:39,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:39,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:39,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:39,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:39,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:39,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:39,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:39,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:39,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053810543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:39,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:39,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:42:39,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80184028] [2021-06-05 15:42:39,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:42:39,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:39,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:42:39,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:39,420 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:40,222 INFO L93 Difference]: Finished difference Result 5213 states and 15315 transitions. [2021-06-05 15:42:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:42:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:40,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:40,228 INFO L225 Difference]: With dead ends: 5213 [2021-06-05 15:42:40,228 INFO L226 Difference]: Without dead ends: 4992 [2021-06-05 15:42:40,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:42:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-06-05 15:42:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 4636. [2021-06-05 15:42:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 15:42:40,287 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 15:42:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:40,287 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 15:42:40,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 15:42:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:40,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:40,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:40,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:40,492 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1491292073, now seen corresponding path program 47 times [2021-06-05 15:42:40,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:40,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685166853] [2021-06-05 15:42:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:40,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685166853] [2021-06-05 15:42:40,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685166853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132999626] [2021-06-05 15:42:40,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:40,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:42:40,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:42:40,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:40,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:40,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:40,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:40,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:40,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:40,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:40,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:40,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:40,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:40,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 15:42:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:40,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132999626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:40,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:40,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 15:42:40,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89395750] [2021-06-05 15:42:40,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:42:40,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:40,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:42:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:42:40,916 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:41,659 INFO L93 Difference]: Finished difference Result 5470 states and 15956 transitions. [2021-06-05 15:42:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:42:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:41,664 INFO L225 Difference]: With dead ends: 5470 [2021-06-05 15:42:41,664 INFO L226 Difference]: Without dead ends: 5249 [2021-06-05 15:42:41,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 597.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:42:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-06-05 15:42:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 4629. [2021-06-05 15:42:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.993733794295592) internal successors, (13855), 4628 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13855 transitions. [2021-06-05 15:42:41,709 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13855 transitions. Word has length 42 [2021-06-05 15:42:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:41,710 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 13855 transitions. [2021-06-05 15:42:41,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13855 transitions. [2021-06-05 15:42:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:41,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:41,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:41,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 15:42:41,922 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash 785232515, now seen corresponding path program 48 times [2021-06-05 15:42:41,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:41,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796224118] [2021-06-05 15:42:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:42,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796224118] [2021-06-05 15:42:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796224118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406345950] [2021-06-05 15:42:42,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:42,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:42:42,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:42,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:42,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:42,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:42,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:42,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:42,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:42,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:42,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:42,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:42,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:42:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:42,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406345950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:42,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:42,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:42,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549138650] [2021-06-05 15:42:42,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:42,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:42,372 INFO L87 Difference]: Start difference. First operand 4629 states and 13855 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:43,442 INFO L93 Difference]: Finished difference Result 5915 states and 17168 transitions. [2021-06-05 15:42:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:42:43,442 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:43,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:43,448 INFO L225 Difference]: With dead ends: 5915 [2021-06-05 15:42:43,448 INFO L226 Difference]: Without dead ends: 5694 [2021-06-05 15:42:43,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 726.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:42:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-06-05 15:42:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 4649. [2021-06-05 15:42:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.996987951807229) internal successors, (13930), 4648 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13930 transitions. [2021-06-05 15:42:43,494 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13930 transitions. Word has length 42 [2021-06-05 15:42:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:43,494 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13930 transitions. [2021-06-05 15:42:43,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13930 transitions. [2021-06-05 15:42:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:43,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:43,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:43,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:42:43,699 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:43,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2019818817, now seen corresponding path program 49 times [2021-06-05 15:42:43,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:43,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075653466] [2021-06-05 15:42:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:43,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075653466] [2021-06-05 15:42:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075653466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:43,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587147699] [2021-06-05 15:42:43,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:43,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:43,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:43,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:43,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:43,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:43,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:43,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:44,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:44,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:44,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:44,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:44,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587147699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:44,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:44,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:44,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140554027] [2021-06-05 15:42:44,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:44,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:44,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:44,197 INFO L87 Difference]: Start difference. First operand 4649 states and 13930 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:45,152 INFO L93 Difference]: Finished difference Result 6319 states and 18331 transitions. [2021-06-05 15:42:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:42:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:45,159 INFO L225 Difference]: With dead ends: 6319 [2021-06-05 15:42:45,159 INFO L226 Difference]: Without dead ends: 6098 [2021-06-05 15:42:45,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:42:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6098 states. [2021-06-05 15:42:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 4653. [2021-06-05 15:42:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.996775580395529) internal successors, (13941), 4652 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13941 transitions. [2021-06-05 15:42:45,207 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13941 transitions. Word has length 42 [2021-06-05 15:42:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:45,208 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 13941 transitions. [2021-06-05 15:42:45,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13941 transitions. [2021-06-05 15:42:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:45,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:45,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:45,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:42:45,412 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash -425718621, now seen corresponding path program 50 times [2021-06-05 15:42:45,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:45,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937723026] [2021-06-05 15:42:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:45,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:45,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937723026] [2021-06-05 15:42:45,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937723026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:45,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068414516] [2021-06-05 15:42:45,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:45,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:45,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:42:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:45,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:45,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:45,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:45,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:45,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:45,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:45,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:45,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:45,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:45,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068414516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:45,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:45,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:45,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218701495] [2021-06-05 15:42:45,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:45,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:45,892 INFO L87 Difference]: Start difference. First operand 4653 states and 13941 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:46,978 INFO L93 Difference]: Finished difference Result 6961 states and 20115 transitions. [2021-06-05 15:42:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:42:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:46,986 INFO L225 Difference]: With dead ends: 6961 [2021-06-05 15:42:46,986 INFO L226 Difference]: Without dead ends: 6775 [2021-06-05 15:42:46,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 779.3ms TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:42:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2021-06-05 15:42:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 4637. [2021-06-05 15:42:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.9950388265746333) internal successors, (13885), 4636 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13885 transitions. [2021-06-05 15:42:47,038 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13885 transitions. Word has length 42 [2021-06-05 15:42:47,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:47,038 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13885 transitions. [2021-06-05 15:42:47,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13885 transitions. [2021-06-05 15:42:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:47,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:47,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:47,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:42:47,242 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash -538817211, now seen corresponding path program 51 times [2021-06-05 15:42:47,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:47,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748551776] [2021-06-05 15:42:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:47,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:47,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748551776] [2021-06-05 15:42:47,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748551776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:47,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811844757] [2021-06-05 15:42:47,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:47,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:42:47,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:42:47,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:47,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:47,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:47,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:47,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:47,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:47,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811844757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:47,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:47,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 15:42:47,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146596547] [2021-06-05 15:42:47,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:42:47,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:42:47,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:42:47,700 INFO L87 Difference]: Start difference. First operand 4637 states and 13885 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:48,670 INFO L93 Difference]: Finished difference Result 5846 states and 16961 transitions. [2021-06-05 15:42:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:42:48,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:48,676 INFO L225 Difference]: With dead ends: 5846 [2021-06-05 15:42:48,676 INFO L226 Difference]: Without dead ends: 5625 [2021-06-05 15:42:48,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:42:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5625 states. [2021-06-05 15:42:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5625 to 4627. [2021-06-05 15:42:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-06-05 15:42:48,724 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-06-05 15:42:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:48,724 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-06-05 15:42:48,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-06-05 15:42:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:48,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:48,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:48,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:48,937 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1578142155, now seen corresponding path program 52 times [2021-06-05 15:42:48,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:48,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261789778] [2021-06-05 15:42:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:49,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:49,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261789778] [2021-06-05 15:42:49,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261789778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:49,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474163359] [2021-06-05 15:42:49,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:49,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:49,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:49,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:49,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:49,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:49,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:49,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:49,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:49,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:49,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:49,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:49,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:49,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474163359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:49,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:49,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:49,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772118183] [2021-06-05 15:42:49,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:49,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:49,435 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:50,242 INFO L93 Difference]: Finished difference Result 5265 states and 15611 transitions. [2021-06-05 15:42:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:42:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:50,247 INFO L225 Difference]: With dead ends: 5265 [2021-06-05 15:42:50,248 INFO L226 Difference]: Without dead ends: 5044 [2021-06-05 15:42:50,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 744.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:42:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2021-06-05 15:42:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 4647. [2021-06-05 15:42:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4646 states have (on average 2.992251399052949) internal successors, (13902), 4646 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 13902 transitions. [2021-06-05 15:42:50,292 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 13902 transitions. Word has length 42 [2021-06-05 15:42:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:50,292 INFO L482 AbstractCegarLoop]: Abstraction has 4647 states and 13902 transitions. [2021-06-05 15:42:50,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 13902 transitions. [2021-06-05 15:42:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:50,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:50,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:50,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:42:50,497 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash 15958041, now seen corresponding path program 53 times [2021-06-05 15:42:50,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:50,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942135470] [2021-06-05 15:42:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:50,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:50,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942135470] [2021-06-05 15:42:50,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942135470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:50,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396225319] [2021-06-05 15:42:50,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:50,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:50,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:50,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:50,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:50,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:50,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:50,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:50,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:50,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:50,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:51,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396225319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:51,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:51,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:51,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114567091] [2021-06-05 15:42:51,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:51,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:51,005 INFO L87 Difference]: Start difference. First operand 4647 states and 13902 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:51,841 INFO L93 Difference]: Finished difference Result 5631 states and 16717 transitions. [2021-06-05 15:42:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:42:51,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:51,847 INFO L225 Difference]: With dead ends: 5631 [2021-06-05 15:42:51,847 INFO L226 Difference]: Without dead ends: 5445 [2021-06-05 15:42:51,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 740.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:42:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-06-05 15:42:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 4643. [2021-06-05 15:42:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9924601464885825) internal successors, (13891), 4642 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13891 transitions. [2021-06-05 15:42:51,895 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13891 transitions. Word has length 42 [2021-06-05 15:42:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:51,895 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 13891 transitions. [2021-06-05 15:42:51,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13891 transitions. [2021-06-05 15:42:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:51,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:51,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:52,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:52,113 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1496115223, now seen corresponding path program 54 times [2021-06-05 15:42:52,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:52,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257606684] [2021-06-05 15:42:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:52,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:52,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257606684] [2021-06-05 15:42:52,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257606684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:52,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832354646] [2021-06-05 15:42:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:52,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:42:52,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:42:52,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:52,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:52,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:52,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:52,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:52,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:52,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:52,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:52,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:52,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:52,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:52,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832354646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:52,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:52,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791911766] [2021-06-05 15:42:52,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:52,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:52,610 INFO L87 Difference]: Start difference. First operand 4643 states and 13891 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:53,476 INFO L93 Difference]: Finished difference Result 5522 states and 16407 transitions. [2021-06-05 15:42:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:42:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:53,481 INFO L225 Difference]: With dead ends: 5522 [2021-06-05 15:42:53,481 INFO L226 Difference]: Without dead ends: 5336 [2021-06-05 15:42:53,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:42:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-06-05 15:42:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4639. [2021-06-05 15:42:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.9926692539887885) internal successors, (13880), 4638 states have internal predecessors, (13880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13880 transitions. [2021-06-05 15:42:53,527 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13880 transitions. Word has length 42 [2021-06-05 15:42:53,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:53,527 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13880 transitions. [2021-06-05 15:42:53,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13880 transitions. [2021-06-05 15:42:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:53,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:53,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:53,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 15:42:53,733 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash 152897915, now seen corresponding path program 55 times [2021-06-05 15:42:53,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:53,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42108755] [2021-06-05 15:42:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:53,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42108755] [2021-06-05 15:42:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42108755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087847742] [2021-06-05 15:42:53,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:53,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:53,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:53,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:53,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:53,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:54,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:54,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:54,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:54,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:54,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:54,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087847742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:54,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:54,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:54,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143362687] [2021-06-05 15:42:54,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:54,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:54,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:54,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:54,212 INFO L87 Difference]: Start difference. First operand 4639 states and 13880 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:55,227 INFO L93 Difference]: Finished difference Result 5221 states and 15358 transitions. [2021-06-05 15:42:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:42:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:55,233 INFO L225 Difference]: With dead ends: 5221 [2021-06-05 15:42:55,233 INFO L226 Difference]: Without dead ends: 5000 [2021-06-05 15:42:55,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:42:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-06-05 15:42:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4651. [2021-06-05 15:42:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9946236559139785) internal successors, (13925), 4650 states have internal predecessors, (13925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13925 transitions. [2021-06-05 15:42:55,278 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13925 transitions. Word has length 42 [2021-06-05 15:42:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:55,278 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13925 transitions. [2021-06-05 15:42:55,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13925 transitions. [2021-06-05 15:42:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:55,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:55,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:55,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:55,483 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1642813879, now seen corresponding path program 56 times [2021-06-05 15:42:55,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:55,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537060562] [2021-06-05 15:42:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:55,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:55,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537060562] [2021-06-05 15:42:55,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537060562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:55,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719951608] [2021-06-05 15:42:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:55,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:55,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:55,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:55,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:55,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:55,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:55,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:55,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:55,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:55,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:55,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:55,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:55,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:56,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719951608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:56,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:56,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:56,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055574012] [2021-06-05 15:42:56,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:56,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:56,005 INFO L87 Difference]: Start difference. First operand 4651 states and 13925 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:57,077 INFO L93 Difference]: Finished difference Result 5683 states and 16654 transitions. [2021-06-05 15:42:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:42:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:57,083 INFO L225 Difference]: With dead ends: 5683 [2021-06-05 15:42:57,084 INFO L226 Difference]: Without dead ends: 5462 [2021-06-05 15:42:57,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 867.0ms TimeCoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:42:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-06-05 15:42:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 4655. [2021-06-05 15:42:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.994413407821229) internal successors, (13936), 4654 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13936 transitions. [2021-06-05 15:42:57,131 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13936 transitions. Word has length 42 [2021-06-05 15:42:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:57,131 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13936 transitions. [2021-06-05 15:42:57,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13936 transitions. [2021-06-05 15:42:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:57,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:57,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:57,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 15:42:57,336 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1058053221, now seen corresponding path program 57 times [2021-06-05 15:42:57,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:57,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514340868] [2021-06-05 15:42:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:57,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:57,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514340868] [2021-06-05 15:42:57,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514340868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:57,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560076886] [2021-06-05 15:42:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:57,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:42:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:57,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:42:57,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:57,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:42:57,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:57,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:57,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:57,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:42:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:57,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:57,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:57,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:57,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:57,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560076886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:57,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:57,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:57,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310002460] [2021-06-05 15:42:57,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:57,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:57,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:57,830 INFO L87 Difference]: Start difference. First operand 4655 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:59,153 INFO L93 Difference]: Finished difference Result 6077 states and 17816 transitions. [2021-06-05 15:42:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:42:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:42:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:59,160 INFO L225 Difference]: With dead ends: 6077 [2021-06-05 15:42:59,160 INFO L226 Difference]: Without dead ends: 5891 [2021-06-05 15:42:59,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 923.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:42:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2021-06-05 15:42:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 4627. [2021-06-05 15:42:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-06-05 15:42:59,208 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-06-05 15:42:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:59,208 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-06-05 15:42:59,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-06-05 15:42:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:42:59,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:59,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:42:59,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:59,413 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -793864301, now seen corresponding path program 58 times [2021-06-05 15:42:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:59,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718640182] [2021-06-05 15:42:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:42:59,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718640182] [2021-06-05 15:42:59,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718640182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873588756] [2021-06-05 15:42:59,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:59,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:42:59,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:42:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:59,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:59,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:59,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:59,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:59,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:42:59,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:42:59,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:59,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:59,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:42:59,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:42:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:42:59,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873588756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:59,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:59,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:42:59,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921843702] [2021-06-05 15:42:59,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:42:59,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:42:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:42:59,894 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:01,034 INFO L93 Difference]: Finished difference Result 5890 states and 17085 transitions. [2021-06-05 15:43:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:43:01,034 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:01,057 INFO L225 Difference]: With dead ends: 5890 [2021-06-05 15:43:01,057 INFO L226 Difference]: Without dead ends: 5669 [2021-06-05 15:43:01,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 859.8ms TimeCoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:43:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2021-06-05 15:43:01,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 4639. [2021-06-05 15:43:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.995256576110392) internal successors, (13892), 4638 states have internal predecessors, (13892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13892 transitions. [2021-06-05 15:43:01,102 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13892 transitions. Word has length 42 [2021-06-05 15:43:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:01,102 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13892 transitions. [2021-06-05 15:43:01,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13892 transitions. [2021-06-05 15:43:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:01,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:01,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:01,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:43:01,306 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:01,307 INFO L82 PathProgramCache]: Analyzing trace with hash 696051663, now seen corresponding path program 59 times [2021-06-05 15:43:01,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:01,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576046419] [2021-06-05 15:43:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:01,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:01,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576046419] [2021-06-05 15:43:01,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576046419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:01,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054854795] [2021-06-05 15:43:01,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:01,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:01,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:01,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:01,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:01,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:01,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:01,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:01,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:01,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:01,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:01,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:43:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054854795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:01,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:01,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:01,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457656359] [2021-06-05 15:43:01,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:01,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:01,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:01,796 INFO L87 Difference]: Start difference. First operand 4639 states and 13892 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:03,009 INFO L93 Difference]: Finished difference Result 6190 states and 17997 transitions. [2021-06-05 15:43:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:43:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:03,016 INFO L225 Difference]: With dead ends: 6190 [2021-06-05 15:43:03,016 INFO L226 Difference]: Without dead ends: 5969 [2021-06-05 15:43:03,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 877.0ms TimeCoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:43:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-06-05 15:43:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 4643. [2021-06-05 15:43:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9950452391210685) internal successors, (13903), 4642 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13903 transitions. [2021-06-05 15:43:03,072 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13903 transitions. Word has length 42 [2021-06-05 15:43:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:03,072 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 13903 transitions. [2021-06-05 15:43:03,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13903 transitions. [2021-06-05 15:43:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:03,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:03,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:03,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:03,289 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2004815437, now seen corresponding path program 60 times [2021-06-05 15:43:03,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:03,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848863349] [2021-06-05 15:43:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:03,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:03,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848863349] [2021-06-05 15:43:03,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848863349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:03,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338104688] [2021-06-05 15:43:03,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:03,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:43:03,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:43:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:03,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:03,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:03,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:03,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:03,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:03,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:03,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:03,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:03,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:03,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:03,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338104688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:03,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:03,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:03,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970407840] [2021-06-05 15:43:03,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:03,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:03,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:03,805 INFO L87 Difference]: Start difference. First operand 4643 states and 13903 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:05,070 INFO L93 Difference]: Finished difference Result 6784 states and 19641 transitions. [2021-06-05 15:43:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:43:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:05,077 INFO L225 Difference]: With dead ends: 6784 [2021-06-05 15:43:05,078 INFO L226 Difference]: Without dead ends: 6598 [2021-06-05 15:43:05,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 964.6ms TimeCoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:43:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-06-05 15:43:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 4627. [2021-06-05 15:43:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-06-05 15:43:05,129 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-06-05 15:43:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:05,129 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-06-05 15:43:05,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-06-05 15:43:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:05,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:05,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:05,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:43:05,333 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:05,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2117914027, now seen corresponding path program 61 times [2021-06-05 15:43:05,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:05,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606964810] [2021-06-05 15:43:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:05,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:05,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606964810] [2021-06-05 15:43:05,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606964810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:05,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887342969] [2021-06-05 15:43:05,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:05,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:05,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:05,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:05,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:05,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:05,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:05,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:05,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:05,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:05,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:05,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887342969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:05,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:05,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:05,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21393463] [2021-06-05 15:43:05,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:05,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:05,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:05,804 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:06,814 INFO L93 Difference]: Finished difference Result 5487 states and 16039 transitions. [2021-06-05 15:43:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:43:06,814 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:06,820 INFO L225 Difference]: With dead ends: 5487 [2021-06-05 15:43:06,820 INFO L226 Difference]: Without dead ends: 5266 [2021-06-05 15:43:06,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=247, Invalid=2203, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:43:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2021-06-05 15:43:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 4586. [2021-06-05 15:43:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994547437295529) internal successors, (13730), 4585 states have internal predecessors, (13730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13730 transitions. [2021-06-05 15:43:06,868 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13730 transitions. Word has length 42 [2021-06-05 15:43:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:06,868 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13730 transitions. [2021-06-05 15:43:06,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13730 transitions. [2021-06-05 15:43:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:06,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:06,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:07,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 15:43:07,073 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1514227655, now seen corresponding path program 62 times [2021-06-05 15:43:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:07,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985299531] [2021-06-05 15:43:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:07,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:07,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985299531] [2021-06-05 15:43:07,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985299531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:07,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806106130] [2021-06-05 15:43:07,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:07,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:07,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:07,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:07,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:07,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:07,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:07,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:07,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:07,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:07,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:07,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:07,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806106130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:07,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:07,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 15:43:07,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854242238] [2021-06-05 15:43:07,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:43:07,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:43:07,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:43:07,587 INFO L87 Difference]: Start difference. First operand 4586 states and 13730 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:08,425 INFO L93 Difference]: Finished difference Result 5807 states and 16947 transitions. [2021-06-05 15:43:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:43:08,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:08,431 INFO L225 Difference]: With dead ends: 5807 [2021-06-05 15:43:08,431 INFO L226 Difference]: Without dead ends: 5556 [2021-06-05 15:43:08,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:43:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-06-05 15:43:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 4622. [2021-06-05 15:43:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 4621 states have (on average 2.9939407054750053) internal successors, (13835), 4621 states have internal predecessors, (13835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 13835 transitions. [2021-06-05 15:43:08,479 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 13835 transitions. Word has length 42 [2021-06-05 15:43:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:08,480 INFO L482 AbstractCegarLoop]: Abstraction has 4622 states and 13835 transitions. [2021-06-05 15:43:08,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 13835 transitions. [2021-06-05 15:43:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:08,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:08,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:08,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 15:43:08,684 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:08,684 INFO L82 PathProgramCache]: Analyzing trace with hash 298955211, now seen corresponding path program 63 times [2021-06-05 15:43:08,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:08,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626645599] [2021-06-05 15:43:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:08,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626645599] [2021-06-05 15:43:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626645599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33420861] [2021-06-05 15:43:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:08,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:43:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:09,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:09,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:09,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:09,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:09,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:09,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:09,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:09,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:09,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:09,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:09,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33420861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:09,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:09,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:09,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198514406] [2021-06-05 15:43:09,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:09,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:09,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:09,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:09,207 INFO L87 Difference]: Start difference. First operand 4622 states and 13835 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:10,178 INFO L93 Difference]: Finished difference Result 6002 states and 17329 transitions. [2021-06-05 15:43:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:43:10,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:10,185 INFO L225 Difference]: With dead ends: 6002 [2021-06-05 15:43:10,185 INFO L226 Difference]: Without dead ends: 5781 [2021-06-05 15:43:10,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:43:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-06-05 15:43:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 4625. [2021-06-05 15:43:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.9943771626297577) internal successors, (13846), 4624 states have internal predecessors, (13846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13846 transitions. [2021-06-05 15:43:10,236 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13846 transitions. Word has length 42 [2021-06-05 15:43:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:10,236 INFO L482 AbstractCegarLoop]: Abstraction has 4625 states and 13846 transitions. [2021-06-05 15:43:10,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13846 transitions. [2021-06-05 15:43:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:10,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:10,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:10,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:10,441 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1368305761, now seen corresponding path program 64 times [2021-06-05 15:43:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:10,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101377041] [2021-06-05 15:43:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:10,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101377041] [2021-06-05 15:43:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101377041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282752538] [2021-06-05 15:43:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:10,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:10,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:10,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:10,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:10,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:10,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:10,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:10,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:10,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:10,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:10,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:10,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:10,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282752538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:10,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:10,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:10,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14695943] [2021-06-05 15:43:10,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:10,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:10,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:10,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:10,935 INFO L87 Difference]: Start difference. First operand 4625 states and 13846 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:12,085 INFO L93 Difference]: Finished difference Result 6284 states and 18100 transitions. [2021-06-05 15:43:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:43:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:12,091 INFO L225 Difference]: With dead ends: 6284 [2021-06-05 15:43:12,091 INFO L226 Difference]: Without dead ends: 6063 [2021-06-05 15:43:12,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:43:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-05 15:43:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4637. [2021-06-05 15:43:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.996333045729077) internal successors, (13891), 4636 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13891 transitions. [2021-06-05 15:43:12,141 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13891 transitions. Word has length 42 [2021-06-05 15:43:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:12,141 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13891 transitions. [2021-06-05 15:43:12,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13891 transitions. [2021-06-05 15:43:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:12,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:12,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:12,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:12,346 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1436745571, now seen corresponding path program 65 times [2021-06-05 15:43:12,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:12,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163143630] [2021-06-05 15:43:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:12,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:12,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163143630] [2021-06-05 15:43:12,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163143630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:12,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373033046] [2021-06-05 15:43:12,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:12,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:12,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:12,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:12,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:12,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:12,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:12,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:12,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:12,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:12,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:12,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:12,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:12,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:12,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373033046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:12,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:12,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 15:43:12,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400471857] [2021-06-05 15:43:12,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:43:12,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:43:12,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:43:12,882 INFO L87 Difference]: Start difference. First operand 4637 states and 13891 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:14,088 INFO L93 Difference]: Finished difference Result 6560 states and 18993 transitions. [2021-06-05 15:43:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:43:14,089 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:14,094 INFO L225 Difference]: With dead ends: 6560 [2021-06-05 15:43:14,095 INFO L226 Difference]: Without dead ends: 6339 [2021-06-05 15:43:14,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 901.2ms TimeCoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:43:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2021-06-05 15:43:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 4641. [2021-06-05 15:43:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9961206896551724) internal successors, (13902), 4640 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13902 transitions. [2021-06-05 15:43:14,144 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13902 transitions. Word has length 42 [2021-06-05 15:43:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:14,144 INFO L482 AbstractCegarLoop]: Abstraction has 4641 states and 13902 transitions. [2021-06-05 15:43:14,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13902 transitions. [2021-06-05 15:43:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:14,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:14,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:14,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:14,348 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash 157354625, now seen corresponding path program 66 times [2021-06-05 15:43:14,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:14,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370109563] [2021-06-05 15:43:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:14,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:14,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370109563] [2021-06-05 15:43:14,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370109563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:14,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913130985] [2021-06-05 15:43:14,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:14,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:43:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:43:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:14,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:14,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:14,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:14,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:14,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:14,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:14,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:14,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:14,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:14,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:14,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913130985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:14,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:14,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:14,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248119317] [2021-06-05 15:43:14,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:14,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:14,855 INFO L87 Difference]: Start difference. First operand 4641 states and 13902 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:16,188 INFO L93 Difference]: Finished difference Result 7255 states and 20991 transitions. [2021-06-05 15:43:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:43:16,188 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:16,196 INFO L225 Difference]: With dead ends: 7255 [2021-06-05 15:43:16,196 INFO L226 Difference]: Without dead ends: 7069 [2021-06-05 15:43:16,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 914.8ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:43:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2021-06-05 15:43:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 4610. [2021-06-05 15:43:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.992189195053157) internal successors, (13791), 4609 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13791 transitions. [2021-06-05 15:43:16,249 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13791 transitions. Word has length 42 [2021-06-05 15:43:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:16,249 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 13791 transitions. [2021-06-05 15:43:16,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13791 transitions. [2021-06-05 15:43:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:16,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:16,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:16,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 15:43:16,454 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1691017367, now seen corresponding path program 67 times [2021-06-05 15:43:16,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:16,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601999196] [2021-06-05 15:43:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:16,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:16,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601999196] [2021-06-05 15:43:16,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601999196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:16,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105409213] [2021-06-05 15:43:16,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:16,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:16,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:16,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:16,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:16,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:16,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:16,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:16,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:16,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:16,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:16,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105409213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:16,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:16,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:16,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339995017] [2021-06-05 15:43:16,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:16,977 INFO L87 Difference]: Start difference. First operand 4610 states and 13791 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:17,779 INFO L93 Difference]: Finished difference Result 5159 states and 15159 transitions. [2021-06-05 15:43:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:43:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:17,785 INFO L225 Difference]: With dead ends: 5159 [2021-06-05 15:43:17,785 INFO L226 Difference]: Without dead ends: 4938 [2021-06-05 15:43:17,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 740.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:43:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-06-05 15:43:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4616. [2021-06-05 15:43:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9924160346695556) internal successors, (13810), 4615 states have internal predecessors, (13810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13810 transitions. [2021-06-05 15:43:17,835 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13810 transitions. Word has length 42 [2021-06-05 15:43:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:17,835 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13810 transitions. [2021-06-05 15:43:17,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13810 transitions. [2021-06-05 15:43:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:17,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:17,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:18,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:18,040 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:18,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1534599379, now seen corresponding path program 68 times [2021-06-05 15:43:18,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:18,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608594837] [2021-06-05 15:43:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:18,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:18,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608594837] [2021-06-05 15:43:18,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608594837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:18,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29581803] [2021-06-05 15:43:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:18,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:18,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:18,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:18,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:18,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:18,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:18,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:18,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:18,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:18,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:18,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:18,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:18,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:43:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:18,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29581803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:18,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:18,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:18,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199445545] [2021-06-05 15:43:18,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:18,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:18,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:18,533 INFO L87 Difference]: Start difference. First operand 4616 states and 13810 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:19,627 INFO L93 Difference]: Finished difference Result 5523 states and 16069 transitions. [2021-06-05 15:43:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:43:19,628 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:19,633 INFO L225 Difference]: With dead ends: 5523 [2021-06-05 15:43:19,633 INFO L226 Difference]: Without dead ends: 5302 [2021-06-05 15:43:19,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-06-05 15:43:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 4628. [2021-06-05 15:43:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.994380808299114) internal successors, (13855), 4627 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13855 transitions. [2021-06-05 15:43:19,680 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13855 transitions. Word has length 42 [2021-06-05 15:43:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:19,680 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13855 transitions. [2021-06-05 15:43:19,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13855 transitions. [2021-06-05 15:43:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:19,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:19,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:19,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:19,885 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash -44683415, now seen corresponding path program 69 times [2021-06-05 15:43:19,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:19,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625803194] [2021-06-05 15:43:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:20,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625803194] [2021-06-05 15:43:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625803194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545978587] [2021-06-05 15:43:20,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:20,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:43:20,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:20,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:20,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:20,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:20,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:20,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:20,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:20,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:20,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:20,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:20,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:20,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545978587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:20,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:20,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:20,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059683320] [2021-06-05 15:43:20,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:20,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:20,379 INFO L87 Difference]: Start difference. First operand 4628 states and 13855 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:21,401 INFO L93 Difference]: Finished difference Result 5694 states and 16669 transitions. [2021-06-05 15:43:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:43:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:21,407 INFO L225 Difference]: With dead ends: 5694 [2021-06-05 15:43:21,407 INFO L226 Difference]: Without dead ends: 5473 [2021-06-05 15:43:21,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-06-05 15:43:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4632. [2021-06-05 15:43:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 2.9941697257611746) internal successors, (13866), 4631 states have internal predecessors, (13866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 13866 transitions. [2021-06-05 15:43:21,455 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 13866 transitions. Word has length 42 [2021-06-05 15:43:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:21,455 INFO L482 AbstractCegarLoop]: Abstraction has 4632 states and 13866 transitions. [2021-06-05 15:43:21,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 13866 transitions. [2021-06-05 15:43:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:21,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:21,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:21,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:21,660 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1549416781, now seen corresponding path program 70 times [2021-06-05 15:43:21,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:21,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061093852] [2021-06-05 15:43:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:21,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:21,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061093852] [2021-06-05 15:43:21,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061093852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:21,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601864689] [2021-06-05 15:43:21,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:21,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:21,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:21,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:21,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:21,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:21,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:21,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:21,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:22,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:22,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:22,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:22,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:22,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601864689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:22,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:22,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:22,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276193023] [2021-06-05 15:43:22,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:22,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:22,180 INFO L87 Difference]: Start difference. First operand 4632 states and 13866 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:23,294 INFO L93 Difference]: Finished difference Result 6132 states and 17960 transitions. [2021-06-05 15:43:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:43:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:23,300 INFO L225 Difference]: With dead ends: 6132 [2021-06-05 15:43:23,300 INFO L226 Difference]: Without dead ends: 5946 [2021-06-05 15:43:23,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 855.8ms TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:43:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2021-06-05 15:43:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 4613. [2021-06-05 15:43:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.9919774501300953) internal successors, (13799), 4612 states have internal predecessors, (13799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13799 transitions. [2021-06-05 15:43:23,350 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13799 transitions. Word has length 42 [2021-06-05 15:43:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:23,350 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 13799 transitions. [2021-06-05 15:43:23,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13799 transitions. [2021-06-05 15:43:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:23,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:23,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:23,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 15:43:23,555 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:23,555 INFO L82 PathProgramCache]: Analyzing trace with hash -111542057, now seen corresponding path program 71 times [2021-06-05 15:43:23,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:23,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233559283] [2021-06-05 15:43:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:23,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:23,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233559283] [2021-06-05 15:43:23,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233559283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:23,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682492118] [2021-06-05 15:43:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:23,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:23,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:23,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:23,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:23,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:23,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:23,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:23,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:23,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:23,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:23,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:23,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:23,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:24,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682492118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:24,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:24,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:24,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184645758] [2021-06-05 15:43:24,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:24,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:24,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:24,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:24,045 INFO L87 Difference]: Start difference. First operand 4613 states and 13799 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:24,875 INFO L93 Difference]: Finished difference Result 5251 states and 15563 transitions. [2021-06-05 15:43:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:43:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:24,881 INFO L225 Difference]: With dead ends: 5251 [2021-06-05 15:43:24,881 INFO L226 Difference]: Without dead ends: 5030 [2021-06-05 15:43:24,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:43:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2021-06-05 15:43:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 4633. [2021-06-05 15:43:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4632 states have (on average 2.9909326424870466) internal successors, (13854), 4632 states have internal predecessors, (13854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 13854 transitions. [2021-06-05 15:43:24,925 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 13854 transitions. Word has length 42 [2021-06-05 15:43:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:24,926 INFO L482 AbstractCegarLoop]: Abstraction has 4633 states and 13854 transitions. [2021-06-05 15:43:24,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 13854 transitions. [2021-06-05 15:43:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:24,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:24,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:25,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:25,130 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1482558139, now seen corresponding path program 72 times [2021-06-05 15:43:25,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:25,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108334229] [2021-06-05 15:43:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:25,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:25,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108334229] [2021-06-05 15:43:25,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108334229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:25,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49578913] [2021-06-05 15:43:25,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:25,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:43:25,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:43:25,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:25,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:25,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:25,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:25,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:25,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:25,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:25,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:25,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:25,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:25,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49578913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:25,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:25,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:25,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347155137] [2021-06-05 15:43:25,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:25,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:25,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:25,635 INFO L87 Difference]: Start difference. First operand 4633 states and 13854 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:26,458 INFO L93 Difference]: Finished difference Result 5617 states and 16669 transitions. [2021-06-05 15:43:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:43:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:26,464 INFO L225 Difference]: With dead ends: 5617 [2021-06-05 15:43:26,465 INFO L226 Difference]: Without dead ends: 5431 [2021-06-05 15:43:26,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 744.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:43:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-06-05 15:43:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4629. [2021-06-05 15:43:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.99114088159032) internal successors, (13843), 4628 states have internal predecessors, (13843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13843 transitions. [2021-06-05 15:43:26,512 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13843 transitions. Word has length 42 [2021-06-05 15:43:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:26,512 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 13843 transitions. [2021-06-05 15:43:26,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13843 transitions. [2021-06-05 15:43:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:26,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:26,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:26,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 15:43:26,717 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1332251975, now seen corresponding path program 73 times [2021-06-05 15:43:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:26,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039297793] [2021-06-05 15:43:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:26,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:26,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039297793] [2021-06-05 15:43:26,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039297793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:26,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490830004] [2021-06-05 15:43:26,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:27,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:27,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:27,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:27,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:27,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:27,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:27,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:27,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:27,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:27,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490830004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:27,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:27,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530292069] [2021-06-05 15:43:27,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:27,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:27,234 INFO L87 Difference]: Start difference. First operand 4629 states and 13843 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:28,054 INFO L93 Difference]: Finished difference Result 5508 states and 16359 transitions. [2021-06-05 15:43:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:43:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:28,060 INFO L225 Difference]: With dead ends: 5508 [2021-06-05 15:43:28,060 INFO L226 Difference]: Without dead ends: 5322 [2021-06-05 15:43:28,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 761.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:43:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2021-06-05 15:43:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 4625. [2021-06-05 15:43:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.991349480968858) internal successors, (13832), 4624 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13832 transitions. [2021-06-05 15:43:28,107 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13832 transitions. Word has length 42 [2021-06-05 15:43:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:28,107 INFO L482 AbstractCegarLoop]: Abstraction has 4625 states and 13832 transitions. [2021-06-05 15:43:28,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13832 transitions. [2021-06-05 15:43:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:28,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:28,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:28,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:28,311 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1619498013, now seen corresponding path program 74 times [2021-06-05 15:43:28,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:28,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107975930] [2021-06-05 15:43:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:28,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:28,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107975930] [2021-06-05 15:43:28,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107975930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:28,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271013688] [2021-06-05 15:43:28,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:28,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:28,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:28,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:28,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:28,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:28,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:28,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:28,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:28,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:28,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:28,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:43:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:28,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271013688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:28,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:28,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:28,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074949117] [2021-06-05 15:43:28,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:28,818 INFO L87 Difference]: Start difference. First operand 4625 states and 13832 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:29,886 INFO L93 Difference]: Finished difference Result 5207 states and 15310 transitions. [2021-06-05 15:43:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:43:29,886 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:29,891 INFO L225 Difference]: With dead ends: 5207 [2021-06-05 15:43:29,891 INFO L226 Difference]: Without dead ends: 4986 [2021-06-05 15:43:29,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 821.6ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2021-06-05 15:43:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 4637. [2021-06-05 15:43:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.993313201035375) internal successors, (13877), 4636 states have internal predecessors, (13877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13877 transitions. [2021-06-05 15:43:29,936 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13877 transitions. Word has length 42 [2021-06-05 15:43:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:29,937 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13877 transitions. [2021-06-05 15:43:29,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13877 transitions. [2021-06-05 15:43:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:29,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:29,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:30,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:30,141 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1185553319, now seen corresponding path program 75 times [2021-06-05 15:43:30,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:30,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097146896] [2021-06-05 15:43:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:30,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097146896] [2021-06-05 15:43:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097146896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293472792] [2021-06-05 15:43:30,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:30,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:43:30,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:30,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:30,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:30,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:30,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:30,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:30,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:30,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:30,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:30,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:30,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:30,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:30,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293472792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:30,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:30,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:30,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820263086] [2021-06-05 15:43:30,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:30,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:30,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:30,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:30,628 INFO L87 Difference]: Start difference. First operand 4637 states and 13877 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:31,670 INFO L93 Difference]: Finished difference Result 5669 states and 16606 transitions. [2021-06-05 15:43:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:43:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:31,676 INFO L225 Difference]: With dead ends: 5669 [2021-06-05 15:43:31,676 INFO L226 Difference]: Without dead ends: 5448 [2021-06-05 15:43:31,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 812.3ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2021-06-05 15:43:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4641. [2021-06-05 15:43:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9931034482758623) internal successors, (13888), 4640 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13888 transitions. [2021-06-05 15:43:31,722 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13888 transitions. Word has length 42 [2021-06-05 15:43:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:31,722 INFO L482 AbstractCegarLoop]: Abstraction has 4641 states and 13888 transitions. [2021-06-05 15:43:31,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13888 transitions. [2021-06-05 15:43:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:31,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:31,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:31,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:31,927 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:31,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash 408546877, now seen corresponding path program 76 times [2021-06-05 15:43:31,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:31,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141793731] [2021-06-05 15:43:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:32,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:32,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141793731] [2021-06-05 15:43:32,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141793731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:32,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881519593] [2021-06-05 15:43:32,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:32,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:32,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:32,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:32,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:32,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:32,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:32,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:32,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:32,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:32,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:32,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:32,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:32,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881519593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:32,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:32,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:32,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358403930] [2021-06-05 15:43:32,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:32,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:32,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:32,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:32,433 INFO L87 Difference]: Start difference. First operand 4641 states and 13888 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:33,626 INFO L93 Difference]: Finished difference Result 6063 states and 17768 transitions. [2021-06-05 15:43:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:43:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:33,633 INFO L225 Difference]: With dead ends: 6063 [2021-06-05 15:43:33,633 INFO L226 Difference]: Without dead ends: 5877 [2021-06-05 15:43:33,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 876.3ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:43:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-06-05 15:43:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 4598. [2021-06-05 15:43:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.993038938438112) internal successors, (13759), 4597 states have internal predecessors, (13759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13759 transitions. [2021-06-05 15:43:33,685 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13759 transitions. Word has length 42 [2021-06-05 15:43:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:33,685 INFO L482 AbstractCegarLoop]: Abstraction has 4598 states and 13759 transitions. [2021-06-05 15:43:33,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13759 transitions. [2021-06-05 15:43:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:33,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:33,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:33,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:33,889 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:33,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1267635083, now seen corresponding path program 77 times [2021-06-05 15:43:33,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:33,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680675720] [2021-06-05 15:43:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:34,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:34,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680675720] [2021-06-05 15:43:34,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680675720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:34,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749815936] [2021-06-05 15:43:34,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:34,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:43:34,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:34,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:34,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:34,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:34,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:34,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:34,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:34,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:34,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:34,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:34,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 15:43:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:34,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749815936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:34,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:34,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077661087] [2021-06-05 15:43:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:34,368 INFO L87 Difference]: Start difference. First operand 4598 states and 13759 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:35,255 INFO L93 Difference]: Finished difference Result 5831 states and 17005 transitions. [2021-06-05 15:43:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:43:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:35,262 INFO L225 Difference]: With dead ends: 5831 [2021-06-05 15:43:35,262 INFO L226 Difference]: Without dead ends: 5580 [2021-06-05 15:43:35,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:43:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-06-05 15:43:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 4646. [2021-06-05 15:43:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 2.9909580193756726) internal successors, (13893), 4645 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 13893 transitions. [2021-06-05 15:43:35,313 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 13893 transitions. Word has length 42 [2021-06-05 15:43:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:35,313 INFO L482 AbstractCegarLoop]: Abstraction has 4646 states and 13893 transitions. [2021-06-05 15:43:35,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 13893 transitions. [2021-06-05 15:43:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:35,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:35,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:35,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:35,518 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:35,518 INFO L82 PathProgramCache]: Analyzing trace with hash 545547783, now seen corresponding path program 78 times [2021-06-05 15:43:35,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117188659] [2021-06-05 15:43:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:35,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:35,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117188659] [2021-06-05 15:43:35,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117188659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:35,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624547143] [2021-06-05 15:43:35,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:35,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:43:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:35,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:35,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:35,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:35,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:35,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:35,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:35,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:35,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:35,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:35,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:35,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:35,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624547143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:35,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:35,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:35,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563143419] [2021-06-05 15:43:35,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:35,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:35,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:35,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:35,999 INFO L87 Difference]: Start difference. First operand 4646 states and 13893 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:36,841 INFO L93 Difference]: Finished difference Result 6026 states and 17387 transitions. [2021-06-05 15:43:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:43:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:36,848 INFO L225 Difference]: With dead ends: 6026 [2021-06-05 15:43:36,848 INFO L226 Difference]: Without dead ends: 5805 [2021-06-05 15:43:36,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:43:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2021-06-05 15:43:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 4649. [2021-06-05 15:43:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.991394148020654) internal successors, (13904), 4648 states have internal predecessors, (13904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13904 transitions. [2021-06-05 15:43:36,901 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13904 transitions. Word has length 42 [2021-06-05 15:43:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:36,901 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13904 transitions. [2021-06-05 15:43:36,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13904 transitions. [2021-06-05 15:43:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:36,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:36,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:37,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:37,106 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1614898333, now seen corresponding path program 79 times [2021-06-05 15:43:37,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:37,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485235219] [2021-06-05 15:43:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:37,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:37,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485235219] [2021-06-05 15:43:37,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485235219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:37,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627793694] [2021-06-05 15:43:37,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:37,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:37,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:37,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:37,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:37,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:37,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:37,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:37,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:37,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:37,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627793694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:37,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:37,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:37,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145693835] [2021-06-05 15:43:37,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:37,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:37,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:37,615 INFO L87 Difference]: Start difference. First operand 4649 states and 13904 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:38,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:38,841 INFO L93 Difference]: Finished difference Result 6308 states and 18158 transitions. [2021-06-05 15:43:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:43:38,842 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:38,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:38,848 INFO L225 Difference]: With dead ends: 6308 [2021-06-05 15:43:38,848 INFO L226 Difference]: Without dead ends: 6087 [2021-06-05 15:43:38,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 818.4ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:43:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6087 states. [2021-06-05 15:43:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6087 to 4661. [2021-06-05 15:43:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.9933476394849787) internal successors, (13949), 4660 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13949 transitions. [2021-06-05 15:43:38,898 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13949 transitions. Word has length 42 [2021-06-05 15:43:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:38,898 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 13949 transitions. [2021-06-05 15:43:38,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13949 transitions. [2021-06-05 15:43:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:38,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:38,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:39,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:39,103 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1190152999, now seen corresponding path program 80 times [2021-06-05 15:43:39,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:39,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53581382] [2021-06-05 15:43:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:39,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53581382] [2021-06-05 15:43:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53581382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404978130] [2021-06-05 15:43:39,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:39,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:39,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:39,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:39,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:39,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:39,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:39,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:39,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:39,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:39,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404978130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:39,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:39,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:39,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293391199] [2021-06-05 15:43:39,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:39,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:39,583 INFO L87 Difference]: Start difference. First operand 4661 states and 13949 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:40,758 INFO L93 Difference]: Finished difference Result 6584 states and 19051 transitions. [2021-06-05 15:43:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:43:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:40,765 INFO L225 Difference]: With dead ends: 6584 [2021-06-05 15:43:40,765 INFO L226 Difference]: Without dead ends: 6363 [2021-06-05 15:43:40,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 831.5ms TimeCoverageRelationStatistics Valid=229, Invalid=2123, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:43:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2021-06-05 15:43:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 4665. [2021-06-05 15:43:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.993138936535163) internal successors, (13960), 4664 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13960 transitions. [2021-06-05 15:43:40,820 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13960 transitions. Word has length 42 [2021-06-05 15:43:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:40,820 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 13960 transitions. [2021-06-05 15:43:40,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13960 transitions. [2021-06-05 15:43:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:40,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:40,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:41,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:43:41,025 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash 403947197, now seen corresponding path program 81 times [2021-06-05 15:43:41,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:41,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781160756] [2021-06-05 15:43:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:41,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:41,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781160756] [2021-06-05 15:43:41,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781160756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:41,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56702229] [2021-06-05 15:43:41,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:41,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:43:41,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:41,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:43:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:41,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:41,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:41,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:43:41,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:41,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:41,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:41,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56702229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:41,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:41,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:41,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837661036] [2021-06-05 15:43:41,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:41,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:41,506 INFO L87 Difference]: Start difference. First operand 4665 states and 13960 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:42,956 INFO L93 Difference]: Finished difference Result 7279 states and 21049 transitions. [2021-06-05 15:43:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:43:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:42,963 INFO L225 Difference]: With dead ends: 7279 [2021-06-05 15:43:42,964 INFO L226 Difference]: Without dead ends: 7093 [2021-06-05 15:43:42,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 898.7ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:43:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7093 states. [2021-06-05 15:43:43,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7093 to 4634. [2021-06-05 15:43:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 4633 states have (on average 2.989207856680337) internal successors, (13849), 4633 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 13849 transitions. [2021-06-05 15:43:43,019 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 13849 transitions. Word has length 42 [2021-06-05 15:43:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:43,019 INFO L482 AbstractCegarLoop]: Abstraction has 4634 states and 13849 transitions. [2021-06-05 15:43:43,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 13849 transitions. [2021-06-05 15:43:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:43,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:43,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:43,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:43,224 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:43,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1937609939, now seen corresponding path program 82 times [2021-06-05 15:43:43,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:43,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090987312] [2021-06-05 15:43:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:43,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:43,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090987312] [2021-06-05 15:43:43,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090987312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:43,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630082883] [2021-06-05 15:43:43,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:43,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:43,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:43,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:43,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:43,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:43,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:43,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:43,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:43,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:43,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:43,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:43,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630082883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:43,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:43,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:43,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324097229] [2021-06-05 15:43:43,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:43,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:43,716 INFO L87 Difference]: Start difference. First operand 4634 states and 13849 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:44,513 INFO L93 Difference]: Finished difference Result 5183 states and 15217 transitions. [2021-06-05 15:43:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:43:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:44,519 INFO L225 Difference]: With dead ends: 5183 [2021-06-05 15:43:44,519 INFO L226 Difference]: Without dead ends: 4962 [2021-06-05 15:43:44,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:43:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-05 15:43:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 4640. [2021-06-05 15:43:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4639 states have (on average 2.989437378745419) internal successors, (13868), 4639 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 13868 transitions. [2021-06-05 15:43:44,567 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 13868 transitions. Word has length 42 [2021-06-05 15:43:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:44,567 INFO L482 AbstractCegarLoop]: Abstraction has 4640 states and 13868 transitions. [2021-06-05 15:43:44,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 13868 transitions. [2021-06-05 15:43:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:44,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:44,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:44,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:43:44,772 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1288006807, now seen corresponding path program 83 times [2021-06-05 15:43:44,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:44,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771370284] [2021-06-05 15:43:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:44,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:44,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771370284] [2021-06-05 15:43:44,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771370284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:44,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584837583] [2021-06-05 15:43:44,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:44,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:43:44,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:45,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:45,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:45,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:45,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:45,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:45,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:45,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:45,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:45,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584837583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:45,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:45,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026153884] [2021-06-05 15:43:45,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:45,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:45,283 INFO L87 Difference]: Start difference. First operand 4640 states and 13868 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:46,261 INFO L93 Difference]: Finished difference Result 5547 states and 16127 transitions. [2021-06-05 15:43:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:43:46,261 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:46,267 INFO L225 Difference]: With dead ends: 5547 [2021-06-05 15:43:46,267 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 15:43:46,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 15:43:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4652. [2021-06-05 15:43:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9913996989894645) internal successors, (13913), 4651 states have internal predecessors, (13913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13913 transitions. [2021-06-05 15:43:46,315 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13913 transitions. Word has length 42 [2021-06-05 15:43:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:46,316 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 13913 transitions. [2021-06-05 15:43:46,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13913 transitions. [2021-06-05 15:43:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:46,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:46,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:46,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:46,520 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash 201909157, now seen corresponding path program 84 times [2021-06-05 15:43:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:46,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344454709] [2021-06-05 15:43:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:46,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344454709] [2021-06-05 15:43:46,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344454709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007803908] [2021-06-05 15:43:46,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:46,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:43:46,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:46,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:46,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:46,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:46,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:46,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:46,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:46,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:46,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:46,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:46,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:47,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007803908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:47,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:47,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:47,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692556602] [2021-06-05 15:43:47,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:47,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:47,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:47,016 INFO L87 Difference]: Start difference. First operand 4652 states and 13913 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:48,091 INFO L93 Difference]: Finished difference Result 5718 states and 16727 transitions. [2021-06-05 15:43:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:43:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:48,097 INFO L225 Difference]: With dead ends: 5718 [2021-06-05 15:43:48,097 INFO L226 Difference]: Without dead ends: 5497 [2021-06-05 15:43:48,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 810.5ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5497 states. [2021-06-05 15:43:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5497 to 4656. [2021-06-05 15:43:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 2.9911922663802364) internal successors, (13924), 4655 states have internal predecessors, (13924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 13924 transitions. [2021-06-05 15:43:48,148 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 13924 transitions. Word has length 42 [2021-06-05 15:43:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:48,148 INFO L482 AbstractCegarLoop]: Abstraction has 4656 states and 13924 transitions. [2021-06-05 15:43:48,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 13924 transitions. [2021-06-05 15:43:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:48,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:48,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:48,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:48,353 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1796009353, now seen corresponding path program 85 times [2021-06-05 15:43:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:48,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832890244] [2021-06-05 15:43:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:48,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832890244] [2021-06-05 15:43:48,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832890244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:48,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516500440] [2021-06-05 15:43:48,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:48,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:48,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:48,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:48,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:48,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:48,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:48,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:48,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:48,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:48,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:48,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516500440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:48,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:48,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:48,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121030547] [2021-06-05 15:43:48,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:48,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:48,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:48,844 INFO L87 Difference]: Start difference. First operand 4656 states and 13924 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:49,997 INFO L93 Difference]: Finished difference Result 6156 states and 18018 transitions. [2021-06-05 15:43:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:43:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:50,004 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 15:43:50,004 INFO L226 Difference]: Without dead ends: 5970 [2021-06-05 15:43:50,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:43:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5970 states. [2021-06-05 15:43:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5970 to 4637. [2021-06-05 15:43:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.98899913718723) internal successors, (13857), 4636 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13857 transitions. [2021-06-05 15:43:50,054 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13857 transitions. Word has length 42 [2021-06-05 15:43:50,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:50,054 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13857 transitions. [2021-06-05 15:43:50,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13857 transitions. [2021-06-05 15:43:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:50,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:50,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:50,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:50,259 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash 135050515, now seen corresponding path program 86 times [2021-06-05 15:43:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:50,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741466720] [2021-06-05 15:43:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:50,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741466720] [2021-06-05 15:43:50,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741466720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528960681] [2021-06-05 15:43:50,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:50,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:43:50,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:50,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:50,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:50,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:50,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:50,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:50,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:50,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:50,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:50,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:50,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:50,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528960681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:50,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:50,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:50,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583181002] [2021-06-05 15:43:50,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:50,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:50,768 INFO L87 Difference]: Start difference. First operand 4637 states and 13857 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:51,557 INFO L93 Difference]: Finished difference Result 5275 states and 15621 transitions. [2021-06-05 15:43:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:43:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:51,563 INFO L225 Difference]: With dead ends: 5275 [2021-06-05 15:43:51,563 INFO L226 Difference]: Without dead ends: 5054 [2021-06-05 15:43:51,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 745.6ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:43:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-06-05 15:43:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 4657. [2021-06-05 15:43:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.9879725085910653) internal successors, (13912), 4656 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 13912 transitions. [2021-06-05 15:43:51,609 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 13912 transitions. Word has length 42 [2021-06-05 15:43:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:51,609 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 13912 transitions. [2021-06-05 15:43:51,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 13912 transitions. [2021-06-05 15:43:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:51,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:51,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:51,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:51,813 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:51,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1729150711, now seen corresponding path program 87 times [2021-06-05 15:43:51,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:51,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179940630] [2021-06-05 15:43:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:51,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:51,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179940630] [2021-06-05 15:43:51,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179940630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:51,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100449481] [2021-06-05 15:43:51,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:52,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:43:52,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:52,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:43:52,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:52,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:52,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:52,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:52,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:52,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:52,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:52,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:52,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:52,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:52,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:52,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100449481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:52,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:52,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:52,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24123026] [2021-06-05 15:43:52,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:52,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:52,293 INFO L87 Difference]: Start difference. First operand 4657 states and 13912 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:53,113 INFO L93 Difference]: Finished difference Result 5641 states and 16727 transitions. [2021-06-05 15:43:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:43:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:53,120 INFO L225 Difference]: With dead ends: 5641 [2021-06-05 15:43:53,120 INFO L226 Difference]: Without dead ends: 5455 [2021-06-05 15:43:53,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 735.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:43:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2021-06-05 15:43:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 4653. [2021-06-05 15:43:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.988177128116939) internal successors, (13901), 4652 states have internal predecessors, (13901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13901 transitions. [2021-06-05 15:43:53,171 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13901 transitions. Word has length 42 [2021-06-05 15:43:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:53,171 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 13901 transitions. [2021-06-05 15:43:53,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13901 transitions. [2021-06-05 15:43:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:53,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:53,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:53,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 15:43:53,376 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:53,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1085659403, now seen corresponding path program 88 times [2021-06-05 15:43:53,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:53,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333852606] [2021-06-05 15:43:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:53,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333852606] [2021-06-05 15:43:53,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333852606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582205493] [2021-06-05 15:43:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:53,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:53,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:53,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:53,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:53,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:53,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:53,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:53,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:53,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:53,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:53,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:53,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:43:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:53,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582205493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:53,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:53,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:53,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497011383] [2021-06-05 15:43:53,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:53,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:53,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:53,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:53,863 INFO L87 Difference]: Start difference. First operand 4653 states and 13901 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:54,625 INFO L93 Difference]: Finished difference Result 5532 states and 16417 transitions. [2021-06-05 15:43:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:43:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:54,631 INFO L225 Difference]: With dead ends: 5532 [2021-06-05 15:43:54,631 INFO L226 Difference]: Without dead ends: 5346 [2021-06-05 15:43:54,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:43:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-06-05 15:43:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4649. [2021-06-05 15:43:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.988382099827883) internal successors, (13890), 4648 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13890 transitions. [2021-06-05 15:43:54,679 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13890 transitions. Word has length 42 [2021-06-05 15:43:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:54,679 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13890 transitions. [2021-06-05 15:43:54,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13890 transitions. [2021-06-05 15:43:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:54,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:54,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:54,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:54,884 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1866090585, now seen corresponding path program 89 times [2021-06-05 15:43:54,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:54,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676488618] [2021-06-05 15:43:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:55,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676488618] [2021-06-05 15:43:55,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676488618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707423255] [2021-06-05 15:43:55,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:55,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:43:55,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:55,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:55,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:55,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:43:55,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:55,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:55,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:55,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:43:55,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:55,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:55,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:55,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:55,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:55,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707423255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:55,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:55,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:55,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846422831] [2021-06-05 15:43:55,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:55,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:55,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:55,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:55,407 INFO L87 Difference]: Start difference. First operand 4649 states and 13890 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:56,306 INFO L93 Difference]: Finished difference Result 5231 states and 15368 transitions. [2021-06-05 15:43:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:43:56,307 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:56,312 INFO L225 Difference]: With dead ends: 5231 [2021-06-05 15:43:56,312 INFO L226 Difference]: Without dead ends: 5010 [2021-06-05 15:43:56,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 819.9ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2021-06-05 15:43:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 4661. [2021-06-05 15:43:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.990343347639485) internal successors, (13935), 4660 states have internal predecessors, (13935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13935 transitions. [2021-06-05 15:43:56,358 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13935 transitions. Word has length 42 [2021-06-05 15:43:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:56,358 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 13935 transitions. [2021-06-05 15:43:56,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13935 transitions. [2021-06-05 15:43:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:56,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:56,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:56,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 15:43:56,563 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:56,563 INFO L82 PathProgramCache]: Analyzing trace with hash -938960747, now seen corresponding path program 90 times [2021-06-05 15:43:56,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:56,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844585883] [2021-06-05 15:43:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:56,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844585883] [2021-06-05 15:43:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844585883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243309137] [2021-06-05 15:43:56,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:56,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:43:56,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:43:56,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:56,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:56,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:56,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:56,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:56,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:56,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:56,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:56,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:56,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:57,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243309137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:57,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:57,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:57,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232068941] [2021-06-05 15:43:57,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:57,047 INFO L87 Difference]: Start difference. First operand 4661 states and 13935 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:58,144 INFO L93 Difference]: Finished difference Result 5693 states and 16664 transitions. [2021-06-05 15:43:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:43:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:58,150 INFO L225 Difference]: With dead ends: 5693 [2021-06-05 15:43:58,150 INFO L226 Difference]: Without dead ends: 5472 [2021-06-05 15:43:58,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 810.3ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:43:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-05 15:43:58,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 4665. [2021-06-05 15:43:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.990137221269297) internal successors, (13946), 4664 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13946 transitions. [2021-06-05 15:43:58,213 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13946 transitions. Word has length 42 [2021-06-05 15:43:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:58,213 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 13946 transitions. [2021-06-05 15:43:58,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13946 transitions. [2021-06-05 15:43:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:43:58,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:58,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:43:58,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:58,418 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:58,418 INFO L82 PathProgramCache]: Analyzing trace with hash 655139449, now seen corresponding path program 91 times [2021-06-05 15:43:58,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:58,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028760186] [2021-06-05 15:43:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:43:58,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028760186] [2021-06-05 15:43:58,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028760186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891023063] [2021-06-05 15:43:58,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:43:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:58,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:58,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:58,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:58,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:58,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:43:58,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:43:58,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:58,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:58,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:43:58,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:43:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:43:58,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891023063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:58,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:58,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:43:58,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063119391] [2021-06-05 15:43:58,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:43:58,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:43:58,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:43:58,895 INFO L87 Difference]: Start difference. First operand 4665 states and 13946 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:59,999 INFO L93 Difference]: Finished difference Result 6087 states and 17826 transitions. [2021-06-05 15:43:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:43:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:43:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:00,005 INFO L225 Difference]: With dead ends: 6087 [2021-06-05 15:44:00,006 INFO L226 Difference]: Without dead ends: 5901 [2021-06-05 15:44:00,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:44:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-05 15:44:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4610. [2021-06-05 15:44:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.99153829464092) internal successors, (13788), 4609 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13788 transitions. [2021-06-05 15:44:00,054 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13788 transitions. Word has length 42 [2021-06-05 15:44:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:00,054 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 13788 transitions. [2021-06-05 15:44:00,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13788 transitions. [2021-06-05 15:44:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:00,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:00,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:00,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:00,260 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1777111943, now seen corresponding path program 92 times [2021-06-05 15:44:00,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:00,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063142032] [2021-06-05 15:44:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:00,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:00,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063142032] [2021-06-05 15:44:00,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063142032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:00,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025134272] [2021-06-05 15:44:00,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:00,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:00,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:00,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:00,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:00,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:00,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:00,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:00,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:44:00,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:00,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:00,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:00,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:00,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:00,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025134272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:00,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:00,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:00,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228182369] [2021-06-05 15:44:00,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:00,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:00,785 INFO L87 Difference]: Start difference. First operand 4610 states and 13788 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:01,644 INFO L93 Difference]: Finished difference Result 5783 states and 16868 transitions. [2021-06-05 15:44:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:44:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:01,650 INFO L225 Difference]: With dead ends: 5783 [2021-06-05 15:44:01,650 INFO L226 Difference]: Without dead ends: 5532 [2021-06-05 15:44:01,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 745.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:44:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-06-05 15:44:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4598. [2021-06-05 15:44:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.9923863389166847) internal successors, (13756), 4597 states have internal predecessors, (13756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13756 transitions. [2021-06-05 15:44:01,699 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13756 transitions. Word has length 42 [2021-06-05 15:44:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:01,699 INFO L482 AbstractCegarLoop]: Abstraction has 4598 states and 13756 transitions. [2021-06-05 15:44:01,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13756 transitions. [2021-06-05 15:44:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:01,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:01,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:01,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:44:01,905 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash 36070923, now seen corresponding path program 93 times [2021-06-05 15:44:01,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:01,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646153549] [2021-06-05 15:44:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:02,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:02,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646153549] [2021-06-05 15:44:02,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646153549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:02,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604377693] [2021-06-05 15:44:02,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:02,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:44:02,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:44:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:02,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:02,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:02,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:02,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:02,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:44:02,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:02,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:02,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:02,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:02,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:02,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604377693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:02,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:02,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:02,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346694880] [2021-06-05 15:44:02,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:02,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:02,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:02,416 INFO L87 Difference]: Start difference. First operand 4598 states and 13756 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:03,430 INFO L93 Difference]: Finished difference Result 5975 states and 17242 transitions. [2021-06-05 15:44:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:44:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:03,437 INFO L225 Difference]: With dead ends: 5975 [2021-06-05 15:44:03,437 INFO L226 Difference]: Without dead ends: 5754 [2021-06-05 15:44:03,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 774.1ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:44:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5754 states. [2021-06-05 15:44:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5754 to 4601. [2021-06-05 15:44:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4600 states have (on average 2.9928260869565215) internal successors, (13767), 4600 states have internal predecessors, (13767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 13767 transitions. [2021-06-05 15:44:03,490 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 13767 transitions. Word has length 42 [2021-06-05 15:44:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:03,490 INFO L482 AbstractCegarLoop]: Abstraction has 4601 states and 13767 transitions. [2021-06-05 15:44:03,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 13767 transitions. [2021-06-05 15:44:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:03,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:03,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:03,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 15:44:03,695 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1105421473, now seen corresponding path program 94 times [2021-06-05 15:44:03,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:03,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107173480] [2021-06-05 15:44:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:03,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:03,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107173480] [2021-06-05 15:44:03,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107173480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:03,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456401702] [2021-06-05 15:44:03,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:03,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:03,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:03,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:03,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:03,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:03,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:03,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:03,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:04,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:04,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:04,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:04,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:04,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456401702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:04,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:04,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:04,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2895603] [2021-06-05 15:44:04,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:04,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:04,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:04,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:04,195 INFO L87 Difference]: Start difference. First operand 4601 states and 13767 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:05,295 INFO L93 Difference]: Finished difference Result 6245 states and 17980 transitions. [2021-06-05 15:44:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:44:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:05,302 INFO L225 Difference]: With dead ends: 6245 [2021-06-05 15:44:05,302 INFO L226 Difference]: Without dead ends: 6024 [2021-06-05 15:44:05,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 844.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:44:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2021-06-05 15:44:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 4613. [2021-06-05 15:44:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.99479618386817) internal successors, (13812), 4612 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13812 transitions. [2021-06-05 15:44:05,352 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13812 transitions. Word has length 42 [2021-06-05 15:44:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:05,352 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 13812 transitions. [2021-06-05 15:44:05,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13812 transitions. [2021-06-05 15:44:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:05,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:05,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:05,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:05,556 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1699629859, now seen corresponding path program 95 times [2021-06-05 15:44:05,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:05,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639372038] [2021-06-05 15:44:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:05,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:05,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639372038] [2021-06-05 15:44:05,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639372038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:05,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561435609] [2021-06-05 15:44:05,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:05,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:44:05,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:05,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:05,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:05,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:05,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:05,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:05,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:05,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:05,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:05,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:05,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:05,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 15:44:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:06,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561435609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:06,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:06,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509028953] [2021-06-05 15:44:06,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:06,082 INFO L87 Difference]: Start difference. First operand 4613 states and 13812 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:07,346 INFO L93 Difference]: Finished difference Result 6513 states and 18851 transitions. [2021-06-05 15:44:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:44:07,347 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:07,354 INFO L225 Difference]: With dead ends: 6513 [2021-06-05 15:44:07,354 INFO L226 Difference]: Without dead ends: 6292 [2021-06-05 15:44:07,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 875.1ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:44:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2021-06-05 15:44:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 4617. [2021-06-05 15:44:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.994584055459272) internal successors, (13823), 4616 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13823 transitions. [2021-06-05 15:44:07,410 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13823 transitions. Word has length 42 [2021-06-05 15:44:07,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:07,412 INFO L482 AbstractCegarLoop]: Abstraction has 4617 states and 13823 transitions. [2021-06-05 15:44:07,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13823 transitions. [2021-06-05 15:44:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:07,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:07,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:07,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 15:44:07,632 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash -105529663, now seen corresponding path program 96 times [2021-06-05 15:44:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:07,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943657167] [2021-06-05 15:44:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:07,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943657167] [2021-06-05 15:44:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943657167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139324909] [2021-06-05 15:44:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:07,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:44:07,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:07,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:07,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:07,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:07,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:44:07,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:07,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:07,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:07,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:07,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:08,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139324909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:08,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:08,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:08,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86273935] [2021-06-05 15:44:08,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:08,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:08,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:08,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:08,135 INFO L87 Difference]: Start difference. First operand 4617 states and 13823 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:09,479 INFO L93 Difference]: Finished difference Result 7204 states and 20838 transitions. [2021-06-05 15:44:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:44:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:09,487 INFO L225 Difference]: With dead ends: 7204 [2021-06-05 15:44:09,487 INFO L226 Difference]: Without dead ends: 7018 [2021-06-05 15:44:09,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 924.0ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:44:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2021-06-05 15:44:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 4586. [2021-06-05 15:44:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.99062159214831) internal successors, (13712), 4585 states have internal predecessors, (13712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13712 transitions. [2021-06-05 15:44:09,540 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13712 transitions. Word has length 42 [2021-06-05 15:44:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:09,540 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13712 transitions. [2021-06-05 15:44:09,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13712 transitions. [2021-06-05 15:44:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:09,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:09,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:09,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 15:44:09,745 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1428133079, now seen corresponding path program 97 times [2021-06-05 15:44:09,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:09,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811143811] [2021-06-05 15:44:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:09,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811143811] [2021-06-05 15:44:09,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811143811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778702444] [2021-06-05 15:44:09,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:10,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:10,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:10,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:10,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:10,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:10,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:10,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:10,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:10,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:10,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778702444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:10,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:10,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489160222] [2021-06-05 15:44:10,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:10,237 INFO L87 Difference]: Start difference. First operand 4586 states and 13712 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:11,134 INFO L93 Difference]: Finished difference Result 5117 states and 15032 transitions. [2021-06-05 15:44:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:44:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:11,140 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 15:44:11,140 INFO L226 Difference]: Without dead ends: 4896 [2021-06-05 15:44:11,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:44:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2021-06-05 15:44:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 4574. [2021-06-05 15:44:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 2.992127706101028) internal successors, (13683), 4573 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 13683 transitions. [2021-06-05 15:44:11,202 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 13683 transitions. Word has length 42 [2021-06-05 15:44:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:11,202 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 13683 transitions. [2021-06-05 15:44:11,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 13683 transitions. [2021-06-05 15:44:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:11,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:11,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:11,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 15:44:11,407 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:11,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1797483667, now seen corresponding path program 98 times [2021-06-05 15:44:11,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:11,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996966685] [2021-06-05 15:44:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:11,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996966685] [2021-06-05 15:44:11,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996966685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:11,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575020691] [2021-06-05 15:44:11,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:11,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:11,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:11,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:11,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:11,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:11,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:11,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:11,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:11,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:11,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:11,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:11,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:11,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575020691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:11,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:11,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:11,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305108624] [2021-06-05 15:44:11,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:11,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:11,905 INFO L87 Difference]: Start difference. First operand 4574 states and 13683 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:13,104 INFO L93 Difference]: Finished difference Result 5469 states and 15909 transitions. [2021-06-05 15:44:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:44:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:13,111 INFO L225 Difference]: With dead ends: 5469 [2021-06-05 15:44:13,111 INFO L226 Difference]: Without dead ends: 5248 [2021-06-05 15:44:13,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 810.2ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:44:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-06-05 15:44:13,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 4586. [2021-06-05 15:44:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994111232279171) internal successors, (13728), 4585 states have internal predecessors, (13728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13728 transitions. [2021-06-05 15:44:13,163 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13728 transitions. Word has length 42 [2021-06-05 15:44:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:13,163 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13728 transitions. [2021-06-05 15:44:13,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13728 transitions. [2021-06-05 15:44:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:13,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:13,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:13,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:13,369 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash -307567703, now seen corresponding path program 99 times [2021-06-05 15:44:13,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:13,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128064170] [2021-06-05 15:44:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:13,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:13,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128064170] [2021-06-05 15:44:13,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128064170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:13,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021780039] [2021-06-05 15:44:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:13,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:44:13,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:13,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:13,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:13,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:44:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:13,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:13,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021780039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:13,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:13,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:13,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923669015] [2021-06-05 15:44:13,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:13,898 INFO L87 Difference]: Start difference. First operand 4586 states and 13728 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:14,902 INFO L93 Difference]: Finished difference Result 5632 states and 16487 transitions. [2021-06-05 15:44:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:44:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:14,908 INFO L225 Difference]: With dead ends: 5632 [2021-06-05 15:44:14,908 INFO L226 Difference]: Without dead ends: 5411 [2021-06-05 15:44:14,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:44:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-06-05 15:44:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 4590. [2021-06-05 15:44:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4589 states have (on average 2.9938984528219654) internal successors, (13739), 4589 states have internal predecessors, (13739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 13739 transitions. [2021-06-05 15:44:14,955 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 13739 transitions. Word has length 42 [2021-06-05 15:44:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:14,955 INFO L482 AbstractCegarLoop]: Abstraction has 4590 states and 13739 transitions. [2021-06-05 15:44:14,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 13739 transitions. [2021-06-05 15:44:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:14,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:14,959 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:15,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:44:15,159 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1286532493, now seen corresponding path program 100 times [2021-06-05 15:44:15,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:15,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908606199] [2021-06-05 15:44:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:15,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:15,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908606199] [2021-06-05 15:44:15,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908606199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:15,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572109598] [2021-06-05 15:44:15,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:15,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:15,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:15,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:15,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:15,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:15,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:15,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:15,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:15,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572109598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:15,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:15,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:15,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540367152] [2021-06-05 15:44:15,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:15,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:15,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:15,649 INFO L87 Difference]: Start difference. First operand 4590 states and 13739 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:16,975 INFO L93 Difference]: Finished difference Result 6066 states and 17767 transitions. [2021-06-05 15:44:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:44:16,975 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:16,981 INFO L225 Difference]: With dead ends: 6066 [2021-06-05 15:44:16,982 INFO L226 Difference]: Without dead ends: 5880 [2021-06-05 15:44:16,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:44:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2021-06-05 15:44:17,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4571. [2021-06-05 15:44:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2021-06-05 15:44:17,029 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2021-06-05 15:44:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:17,030 INFO L482 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2021-06-05 15:44:17,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2021-06-05 15:44:17,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:17,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:17,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:17,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 15:44:17,234 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -374426345, now seen corresponding path program 101 times [2021-06-05 15:44:17,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:17,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281577789] [2021-06-05 15:44:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:17,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:17,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281577789] [2021-06-05 15:44:17,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281577789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:17,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846805561] [2021-06-05 15:44:17,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:17,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:44:17,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:44:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:17,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:17,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:17,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:17,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:17,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:17,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:17,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:17,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:17,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:44:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:17,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846805561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:17,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:17,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:17,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682977365] [2021-06-05 15:44:17,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:17,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:17,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:17,734 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:18,541 INFO L93 Difference]: Finished difference Result 5189 states and 15381 transitions. [2021-06-05 15:44:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:44:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:18,546 INFO L225 Difference]: With dead ends: 5189 [2021-06-05 15:44:18,546 INFO L226 Difference]: Without dead ends: 4968 [2021-06-05 15:44:18,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:44:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2021-06-05 15:44:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 4575. [2021-06-05 15:44:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4574 states have (on average 2.991473546130302) internal successors, (13683), 4574 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 13683 transitions. [2021-06-05 15:44:18,591 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 13683 transitions. Word has length 42 [2021-06-05 15:44:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:18,591 INFO L482 AbstractCegarLoop]: Abstraction has 4575 states and 13683 transitions. [2021-06-05 15:44:18,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 13683 transitions. [2021-06-05 15:44:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:18,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:18,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:18,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 15:44:18,795 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1219673851, now seen corresponding path program 102 times [2021-06-05 15:44:18,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:18,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770011929] [2021-06-05 15:44:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:18,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:18,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770011929] [2021-06-05 15:44:18,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770011929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:18,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875123982] [2021-06-05 15:44:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:18,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:44:18,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:44:18,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:19,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:19,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:19,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:19,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:19,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:19,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:19,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:19,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:19,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:19,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:19,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875123982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:19,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:19,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:19,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755966419] [2021-06-05 15:44:19,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:19,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:19,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:19,312 INFO L87 Difference]: Start difference. First operand 4575 states and 13683 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:20,176 INFO L93 Difference]: Finished difference Result 5551 states and 16476 transitions. [2021-06-05 15:44:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:44:20,177 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:20,182 INFO L225 Difference]: With dead ends: 5551 [2021-06-05 15:44:20,182 INFO L226 Difference]: Without dead ends: 5365 [2021-06-05 15:44:20,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:44:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2021-06-05 15:44:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 4571. [2021-06-05 15:44:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2021-06-05 15:44:20,230 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2021-06-05 15:44:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:20,230 INFO L482 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2021-06-05 15:44:20,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2021-06-05 15:44:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:20,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:20,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:20,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:20,434 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1595136263, now seen corresponding path program 103 times [2021-06-05 15:44:20,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:20,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110767070] [2021-06-05 15:44:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:20,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:20,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110767070] [2021-06-05 15:44:20,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110767070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:20,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072585366] [2021-06-05 15:44:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:20,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:20,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:20,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:20,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:20,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:20,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:20,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:20,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:20,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:20,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:20,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072585366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:20,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:20,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:20,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417035010] [2021-06-05 15:44:20,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:20,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:20,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:20,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:20,922 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:21,798 INFO L93 Difference]: Finished difference Result 5442 states and 16166 transitions. [2021-06-05 15:44:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:44:21,798 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:21,803 INFO L225 Difference]: With dead ends: 5442 [2021-06-05 15:44:21,803 INFO L226 Difference]: Without dead ends: 5256 [2021-06-05 15:44:21,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:44:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-06-05 15:44:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 4559. [2021-06-05 15:44:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 2.9923211935059237) internal successors, (13639), 4558 states have internal predecessors, (13639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 13639 transitions. [2021-06-05 15:44:21,847 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 13639 transitions. Word has length 42 [2021-06-05 15:44:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:21,847 INFO L482 AbstractCegarLoop]: Abstraction has 4559 states and 13639 transitions. [2021-06-05 15:44:21,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 13639 transitions. [2021-06-05 15:44:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:21,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:21,851 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:22,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:22,051 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:22,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1356613725, now seen corresponding path program 104 times [2021-06-05 15:44:22,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:22,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591513086] [2021-06-05 15:44:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:22,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:22,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591513086] [2021-06-05 15:44:22,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591513086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:22,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485813072] [2021-06-05 15:44:22,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:22,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:22,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:22,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:22,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:22,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:22,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:22,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:22,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485813072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:22,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:22,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:22,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306078301] [2021-06-05 15:44:22,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:22,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:22,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:22,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:22,545 INFO L87 Difference]: Start difference. First operand 4559 states and 13639 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:23,548 INFO L93 Difference]: Finished difference Result 5072 states and 14919 transitions. [2021-06-05 15:44:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:44:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:23,553 INFO L225 Difference]: With dead ends: 5072 [2021-06-05 15:44:23,553 INFO L226 Difference]: Without dead ends: 4851 [2021-06-05 15:44:23,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 819.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:44:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-06-05 15:44:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 4502. [2021-06-05 15:44:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 2.9962230615418797) internal successors, (13486), 4501 states have internal predecessors, (13486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 13486 transitions. [2021-06-05 15:44:23,596 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 13486 transitions. Word has length 42 [2021-06-05 15:44:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:23,596 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 13486 transitions. [2021-06-05 15:44:23,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 13486 transitions. [2021-06-05 15:44:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:23,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:23,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:23,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:23,800 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:23,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1448437607, now seen corresponding path program 105 times [2021-06-05 15:44:23,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:23,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524631172] [2021-06-05 15:44:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:23,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:23,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524631172] [2021-06-05 15:44:23,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524631172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:23,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767483979] [2021-06-05 15:44:23,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:23,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:44:23,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:23,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:23,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:24,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:24,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:24,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:24,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:24,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 15:44:24,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:24,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:24,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:24,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:24,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:24,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767483979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:24,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:24,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:24,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335021905] [2021-06-05 15:44:24,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:24,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:24,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:24,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:24,286 INFO L87 Difference]: Start difference. First operand 4502 states and 13486 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:25,360 INFO L93 Difference]: Finished difference Result 5470 states and 16035 transitions. [2021-06-05 15:44:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:44:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:25,366 INFO L225 Difference]: With dead ends: 5470 [2021-06-05 15:44:25,366 INFO L226 Difference]: Without dead ends: 5249 [2021-06-05 15:44:25,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 831.6ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:44:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-06-05 15:44:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 4474. [2021-06-05 15:44:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 2.9973172367538563) internal successors, (13407), 4473 states have internal predecessors, (13407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 13407 transitions. [2021-06-05 15:44:25,413 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 13407 transitions. Word has length 42 [2021-06-05 15:44:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:25,414 INFO L482 AbstractCegarLoop]: Abstraction has 4474 states and 13407 transitions. [2021-06-05 15:44:25,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 13407 transitions. [2021-06-05 15:44:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:44:25,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:25,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:25,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 15:44:25,618 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash 145662589, now seen corresponding path program 106 times [2021-06-05 15:44:25,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:25,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905958549] [2021-06-05 15:44:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:25,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:25,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905958549] [2021-06-05 15:44:25,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905958549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:25,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099179415] [2021-06-05 15:44:25,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:25,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:25,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:25,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:25,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:25,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:25,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 15:44:25,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:25,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:25,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 15:44:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:26,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099179415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:26,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:26,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 15:44:26,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610038978] [2021-06-05 15:44:26,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:44:26,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:44:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:26,105 INFO L87 Difference]: Start difference. First operand 4474 states and 13407 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:27,240 INFO L93 Difference]: Finished difference Result 5832 states and 17107 transitions. [2021-06-05 15:44:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:44:27,240 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:44:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:27,246 INFO L225 Difference]: With dead ends: 5832 [2021-06-05 15:44:27,246 INFO L226 Difference]: Without dead ends: 5646 [2021-06-05 15:44:27,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 915.7ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:44:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-05 15:44:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 4343. [2021-06-05 15:44:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4342 states have (on average 3.00322432058959) internal successors, (13040), 4342 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 13040 transitions. [2021-06-05 15:44:27,293 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 13040 transitions. Word has length 42 [2021-06-05 15:44:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:27,293 INFO L482 AbstractCegarLoop]: Abstraction has 4343 states and 13040 transitions. [2021-06-05 15:44:27,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 13040 transitions. [2021-06-05 15:44:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:44:27,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:27,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:27,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:27,497 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1672640872, now seen corresponding path program 107 times [2021-06-05 15:44:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:27,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448385950] [2021-06-05 15:44:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:27,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448385950] [2021-06-05 15:44:27,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448385950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255293377] [2021-06-05 15:44:27,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:27,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:44:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 15:44:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:27,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:27,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:27,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:27,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 15:44:27,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:27,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:3 [2021-06-05 15:44:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255293377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:27,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:27,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 15:44:27,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163028472] [2021-06-05 15:44:27,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:44:27,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:27,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:44:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:44:27,722 INFO L87 Difference]: Start difference. First operand 4343 states and 13040 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:28,026 INFO L93 Difference]: Finished difference Result 10234 states and 30534 transitions. [2021-06-05 15:44:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:44:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:44:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:28,037 INFO L225 Difference]: With dead ends: 10234 [2021-06-05 15:44:28,037 INFO L226 Difference]: Without dead ends: 10160 [2021-06-05 15:44:28,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:44:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10160 states. [2021-06-05 15:44:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10160 to 7919. [2021-06-05 15:44:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7919 states, 7918 states have (on average 2.9993685274059105) internal successors, (23749), 7918 states have internal predecessors, (23749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 23749 transitions. [2021-06-05 15:44:28,131 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 23749 transitions. Word has length 45 [2021-06-05 15:44:28,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:28,131 INFO L482 AbstractCegarLoop]: Abstraction has 7919 states and 23749 transitions. [2021-06-05 15:44:28,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 23749 transitions. [2021-06-05 15:44:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 15:44:28,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:28,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:28,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:44:28,340 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:28,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:28,340 INFO L82 PathProgramCache]: Analyzing trace with hash 720881366, now seen corresponding path program 108 times [2021-06-05 15:44:28,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:28,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273744623] [2021-06-05 15:44:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:28,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273744623] [2021-06-05 15:44:28,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273744623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305752617] [2021-06-05 15:44:28,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:28,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:44:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:44:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:28,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305752617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:28,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:28,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:44:28,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644303382] [2021-06-05 15:44:28,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:44:28,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:28,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:44:28,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:28,445 INFO L87 Difference]: Start difference. First operand 7919 states and 23749 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:28,484 INFO L93 Difference]: Finished difference Result 14786 states and 44002 transitions. [2021-06-05 15:44:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:44:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 15:44:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:28,501 INFO L225 Difference]: With dead ends: 14786 [2021-06-05 15:44:28,501 INFO L226 Difference]: Without dead ends: 14467 [2021-06-05 15:44:28,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14467 states. [2021-06-05 15:44:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14467 to 10469. [2021-06-05 15:44:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 10468 states have (on average 3.0246465418418036) internal successors, (31662), 10468 states have internal predecessors, (31662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 31662 transitions. [2021-06-05 15:44:28,641 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 31662 transitions. Word has length 46 [2021-06-05 15:44:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:28,641 INFO L482 AbstractCegarLoop]: Abstraction has 10469 states and 31662 transitions. [2021-06-05 15:44:28,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 31662 transitions. [2021-06-05 15:44:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:44:28,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:28,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:28,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:28,853 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1385132176, now seen corresponding path program 109 times [2021-06-05 15:44:28,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:28,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989988185] [2021-06-05 15:44:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:44:28,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:28,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989988185] [2021-06-05 15:44:28,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989988185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:28,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967370385] [2021-06-05 15:44:28,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:28,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:44:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:29,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:29,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 15:44:29,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:29,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:29,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967370385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:29,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:29,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 15:44:29,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035624060] [2021-06-05 15:44:29,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:29,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:29,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:29,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:29,077 INFO L87 Difference]: Start difference. First operand 10469 states and 31662 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:30,109 INFO L93 Difference]: Finished difference Result 23559 states and 70272 transitions. [2021-06-05 15:44:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:44:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 15:44:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:30,138 INFO L225 Difference]: With dead ends: 23559 [2021-06-05 15:44:30,138 INFO L226 Difference]: Without dead ends: 23343 [2021-06-05 15:44:30,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=524, Invalid=4306, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:44:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-06-05 15:44:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 15335. [2021-06-05 15:44:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15335 states, 15334 states have (on average 3.039259162645102) internal successors, (46604), 15334 states have internal predecessors, (46604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15335 states to 15335 states and 46604 transitions. [2021-06-05 15:44:30,370 INFO L78 Accepts]: Start accepts. Automaton has 15335 states and 46604 transitions. Word has length 50 [2021-06-05 15:44:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:30,370 INFO L482 AbstractCegarLoop]: Abstraction has 15335 states and 46604 transitions. [2021-06-05 15:44:30,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 15335 states and 46604 transitions. [2021-06-05 15:44:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:44:30,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:30,385 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:30,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:30,586 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1131355344, now seen corresponding path program 110 times [2021-06-05 15:44:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:30,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824609837] [2021-06-05 15:44:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:30,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:30,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824609837] [2021-06-05 15:44:30,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824609837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358228910] [2021-06-05 15:44:30,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:30,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:30,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:44:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:30,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:30,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:30,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:30,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:30,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:9 [2021-06-05 15:44:30,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:30,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:30,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:30,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:30,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:30,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358228910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:30,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:30,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 15:44:30,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986117175] [2021-06-05 15:44:30,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:44:30,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:44:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:44:30,880 INFO L87 Difference]: Start difference. First operand 15335 states and 46604 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:31,641 INFO L93 Difference]: Finished difference Result 32072 states and 96588 transitions. [2021-06-05 15:44:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:44:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 15:44:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:31,687 INFO L225 Difference]: With dead ends: 32072 [2021-06-05 15:44:31,687 INFO L226 Difference]: Without dead ends: 32072 [2021-06-05 15:44:31,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32072 states. [2021-06-05 15:44:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32072 to 18125. [2021-06-05 15:44:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18125 states, 18124 states have (on average 3.0475612447583313) internal successors, (55234), 18124 states have internal predecessors, (55234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18125 states to 18125 states and 55234 transitions. [2021-06-05 15:44:31,967 INFO L78 Accepts]: Start accepts. Automaton has 18125 states and 55234 transitions. Word has length 50 [2021-06-05 15:44:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:31,967 INFO L482 AbstractCegarLoop]: Abstraction has 18125 states and 55234 transitions. [2021-06-05 15:44:31,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 18125 states and 55234 transitions. [2021-06-05 15:44:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:44:31,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:31,987 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:32,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:32,188 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2029396504, now seen corresponding path program 111 times [2021-06-05 15:44:32,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:32,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674117783] [2021-06-05 15:44:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:44:32,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674117783] [2021-06-05 15:44:32,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674117783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117208620] [2021-06-05 15:44:32,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:32,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:44:32,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:44:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:32,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 15:44:32,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:3 [2021-06-05 15:44:32,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:32,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:32,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117208620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:32,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:32,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 15:44:32,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134134771] [2021-06-05 15:44:32,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:44:32,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:44:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:44:32,366 INFO L87 Difference]: Start difference. First operand 18125 states and 55234 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:33,252 INFO L93 Difference]: Finished difference Result 46630 states and 139823 transitions. [2021-06-05 15:44:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:44:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 15:44:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:33,313 INFO L225 Difference]: With dead ends: 46630 [2021-06-05 15:44:33,313 INFO L226 Difference]: Without dead ends: 46558 [2021-06-05 15:44:33,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=428, Invalid=1734, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:44:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46558 states. [2021-06-05 15:44:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46558 to 18168. [2021-06-05 15:44:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18168 states, 18167 states have (on average 3.048329388451588) internal successors, (55379), 18167 states have internal predecessors, (55379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18168 states to 18168 states and 55379 transitions. [2021-06-05 15:44:33,675 INFO L78 Accepts]: Start accepts. Automaton has 18168 states and 55379 transitions. Word has length 50 [2021-06-05 15:44:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:33,675 INFO L482 AbstractCegarLoop]: Abstraction has 18168 states and 55379 transitions. [2021-06-05 15:44:33,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 18168 states and 55379 transitions. [2021-06-05 15:44:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:44:33,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:33,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:33,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 15:44:33,894 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash 557888300, now seen corresponding path program 112 times [2021-06-05 15:44:33,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:33,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652475357] [2021-06-05 15:44:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:44:33,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652475357] [2021-06-05 15:44:33,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652475357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331162605] [2021-06-05 15:44:33,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:33,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:33,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:33,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:44:33,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:34,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:34,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:34,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2021-06-05 15:44:34,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:34,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:34,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:34,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331162605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:34,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:34,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 15:44:34,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240780410] [2021-06-05 15:44:34,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:44:34,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:44:34,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:44:34,105 INFO L87 Difference]: Start difference. First operand 18168 states and 55379 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:35,288 INFO L93 Difference]: Finished difference Result 42820 states and 128095 transitions. [2021-06-05 15:44:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:44:35,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 15:44:35,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:35,344 INFO L225 Difference]: With dead ends: 42820 [2021-06-05 15:44:35,344 INFO L226 Difference]: Without dead ends: 42820 [2021-06-05 15:44:35,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=680, Invalid=4012, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:44:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42820 states. [2021-06-05 15:44:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42820 to 18704. [2021-06-05 15:44:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18703 states have (on average 3.0469978078383146) internal successors, (56988), 18703 states have internal predecessors, (56988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 56988 transitions. [2021-06-05 15:44:35,704 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 56988 transitions. Word has length 50 [2021-06-05 15:44:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:35,704 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 56988 transitions. [2021-06-05 15:44:35,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 56988 transitions. [2021-06-05 15:44:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:44:35,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:35,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:35,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 15:44:35,924 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 298217094, now seen corresponding path program 113 times [2021-06-05 15:44:35,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:35,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438325685] [2021-06-05 15:44:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:35,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:35,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438325685] [2021-06-05 15:44:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438325685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:35,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95454190] [2021-06-05 15:44:35,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:36,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:44:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:44:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:36,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 15:44:36,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:36,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:11 [2021-06-05 15:44:36,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:36,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:36,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:36,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:36,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95454190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:36,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:36,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 15:44:36,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206155885] [2021-06-05 15:44:36,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:44:36,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:36,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:44:36,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:44:36,101 INFO L87 Difference]: Start difference. First operand 18704 states and 56988 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:36,787 INFO L93 Difference]: Finished difference Result 36696 states and 110045 transitions. [2021-06-05 15:44:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:44:36,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 50 [2021-06-05 15:44:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:36,835 INFO L225 Difference]: With dead ends: 36696 [2021-06-05 15:44:36,836 INFO L226 Difference]: Without dead ends: 36480 [2021-06-05 15:44:36,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:44:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36480 states. [2021-06-05 15:44:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36480 to 20510. [2021-06-05 15:44:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20510 states, 20509 states have (on average 3.056024184504364) internal successors, (62676), 20509 states have internal predecessors, (62676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20510 states to 20510 states and 62676 transitions. [2021-06-05 15:44:37,177 INFO L78 Accepts]: Start accepts. Automaton has 20510 states and 62676 transitions. Word has length 50 [2021-06-05 15:44:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:37,177 INFO L482 AbstractCegarLoop]: Abstraction has 20510 states and 62676 transitions. [2021-06-05 15:44:37,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20510 states and 62676 transitions. [2021-06-05 15:44:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:44:37,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:37,197 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:37,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 15:44:37,401 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash -603741626, now seen corresponding path program 114 times [2021-06-05 15:44:37,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:37,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527497923] [2021-06-05 15:44:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:37,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:37,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527497923] [2021-06-05 15:44:37,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527497923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:37,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380564227] [2021-06-05 15:44:37,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:37,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:44:37,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:37,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:44:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:37,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:37,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:37,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380564227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:37,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:37,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 15:44:37,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319713933] [2021-06-05 15:44:37,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:44:37,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:44:37,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:44:37,589 INFO L87 Difference]: Start difference. First operand 20510 states and 62676 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:38,932 INFO L93 Difference]: Finished difference Result 56439 states and 168853 transitions. [2021-06-05 15:44:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:44:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 15:44:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:39,021 INFO L225 Difference]: With dead ends: 56439 [2021-06-05 15:44:39,021 INFO L226 Difference]: Without dead ends: 56367 [2021-06-05 15:44:39,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=603, Invalid=3819, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:44:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56367 states. [2021-06-05 15:44:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56367 to 20553. [2021-06-05 15:44:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20553 states, 20552 states have (on average 3.0566854807318022) internal successors, (62821), 20552 states have internal predecessors, (62821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20553 states to 20553 states and 62821 transitions. [2021-06-05 15:44:39,502 INFO L78 Accepts]: Start accepts. Automaton has 20553 states and 62821 transitions. Word has length 50 [2021-06-05 15:44:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:39,502 INFO L482 AbstractCegarLoop]: Abstraction has 20553 states and 62821 transitions. [2021-06-05 15:44:39,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 20553 states and 62821 transitions. [2021-06-05 15:44:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:44:39,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:39,523 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:39,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:44:39,729 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1983543178, now seen corresponding path program 115 times [2021-06-05 15:44:39,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:39,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949103571] [2021-06-05 15:44:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:39,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949103571] [2021-06-05 15:44:39,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949103571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486535509] [2021-06-05 15:44:39,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:44:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:44:39,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:39,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:39,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:39,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:9 [2021-06-05 15:44:39,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:44:39,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:39,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:39,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:39,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:44:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:39,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486535509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:39,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:39,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 15:44:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455748702] [2021-06-05 15:44:39,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:39,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:39,954 INFO L87 Difference]: Start difference. First operand 20553 states and 62821 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:40,989 INFO L93 Difference]: Finished difference Result 37544 states and 112111 transitions. [2021-06-05 15:44:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:44:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 15:44:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:41,045 INFO L225 Difference]: With dead ends: 37544 [2021-06-05 15:44:41,045 INFO L226 Difference]: Without dead ends: 37544 [2021-06-05 15:44:41,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:44:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37544 states. [2021-06-05 15:44:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37544 to 19929. [2021-06-05 15:44:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19929 states, 19928 states have (on average 3.0583099156965075) internal successors, (60946), 19928 states have internal predecessors, (60946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19929 states to 19929 states and 60946 transitions. [2021-06-05 15:44:41,383 INFO L78 Accepts]: Start accepts. Automaton has 19929 states and 60946 transitions. Word has length 50 [2021-06-05 15:44:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:41,383 INFO L482 AbstractCegarLoop]: Abstraction has 19929 states and 60946 transitions. [2021-06-05 15:44:41,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 19929 states and 60946 transitions. [2021-06-05 15:44:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:44:41,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:41,401 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-06-05 15:44:41,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:41,601 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash -522037444, now seen corresponding path program 116 times [2021-06-05 15:44:41,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:41,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761719913] [2021-06-05 15:44:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:41,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761719913] [2021-06-05 15:44:41,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761719913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308771221] [2021-06-05 15:44:41,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:41,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:41,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:44:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:41,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308771221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:41,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:41,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:44:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166957638] [2021-06-05 15:44:41,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:44:41,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:44:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:41,720 INFO L87 Difference]: Start difference. First operand 19929 states and 60946 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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) [2021-06-05 15:44:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:41,783 INFO L93 Difference]: Finished difference Result 24230 states and 72312 transitions. [2021-06-05 15:44:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:44:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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 51 [2021-06-05 15:44:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:41,815 INFO L225 Difference]: With dead ends: 24230 [2021-06-05 15:44:41,815 INFO L226 Difference]: Without dead ends: 23607 [2021-06-05 15:44:41,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23607 states. [2021-06-05 15:44:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23607 to 21236. [2021-06-05 15:44:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21236 states, 21235 states have (on average 3.0346597598304688) internal successors, (64441), 21235 states have internal predecessors, (64441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21236 states to 21236 states and 64441 transitions. [2021-06-05 15:44:42,075 INFO L78 Accepts]: Start accepts. Automaton has 21236 states and 64441 transitions. Word has length 51 [2021-06-05 15:44:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:42,075 INFO L482 AbstractCegarLoop]: Abstraction has 21236 states and 64441 transitions. [2021-06-05 15:44:42,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 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) [2021-06-05 15:44:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 21236 states and 64441 transitions. [2021-06-05 15:44:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:42,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:42,190 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:42,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:42,405 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1746190265, now seen corresponding path program 117 times [2021-06-05 15:44:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188731597] [2021-06-05 15:44:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:42,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:42,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188731597] [2021-06-05 15:44:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188731597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:42,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033490888] [2021-06-05 15:44:42,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:42,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:44:42,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:42,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 15:44:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:43,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:43,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:44:43,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:43,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:44:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:43,341 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 15:44:43,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 15:44:43,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:43,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:44:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033490888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:43,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:43,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 41 [2021-06-05 15:44:43,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434798618] [2021-06-05 15:44:43,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:44:43,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:44:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:44:43,668 INFO L87 Difference]: Start difference. First operand 21236 states and 64441 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:46,609 INFO L93 Difference]: Finished difference Result 23988 states and 71909 transitions. [2021-06-05 15:44:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:44:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:46,639 INFO L225 Difference]: With dead ends: 23988 [2021-06-05 15:44:46,639 INFO L226 Difference]: Without dead ends: 23753 [2021-06-05 15:44:46,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 2424.2ms TimeCoverageRelationStatistics Valid=418, Invalid=5588, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:44:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23753 states. [2021-06-05 15:44:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23753 to 21710. [2021-06-05 15:44:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21710 states, 21709 states have (on average 3.023538624533604) internal successors, (65638), 21709 states have internal predecessors, (65638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21710 states to 21710 states and 65638 transitions. [2021-06-05 15:44:46,922 INFO L78 Accepts]: Start accepts. Automaton has 21710 states and 65638 transitions. Word has length 54 [2021-06-05 15:44:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:46,923 INFO L482 AbstractCegarLoop]: Abstraction has 21710 states and 65638 transitions. [2021-06-05 15:44:46,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 21710 states and 65638 transitions. [2021-06-05 15:44:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:46,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:46,943 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:47,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:47,143 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash 353158135, now seen corresponding path program 118 times [2021-06-05 15:44:47,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:47,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616003547] [2021-06-05 15:44:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:47,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:47,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616003547] [2021-06-05 15:44:47,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616003547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:47,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697657068] [2021-06-05 15:44:47,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:47,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:47,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:44:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:47,844 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:44:47,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:44:47,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:47,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 15:44:47,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:47,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:44:47,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:47,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:44:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697657068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 15:44:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963108980] [2021-06-05 15:44:48,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:44:48,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:44:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:44:48,056 INFO L87 Difference]: Start difference. First operand 21710 states and 65638 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:49,764 INFO L93 Difference]: Finished difference Result 24391 states and 73022 transitions. [2021-06-05 15:44:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:44:49,765 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:49,794 INFO L225 Difference]: With dead ends: 24391 [2021-06-05 15:44:49,794 INFO L226 Difference]: Without dead ends: 24026 [2021-06-05 15:44:49,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1403.6ms TimeCoverageRelationStatistics Valid=263, Invalid=3159, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:44:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24026 states. [2021-06-05 15:44:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24026 to 21496. [2021-06-05 15:44:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21496 states, 21495 states have (on average 3.0284252151663176) internal successors, (65096), 21495 states have internal predecessors, (65096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21496 states to 21496 states and 65096 transitions. [2021-06-05 15:44:50,062 INFO L78 Accepts]: Start accepts. Automaton has 21496 states and 65096 transitions. Word has length 54 [2021-06-05 15:44:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:50,062 INFO L482 AbstractCegarLoop]: Abstraction has 21496 states and 65096 transitions. [2021-06-05 15:44:50,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 21496 states and 65096 transitions. [2021-06-05 15:44:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:50,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:50,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:50,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:50,283 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2075616039, now seen corresponding path program 119 times [2021-06-05 15:44:50,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:50,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311749874] [2021-06-05 15:44:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:50,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311749874] [2021-06-05 15:44:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311749874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945790260] [2021-06-05 15:44:50,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:50,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:44:50,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:50,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:44:50,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:50,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:50,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:44:50,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:51,009 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 15:44:51,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:51,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:51,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:44:51,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:51,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:44:51,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:51,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:51,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:51,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:44:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:51,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945790260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:51,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:51,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 15:44:51,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828071346] [2021-06-05 15:44:51,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:44:51,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:44:51,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:44:51,247 INFO L87 Difference]: Start difference. First operand 21496 states and 65096 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:53,143 INFO L93 Difference]: Finished difference Result 24158 states and 72398 transitions. [2021-06-05 15:44:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:44:53,143 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:53,176 INFO L225 Difference]: With dead ends: 24158 [2021-06-05 15:44:53,176 INFO L226 Difference]: Without dead ends: 23790 [2021-06-05 15:44:53,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1346.1ms TimeCoverageRelationStatistics Valid=253, Invalid=3169, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:44:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23790 states. [2021-06-05 15:44:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23790 to 21503. [2021-06-05 15:44:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21503 states, 21502 states have (on average 3.028136917496047) internal successors, (65111), 21502 states have internal predecessors, (65111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21503 states to 21503 states and 65111 transitions. [2021-06-05 15:44:53,549 INFO L78 Accepts]: Start accepts. Automaton has 21503 states and 65111 transitions. Word has length 54 [2021-06-05 15:44:53,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:53,549 INFO L482 AbstractCegarLoop]: Abstraction has 21503 states and 65111 transitions. [2021-06-05 15:44:53,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 21503 states and 65111 transitions. [2021-06-05 15:44:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:53,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:53,568 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:53,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:44:53,773 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1172501167, now seen corresponding path program 120 times [2021-06-05 15:44:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:53,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728774717] [2021-06-05 15:44:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:54,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:54,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728774717] [2021-06-05 15:44:54,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728774717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:54,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483129601] [2021-06-05 15:44:54,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:54,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:44:54,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:44:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:54,397 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:44:54,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:54,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:44:54,498 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:54,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:44:54,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:54,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:44:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:54,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483129601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:54,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:54,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 15:44:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394590525] [2021-06-05 15:44:54,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:44:54,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:54,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:44:54,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:44:54,639 INFO L87 Difference]: Start difference. First operand 21503 states and 65111 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:56,442 INFO L93 Difference]: Finished difference Result 24269 states and 72692 transitions. [2021-06-05 15:44:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:44:56,443 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:56,473 INFO L225 Difference]: With dead ends: 24269 [2021-06-05 15:44:56,474 INFO L226 Difference]: Without dead ends: 23858 [2021-06-05 15:44:56,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1384.8ms TimeCoverageRelationStatistics Valid=254, Invalid=3286, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:44:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23858 states. [2021-06-05 15:44:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23858 to 21513. [2021-06-05 15:44:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21513 states, 21512 states have (on average 3.0280773521755298) internal successors, (65140), 21512 states have internal predecessors, (65140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21513 states to 21513 states and 65140 transitions. [2021-06-05 15:44:56,833 INFO L78 Accepts]: Start accepts. Automaton has 21513 states and 65140 transitions. Word has length 54 [2021-06-05 15:44:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:56,834 INFO L482 AbstractCegarLoop]: Abstraction has 21513 states and 65140 transitions. [2021-06-05 15:44:56,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 21513 states and 65140 transitions. [2021-06-05 15:44:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:56,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:56,854 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:57,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:57,057 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1834374125, now seen corresponding path program 121 times [2021-06-05 15:44:57,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:57,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552764626] [2021-06-05 15:44:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:57,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:57,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552764626] [2021-06-05 15:44:57,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552764626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:57,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351307438] [2021-06-05 15:44:57,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:44:57,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:57,674 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:44:57,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:44:57,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:57,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 15:44:57,813 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:57,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:44:57,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:57,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:44:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:57,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351307438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:57,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:57,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 15:44:57,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091251793] [2021-06-05 15:44:57,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:44:57,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:57,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:44:57,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:44:57,962 INFO L87 Difference]: Start difference. First operand 21513 states and 65140 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:59,860 INFO L93 Difference]: Finished difference Result 25230 states and 75230 transitions. [2021-06-05 15:44:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:44:59,860 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:59,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:59,894 INFO L225 Difference]: With dead ends: 25230 [2021-06-05 15:44:59,894 INFO L226 Difference]: Without dead ends: 24862 [2021-06-05 15:44:59,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1393.2ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:44:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24862 states. [2021-06-05 15:45:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24862 to 21541. [2021-06-05 15:45:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21541 states, 21540 states have (on average 3.027483751160631) internal successors, (65212), 21540 states have internal predecessors, (65212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21541 states to 21541 states and 65212 transitions. [2021-06-05 15:45:00,167 INFO L78 Accepts]: Start accepts. Automaton has 21541 states and 65212 transitions. Word has length 54 [2021-06-05 15:45:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:00,167 INFO L482 AbstractCegarLoop]: Abstraction has 21541 states and 65212 transitions. [2021-06-05 15:45:00,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21541 states and 65212 transitions. [2021-06-05 15:45:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:00,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:00,187 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:00,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 15:45:00,388 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 931259253, now seen corresponding path program 122 times [2021-06-05 15:45:00,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:00,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388764270] [2021-06-05 15:45:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:00,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:00,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388764270] [2021-06-05 15:45:00,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388764270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:00,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230854070] [2021-06-05 15:45:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:00,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:00,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:45:00,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:01,060 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:01,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:45:01,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:01,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-06-05 15:45:01,195 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:01,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:01,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:01,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:45:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:01,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230854070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:01,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:01,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 15:45:01,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543668084] [2021-06-05 15:45:01,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:45:01,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:45:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:45:01,328 INFO L87 Difference]: Start difference. First operand 21541 states and 65212 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:03,531 INFO L93 Difference]: Finished difference Result 25117 states and 74931 transitions. [2021-06-05 15:45:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:45:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:03,565 INFO L225 Difference]: With dead ends: 25117 [2021-06-05 15:45:03,565 INFO L226 Difference]: Without dead ends: 24722 [2021-06-05 15:45:03,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1453.8ms TimeCoverageRelationStatistics Valid=268, Invalid=3392, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:45:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24722 states. [2021-06-05 15:45:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24722 to 21534. [2021-06-05 15:45:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21534 states, 21533 states have (on average 3.0275855663400364) internal successors, (65193), 21533 states have internal predecessors, (65193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21534 states to 21534 states and 65193 transitions. [2021-06-05 15:45:03,834 INFO L78 Accepts]: Start accepts. Automaton has 21534 states and 65193 transitions. Word has length 54 [2021-06-05 15:45:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:03,835 INFO L482 AbstractCegarLoop]: Abstraction has 21534 states and 65193 transitions. [2021-06-05 15:45:03,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 21534 states and 65193 transitions. [2021-06-05 15:45:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:03,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:03,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:04,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:04,055 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:04,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1287932921, now seen corresponding path program 123 times [2021-06-05 15:45:04,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:04,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572428657] [2021-06-05 15:45:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:04,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:04,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572428657] [2021-06-05 15:45:04,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572428657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:04,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836234040] [2021-06-05 15:45:04,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:04,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:45:04,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:04,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 15:45:04,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:04,767 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:04,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:45:04,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:04,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:04,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:04,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-06-05 15:45:04,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:04,949 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 15:45:04,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 15:45:04,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:04,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:04,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:04,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:45:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:05,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836234040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:05,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:05,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 40 [2021-06-05 15:45:05,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408806298] [2021-06-05 15:45:05,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 15:45:05,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 15:45:05,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:45:05,270 INFO L87 Difference]: Start difference. First operand 21534 states and 65193 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:08,644 INFO L93 Difference]: Finished difference Result 23998 states and 71885 transitions. [2021-06-05 15:45:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:45:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:08,675 INFO L225 Difference]: With dead ends: 23998 [2021-06-05 15:45:08,676 INFO L226 Difference]: Without dead ends: 23763 [2021-06-05 15:45:08,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2605.1ms TimeCoverageRelationStatistics Valid=466, Invalid=6674, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:45:08,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23763 states. [2021-06-05 15:45:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23763 to 21881. [2021-06-05 15:45:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21881 states, 21880 states have (on average 3.020292504570384) internal successors, (66084), 21880 states have internal predecessors, (66084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21881 states to 21881 states and 66084 transitions. [2021-06-05 15:45:08,999 INFO L78 Accepts]: Start accepts. Automaton has 21881 states and 66084 transitions. Word has length 54 [2021-06-05 15:45:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:08,999 INFO L482 AbstractCegarLoop]: Abstraction has 21881 states and 66084 transitions. [2021-06-05 15:45:08,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 21881 states and 66084 transitions. [2021-06-05 15:45:09,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:09,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:09,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:09,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:09,220 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:09,220 INFO L82 PathProgramCache]: Analyzing trace with hash 811415479, now seen corresponding path program 124 times [2021-06-05 15:45:09,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:09,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30079625] [2021-06-05 15:45:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:09,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:09,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30079625] [2021-06-05 15:45:09,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30079625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:09,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273020095] [2021-06-05 15:45:09,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:09,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:09,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:45:09,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:09,765 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:45:09,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:09,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:09,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:09,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-06-05 15:45:09,893 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:09,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:09,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:09,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:09,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:45:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:10,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273020095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:10,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:10,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 15:45:10,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292919869] [2021-06-05 15:45:10,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:45:10,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:45:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:45:10,029 INFO L87 Difference]: Start difference. First operand 21881 states and 66084 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:11,911 INFO L93 Difference]: Finished difference Result 24247 states and 72561 transitions. [2021-06-05 15:45:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:45:11,911 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:11,941 INFO L225 Difference]: With dead ends: 24247 [2021-06-05 15:45:11,942 INFO L226 Difference]: Without dead ends: 23907 [2021-06-05 15:45:11,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1356.5ms TimeCoverageRelationStatistics Valid=262, Invalid=3398, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:45:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23907 states. [2021-06-05 15:45:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23907 to 21849. [2021-06-05 15:45:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21849 states, 21848 states have (on average 3.020779934090077) internal successors, (65998), 21848 states have internal predecessors, (65998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 65998 transitions. [2021-06-05 15:45:12,219 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 65998 transitions. Word has length 54 [2021-06-05 15:45:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:12,219 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 65998 transitions. [2021-06-05 15:45:12,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 65998 transitions. [2021-06-05 15:45:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:12,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:12,240 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:12,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:45:12,441 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash 107643771, now seen corresponding path program 125 times [2021-06-05 15:45:12,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:12,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058597222] [2021-06-05 15:45:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:12,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:12,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058597222] [2021-06-05 15:45:12,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058597222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:12,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040346380] [2021-06-05 15:45:12,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:12,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:45:12,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:12,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:45:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:13,322 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:45:13,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:13,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:45:13,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:13,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:13,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:13,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:13,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 15:45:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:13,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040346380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:13,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:13,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 42 [2021-06-05 15:45:13,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536858950] [2021-06-05 15:45:13,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:45:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:13,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:45:13,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:45:13,596 INFO L87 Difference]: Start difference. First operand 21849 states and 65998 transitions. Second operand has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:15,966 INFO L93 Difference]: Finished difference Result 24637 states and 73616 transitions. [2021-06-05 15:45:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:45:15,967 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:15,997 INFO L225 Difference]: With dead ends: 24637 [2021-06-05 15:45:15,998 INFO L226 Difference]: Without dead ends: 24221 [2021-06-05 15:45:15,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1900.8ms TimeCoverageRelationStatistics Valid=327, Invalid=4503, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:45:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24221 states. [2021-06-05 15:45:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24221 to 21994. [2021-06-05 15:45:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21994 states, 21993 states have (on average 3.017687446005547) internal successors, (66368), 21993 states have internal predecessors, (66368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21994 states to 21994 states and 66368 transitions. [2021-06-05 15:45:16,278 INFO L78 Accepts]: Start accepts. Automaton has 21994 states and 66368 transitions. Word has length 54 [2021-06-05 15:45:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:16,278 INFO L482 AbstractCegarLoop]: Abstraction has 21994 states and 66368 transitions. [2021-06-05 15:45:16,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 21994 states and 66368 transitions. [2021-06-05 15:45:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:16,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:16,299 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:16,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 15:45:16,499 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:16,499 INFO L82 PathProgramCache]: Analyzing trace with hash -365517221, now seen corresponding path program 126 times [2021-06-05 15:45:16,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:16,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938523738] [2021-06-05 15:45:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:16,774 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-06-05 15:45:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:16,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938523738] [2021-06-05 15:45:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938523738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715447362] [2021-06-05 15:45:16,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:17,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:45:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:45:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:17,237 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:17,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:45:17,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:17,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:45:17,343 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:17,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:17,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:45:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:17,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715447362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:17,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:17,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:17,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242116065] [2021-06-05 15:45:17,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:17,484 INFO L87 Difference]: Start difference. First operand 21994 states and 66368 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:19,456 INFO L93 Difference]: Finished difference Result 25411 states and 75653 transitions. [2021-06-05 15:45:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:45:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:19,489 INFO L225 Difference]: With dead ends: 25411 [2021-06-05 15:45:19,489 INFO L226 Difference]: Without dead ends: 25043 [2021-06-05 15:45:19,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1488.7ms TimeCoverageRelationStatistics Valid=267, Invalid=3273, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:45:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25043 states. [2021-06-05 15:45:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25043 to 22001. [2021-06-05 15:45:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22001 states, 22000 states have (on average 3.0174090909090907) internal successors, (66383), 22000 states have internal predecessors, (66383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22001 states to 22001 states and 66383 transitions. [2021-06-05 15:45:19,776 INFO L78 Accepts]: Start accepts. Automaton has 22001 states and 66383 transitions. Word has length 54 [2021-06-05 15:45:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:19,776 INFO L482 AbstractCegarLoop]: Abstraction has 22001 states and 66383 transitions. [2021-06-05 15:45:19,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 22001 states and 66383 transitions. [2021-06-05 15:45:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:19,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:19,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:19,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:19,997 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1268632093, now seen corresponding path program 127 times [2021-06-05 15:45:19,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:19,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073305131] [2021-06-05 15:45:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:20,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:20,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073305131] [2021-06-05 15:45:20,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073305131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:20,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022243387] [2021-06-05 15:45:20,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:45:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:20,661 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:20,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:45:20,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:20,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:20,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:20,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-06-05 15:45:20,768 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:20,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:45:20,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:20,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:20,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:20,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:45:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:20,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022243387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:20,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:20,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:20,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388828469] [2021-06-05 15:45:20,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:20,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:20,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:20,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:20,907 INFO L87 Difference]: Start difference. First operand 22001 states and 66383 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:22,730 INFO L93 Difference]: Finished difference Result 24839 states and 74147 transitions. [2021-06-05 15:45:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:45:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:22,759 INFO L225 Difference]: With dead ends: 24839 [2021-06-05 15:45:22,760 INFO L226 Difference]: Without dead ends: 24428 [2021-06-05 15:45:22,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1445.6ms TimeCoverageRelationStatistics Valid=265, Invalid=3395, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:45:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24428 states. [2021-06-05 15:45:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24428 to 21966. [2021-06-05 15:45:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21966 states, 21965 states have (on average 3.018074208968814) internal successors, (66292), 21965 states have internal predecessors, (66292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21966 states to 21966 states and 66292 transitions. [2021-06-05 15:45:23,039 INFO L78 Accepts]: Start accepts. Automaton has 21966 states and 66292 transitions. Word has length 54 [2021-06-05 15:45:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:23,040 INFO L482 AbstractCegarLoop]: Abstraction has 21966 states and 66292 transitions. [2021-06-05 15:45:23,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 21966 states and 66292 transitions. [2021-06-05 15:45:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:23,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:23,061 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:23,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 15:45:23,261 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash -606759135, now seen corresponding path program 128 times [2021-06-05 15:45:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:23,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663163204] [2021-06-05 15:45:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:23,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:23,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663163204] [2021-06-05 15:45:23,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663163204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:23,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640950077] [2021-06-05 15:45:23,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:23,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:23,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:45:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:23,843 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:45:23,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:23,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:29 [2021-06-05 15:45:23,974 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:23,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:45:23,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:23,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:45:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640950077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:24,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:24,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:24,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899334130] [2021-06-05 15:45:24,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:24,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:24,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:24,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:24,118 INFO L87 Difference]: Start difference. First operand 21966 states and 66292 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:26,149 INFO L93 Difference]: Finished difference Result 25605 states and 76167 transitions. [2021-06-05 15:45:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:45:26,149 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:26,182 INFO L225 Difference]: With dead ends: 25605 [2021-06-05 15:45:26,182 INFO L226 Difference]: Without dead ends: 25237 [2021-06-05 15:45:26,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1433.2ms TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:45:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-06-05 15:45:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 21994. [2021-06-05 15:45:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21994 states, 21993 states have (on average 3.0175055699540763) internal successors, (66364), 21993 states have internal predecessors, (66364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21994 states to 21994 states and 66364 transitions. [2021-06-05 15:45:26,457 INFO L78 Accepts]: Start accepts. Automaton has 21994 states and 66364 transitions. Word has length 54 [2021-06-05 15:45:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:26,457 INFO L482 AbstractCegarLoop]: Abstraction has 21994 states and 66364 transitions. [2021-06-05 15:45:26,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 21994 states and 66364 transitions. [2021-06-05 15:45:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:26,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:26,478 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:26,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 15:45:26,680 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:26,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:26,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1509874007, now seen corresponding path program 129 times [2021-06-05 15:45:26,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:26,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913360605] [2021-06-05 15:45:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:27,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:27,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913360605] [2021-06-05 15:45:27,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913360605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:27,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198689671] [2021-06-05 15:45:27,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:27,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:45:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 15:45:27,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:27,389 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:45:27,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:27,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:27,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:27,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:45:27,585 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:27,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:45:27,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:27,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:27,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:27,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:45:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:27,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198689671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:27,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:27,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 41 [2021-06-05 15:45:27,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925333693] [2021-06-05 15:45:27,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:45:27,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:27,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:45:27,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1599, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:45:27,732 INFO L87 Difference]: Start difference. First operand 21994 states and 66364 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:30,301 INFO L93 Difference]: Finished difference Result 25692 states and 76400 transitions. [2021-06-05 15:45:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:45:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:30,334 INFO L225 Difference]: With dead ends: 25692 [2021-06-05 15:45:30,334 INFO L226 Difference]: Without dead ends: 25297 [2021-06-05 15:45:30,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1777.6ms TimeCoverageRelationStatistics Valid=352, Invalid=4760, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:45:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25297 states. [2021-06-05 15:45:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25297 to 21987. [2021-06-05 15:45:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21987 states, 21986 states have (on average 3.0176021104339124) internal successors, (66345), 21986 states have internal predecessors, (66345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21987 states to 21987 states and 66345 transitions. [2021-06-05 15:45:30,691 INFO L78 Accepts]: Start accepts. Automaton has 21987 states and 66345 transitions. Word has length 54 [2021-06-05 15:45:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:30,691 INFO L482 AbstractCegarLoop]: Abstraction has 21987 states and 66345 transitions. [2021-06-05 15:45:30,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 21987 states and 66345 transitions. [2021-06-05 15:45:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:30,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:30,712 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:30,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 15:45:30,912 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash 565901115, now seen corresponding path program 130 times [2021-06-05 15:45:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:30,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969676237] [2021-06-05 15:45:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:31,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:31,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969676237] [2021-06-05 15:45:31,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969676237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:31,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353866503] [2021-06-05 15:45:31,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:31,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:31,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:45:31,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:31,499 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:31,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:45:31,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:31,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-06-05 15:45:31,627 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:31,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:31,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:31,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:45:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:31,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353866503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:31,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:31,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588986990] [2021-06-05 15:45:31,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:31,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:31,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:31,765 INFO L87 Difference]: Start difference. First operand 21987 states and 66345 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:33,763 INFO L93 Difference]: Finished difference Result 24409 states and 72933 transitions. [2021-06-05 15:45:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:45:33,763 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:33,793 INFO L225 Difference]: With dead ends: 24409 [2021-06-05 15:45:33,793 INFO L226 Difference]: Without dead ends: 24018 [2021-06-05 15:45:33,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1423.1ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:45:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24018 states. [2021-06-05 15:45:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24018 to 21861. [2021-06-05 15:45:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21861 states, 21860 states have (on average 3.0205855443732847) internal successors, (66030), 21860 states have internal predecessors, (66030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21861 states to 21861 states and 66030 transitions. [2021-06-05 15:45:34,066 INFO L78 Accepts]: Start accepts. Automaton has 21861 states and 66030 transitions. Word has length 54 [2021-06-05 15:45:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:34,067 INFO L482 AbstractCegarLoop]: Abstraction has 21861 states and 66030 transitions. [2021-06-05 15:45:34,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21861 states and 66030 transitions. [2021-06-05 15:45:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:34,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:34,087 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:34,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:34,288 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:34,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2062221955, now seen corresponding path program 131 times [2021-06-05 15:45:34,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:34,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558921081] [2021-06-05 15:45:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:34,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:34,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558921081] [2021-06-05 15:45:34,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558921081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:34,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471104385] [2021-06-05 15:45:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:34,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:45:34,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:45:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:34,997 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:34,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:45:34,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:45:35,069 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:35,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:35,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:45:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:35,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471104385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:35,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:35,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 15:45:35,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439368816] [2021-06-05 15:45:35,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:45:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:35,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:45:35,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:45:35,209 INFO L87 Difference]: Start difference. First operand 21861 states and 66030 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:37,291 INFO L93 Difference]: Finished difference Result 24866 states and 74208 transitions. [2021-06-05 15:45:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:45:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:37,322 INFO L225 Difference]: With dead ends: 24866 [2021-06-05 15:45:37,322 INFO L226 Difference]: Without dead ends: 24450 [2021-06-05 15:45:37,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1475.8ms TimeCoverageRelationStatistics Valid=268, Invalid=3392, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:45:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24450 states. [2021-06-05 15:45:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24450 to 22021. [2021-06-05 15:45:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22021 states, 22020 states have (on average 3.017529518619437) internal successors, (66446), 22020 states have internal predecessors, (66446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22021 states to 22021 states and 66446 transitions. [2021-06-05 15:45:37,617 INFO L78 Accepts]: Start accepts. Automaton has 22021 states and 66446 transitions. Word has length 54 [2021-06-05 15:45:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:37,617 INFO L482 AbstractCegarLoop]: Abstraction has 22021 states and 66446 transitions. [2021-06-05 15:45:37,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 22021 states and 66446 transitions. [2021-06-05 15:45:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:37,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:37,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:37,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:37,845 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1589060963, now seen corresponding path program 132 times [2021-06-05 15:45:37,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:37,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959546934] [2021-06-05 15:45:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:38,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:38,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959546934] [2021-06-05 15:45:38,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959546934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:38,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637603879] [2021-06-05 15:45:38,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:38,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:45:38,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:45:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:38,528 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:38,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:45:38,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:38,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:38,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:38,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:45:38,634 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:38,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:45:38,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:38,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:38,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:38,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 15:45:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637603879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221638691] [2021-06-05 15:45:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:38,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:38,773 INFO L87 Difference]: Start difference. First operand 22021 states and 66446 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:40,634 INFO L93 Difference]: Finished difference Result 25640 states and 76245 transitions. [2021-06-05 15:45:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:45:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:40,668 INFO L225 Difference]: With dead ends: 25640 [2021-06-05 15:45:40,668 INFO L226 Difference]: Without dead ends: 25272 [2021-06-05 15:45:40,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1480.2ms TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:45:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25272 states. [2021-06-05 15:45:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25272 to 22028. [2021-06-05 15:45:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22028 states, 22027 states have (on average 3.0172515549098833) internal successors, (66461), 22027 states have internal predecessors, (66461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22028 states to 22028 states and 66461 transitions. [2021-06-05 15:45:41,057 INFO L78 Accepts]: Start accepts. Automaton has 22028 states and 66461 transitions. Word has length 54 [2021-06-05 15:45:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:41,057 INFO L482 AbstractCegarLoop]: Abstraction has 22028 states and 66461 transitions. [2021-06-05 15:45:41,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22028 states and 66461 transitions. [2021-06-05 15:45:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:41,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:41,078 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:41,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:41,278 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash 685946091, now seen corresponding path program 133 times [2021-06-05 15:45:41,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:41,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619955776] [2021-06-05 15:45:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:41,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619955776] [2021-06-05 15:45:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619955776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:41,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578518283] [2021-06-05 15:45:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:45:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:41,901 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:41,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:45:41,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:41,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-06-05 15:45:42,006 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:42,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:45:42,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:42,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:42,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:42,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:45:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:42,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578518283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:42,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:42,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:42,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050999096] [2021-06-05 15:45:42,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:42,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:42,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:42,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:42,153 INFO L87 Difference]: Start difference. First operand 22028 states and 66461 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:44,125 INFO L93 Difference]: Finished difference Result 25068 states and 74739 transitions. [2021-06-05 15:45:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:45:44,126 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:44,159 INFO L225 Difference]: With dead ends: 25068 [2021-06-05 15:45:44,159 INFO L226 Difference]: Without dead ends: 24657 [2021-06-05 15:45:44,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1488.6ms TimeCoverageRelationStatistics Valid=267, Invalid=3515, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:45:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24657 states. [2021-06-05 15:45:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24657 to 21993. [2021-06-05 15:45:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21993 states, 21992 states have (on average 3.0179156056747907) internal successors, (66370), 21992 states have internal predecessors, (66370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21993 states to 21993 states and 66370 transitions. [2021-06-05 15:45:44,435 INFO L78 Accepts]: Start accepts. Automaton has 21993 states and 66370 transitions. Word has length 54 [2021-06-05 15:45:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:44,436 INFO L482 AbstractCegarLoop]: Abstraction has 21993 states and 66370 transitions. [2021-06-05 15:45:44,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21993 states and 66370 transitions. [2021-06-05 15:45:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:44,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:44,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:44,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 15:45:44,665 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:44,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1347819049, now seen corresponding path program 134 times [2021-06-05 15:45:44,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:44,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666307650] [2021-06-05 15:45:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:45,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:45,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666307650] [2021-06-05 15:45:45,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666307650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:45,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521582389] [2021-06-05 15:45:45,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:45,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:45,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:45,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:45:45,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:45,243 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:45,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:45:45,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:45,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:45,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:45,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:25 [2021-06-05 15:45:45,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:45,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:45:45,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:45,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:45,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:45,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:45:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:45,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521582389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:45,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:45,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:45,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790763028] [2021-06-05 15:45:45,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:45,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:45,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:45,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:45,512 INFO L87 Difference]: Start difference. First operand 21993 states and 66370 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:47,597 INFO L93 Difference]: Finished difference Result 25834 states and 76759 transitions. [2021-06-05 15:45:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:45:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:47,631 INFO L225 Difference]: With dead ends: 25834 [2021-06-05 15:45:47,631 INFO L226 Difference]: Without dead ends: 25466 [2021-06-05 15:45:47,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1506.8ms TimeCoverageRelationStatistics Valid=280, Invalid=3502, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:45:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25466 states. [2021-06-05 15:45:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25466 to 22021. [2021-06-05 15:45:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22021 states, 22020 states have (on average 3.0173478655767485) internal successors, (66442), 22020 states have internal predecessors, (66442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22021 states to 22021 states and 66442 transitions. [2021-06-05 15:45:47,916 INFO L78 Accepts]: Start accepts. Automaton has 22021 states and 66442 transitions. Word has length 54 [2021-06-05 15:45:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:47,916 INFO L482 AbstractCegarLoop]: Abstraction has 22021 states and 66442 transitions. [2021-06-05 15:45:47,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 22021 states and 66442 transitions. [2021-06-05 15:45:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:47,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:47,938 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:48,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:48,138 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:48,139 INFO L82 PathProgramCache]: Analyzing trace with hash 444704177, now seen corresponding path program 135 times [2021-06-05 15:45:48,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:48,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6401351] [2021-06-05 15:45:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:48,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:48,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6401351] [2021-06-05 15:45:48,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6401351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:48,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438826023] [2021-06-05 15:45:48,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:48,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:45:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:48,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 15:45:48,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:48,896 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:48,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:45:48,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:48,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-06-05 15:45:49,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:49,080 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 15:45:49,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 15:45:49,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:49,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:49,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:49,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:45:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:49,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438826023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:49,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:49,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 41 [2021-06-05 15:45:49,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872904435] [2021-06-05 15:45:49,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:45:49,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:45:49,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:45:49,330 INFO L87 Difference]: Start difference. First operand 22021 states and 66442 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:52,511 INFO L93 Difference]: Finished difference Result 25688 states and 76292 transitions. [2021-06-05 15:45:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:45:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:52,545 INFO L225 Difference]: With dead ends: 25688 [2021-06-05 15:45:52,545 INFO L226 Difference]: Without dead ends: 25382 [2021-06-05 15:45:52,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2496.0ms TimeCoverageRelationStatistics Valid=474, Invalid=6332, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:45:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25382 states. [2021-06-05 15:45:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25382 to 22245. [2021-06-05 15:45:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22245 states, 22244 states have (on average 3.0129023556914225) internal successors, (67019), 22244 states have internal predecessors, (67019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22245 states to 22245 states and 67019 transitions. [2021-06-05 15:45:52,821 INFO L78 Accepts]: Start accepts. Automaton has 22245 states and 67019 transitions. Word has length 54 [2021-06-05 15:45:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:52,821 INFO L482 AbstractCegarLoop]: Abstraction has 22245 states and 67019 transitions. [2021-06-05 15:45:52,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 22245 states and 67019 transitions. [2021-06-05 15:45:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:52,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:52,841 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:53,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 15:45:53,041 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1655350275, now seen corresponding path program 136 times [2021-06-05 15:45:53,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:53,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650188607] [2021-06-05 15:45:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:53,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:53,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650188607] [2021-06-05 15:45:53,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650188607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:53,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302136119] [2021-06-05 15:45:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:53,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:53,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:45:53,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:53,612 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:45:53,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:53,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:53,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:53,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 15:45:53,743 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:53,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:53,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:53,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:53,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:53,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:45:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:53,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302136119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:53,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:53,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:53,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528715929] [2021-06-05 15:45:53,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:53,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:53,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:53,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:53,879 INFO L87 Difference]: Start difference. First operand 22245 states and 67019 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:56,095 INFO L93 Difference]: Finished difference Result 25868 states and 76861 transitions. [2021-06-05 15:45:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:45:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:56,128 INFO L225 Difference]: With dead ends: 25868 [2021-06-05 15:45:56,128 INFO L226 Difference]: Without dead ends: 25530 [2021-06-05 15:45:56,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1450.1ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:45:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25530 states. [2021-06-05 15:45:56,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25530 to 22014. [2021-06-05 15:45:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22014 states, 22013 states have (on average 3.017444237496025) internal successors, (66423), 22013 states have internal predecessors, (66423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22014 states to 22014 states and 66423 transitions. [2021-06-05 15:45:56,405 INFO L78 Accepts]: Start accepts. Automaton has 22014 states and 66423 transitions. Word has length 54 [2021-06-05 15:45:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:56,406 INFO L482 AbstractCegarLoop]: Abstraction has 22014 states and 66423 transitions. [2021-06-05 15:45:56,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 22014 states and 66423 transitions. [2021-06-05 15:45:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:56,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:56,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:56,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:56,626 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:56,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1774487997, now seen corresponding path program 137 times [2021-06-05 15:45:56,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:56,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373438141] [2021-06-05 15:45:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:57,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:57,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373438141] [2021-06-05 15:45:57,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373438141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:57,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000607494] [2021-06-05 15:45:57,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:57,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:45:57,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:45:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:57,291 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:57,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:45:57,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:57,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:57,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:57,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:45:57,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:45:57,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:45:57,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:57,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:57,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:57,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:45:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:45:57,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000607494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:57,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:57,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:45:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546716583] [2021-06-05 15:45:57,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:45:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:45:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:57,567 INFO L87 Difference]: Start difference. First operand 22014 states and 66423 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:59,873 INFO L93 Difference]: Finished difference Result 24547 states and 73295 transitions. [2021-06-05 15:45:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:45:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:59,904 INFO L225 Difference]: With dead ends: 24547 [2021-06-05 15:45:59,904 INFO L226 Difference]: Without dead ends: 24156 [2021-06-05 15:45:59,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1600.7ms TimeCoverageRelationStatistics Valid=274, Invalid=3758, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:45:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24156 states. [2021-06-05 15:46:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24156 to 21909. [2021-06-05 15:46:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21909 states, 21908 states have (on average 3.0198101150264742) internal successors, (66158), 21908 states have internal predecessors, (66158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21909 states to 21909 states and 66158 transitions. [2021-06-05 15:46:00,173 INFO L78 Accepts]: Start accepts. Automaton has 21909 states and 66158 transitions. Word has length 54 [2021-06-05 15:46:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:00,173 INFO L482 AbstractCegarLoop]: Abstraction has 21909 states and 66158 transitions. [2021-06-05 15:46:00,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 21909 states and 66158 transitions. [2021-06-05 15:46:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:00,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:00,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:00,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 15:46:00,394 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash 897417097, now seen corresponding path program 138 times [2021-06-05 15:46:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:00,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337561112] [2021-06-05 15:46:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:00,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:00,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337561112] [2021-06-05 15:46:00,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337561112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:00,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612288592] [2021-06-05 15:46:00,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:00,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:46:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:46:00,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:00,974 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:00,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:46:00,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:00,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 15:46:01,136 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:01,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:46:01,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:01,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:46:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:01,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612288592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:01,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:01,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:46:01,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771653571] [2021-06-05 15:46:01,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:46:01,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:01,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:46:01,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:46:01,272 INFO L87 Difference]: Start difference. First operand 21909 states and 66158 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:03,550 INFO L93 Difference]: Finished difference Result 26122 states and 77506 transitions. [2021-06-05 15:46:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:46:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:03,586 INFO L225 Difference]: With dead ends: 26122 [2021-06-05 15:46:03,586 INFO L226 Difference]: Without dead ends: 25754 [2021-06-05 15:46:03,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1521.9ms TimeCoverageRelationStatistics Valid=291, Invalid=3491, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:46:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25754 states. [2021-06-05 15:46:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25754 to 21949. [2021-06-05 15:46:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21949 states, 21948 states have (on average 3.019045015491161) internal successors, (66262), 21948 states have internal predecessors, (66262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21949 states to 21949 states and 66262 transitions. [2021-06-05 15:46:03,864 INFO L78 Accepts]: Start accepts. Automaton has 21949 states and 66262 transitions. Word has length 54 [2021-06-05 15:46:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:03,864 INFO L482 AbstractCegarLoop]: Abstraction has 21949 states and 66262 transitions. [2021-06-05 15:46:03,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21949 states and 66262 transitions. [2021-06-05 15:46:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:03,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:03,884 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:04,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 15:46:04,084 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash -5697775, now seen corresponding path program 139 times [2021-06-05 15:46:04,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:04,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110734890] [2021-06-05 15:46:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:04,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110734890] [2021-06-05 15:46:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110734890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898839714] [2021-06-05 15:46:04,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:04,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:04,623 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:04,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:46:04,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:04,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:46:04,780 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:04,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:04,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:04,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:04,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898839714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:04,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:04,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:46:04,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215650470] [2021-06-05 15:46:04,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:46:04,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:46:04,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:46:04,917 INFO L87 Difference]: Start difference. First operand 21949 states and 66262 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:07,234 INFO L93 Difference]: Finished difference Result 26161 states and 77609 transitions. [2021-06-05 15:46:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:46:07,234 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:07,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:07,270 INFO L225 Difference]: With dead ends: 26161 [2021-06-05 15:46:07,270 INFO L226 Difference]: Without dead ends: 25766 [2021-06-05 15:46:07,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1495.1ms TimeCoverageRelationStatistics Valid=305, Invalid=3727, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:46:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25766 states. [2021-06-05 15:46:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25766 to 21942. [2021-06-05 15:46:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21942 states, 21941 states have (on average 3.0191422451118908) internal successors, (66243), 21941 states have internal predecessors, (66243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21942 states to 21942 states and 66243 transitions. [2021-06-05 15:46:07,661 INFO L78 Accepts]: Start accepts. Automaton has 21942 states and 66243 transitions. Word has length 54 [2021-06-05 15:46:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:07,661 INFO L482 AbstractCegarLoop]: Abstraction has 21942 states and 66243 transitions. [2021-06-05 15:46:07,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21942 states and 66243 transitions. [2021-06-05 15:46:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:07,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:07,681 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:07,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:07,885 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2070077347, now seen corresponding path program 140 times [2021-06-05 15:46:07,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:07,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711885039] [2021-06-05 15:46:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:08,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:08,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711885039] [2021-06-05 15:46:08,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711885039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:08,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793048182] [2021-06-05 15:46:08,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:08,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:08,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:08,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:08,406 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:08,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:46:08,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:08,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:22 [2021-06-05 15:46:08,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:08,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:08,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:08,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:08,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793048182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:08,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:08,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 15:46:08,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73042635] [2021-06-05 15:46:08,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:46:08,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:46:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:46:08,701 INFO L87 Difference]: Start difference. First operand 21942 states and 66243 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:10,831 INFO L93 Difference]: Finished difference Result 25642 states and 76164 transitions. [2021-06-05 15:46:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:46:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:10,864 INFO L225 Difference]: With dead ends: 25642 [2021-06-05 15:46:10,864 INFO L226 Difference]: Without dead ends: 25251 [2021-06-05 15:46:10,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1489.2ms TimeCoverageRelationStatistics Valid=292, Invalid=3868, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:46:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25251 states. [2021-06-05 15:46:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25251 to 21921. [2021-06-05 15:46:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21921 states, 21920 states have (on average 3.019616788321168) internal successors, (66190), 21920 states have internal predecessors, (66190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21921 states to 21921 states and 66190 transitions. [2021-06-05 15:46:11,140 INFO L78 Accepts]: Start accepts. Automaton has 21921 states and 66190 transitions. Word has length 54 [2021-06-05 15:46:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:11,140 INFO L482 AbstractCegarLoop]: Abstraction has 21921 states and 66190 transitions. [2021-06-05 15:46:11,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21921 states and 66190 transitions. [2021-06-05 15:46:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:11,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:11,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:11,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-06-05 15:46:11,361 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2110866603, now seen corresponding path program 141 times [2021-06-05 15:46:11,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:11,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329129277] [2021-06-05 15:46:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:11,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:11,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329129277] [2021-06-05 15:46:11,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329129277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:11,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439670818] [2021-06-05 15:46:11,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:11,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:46:11,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:46:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:12,030 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:12,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:46:12,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:12,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:12,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:12,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 15:46:12,188 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:12,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:46:12,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:12,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:12,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:12,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:46:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:12,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439670818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:12,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:12,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 39 [2021-06-05 15:46:12,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057188049] [2021-06-05 15:46:12,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:46:12,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:46:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:46:12,330 INFO L87 Difference]: Start difference. First operand 21921 states and 66190 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:14,926 INFO L93 Difference]: Finished difference Result 24717 states and 73758 transitions. [2021-06-05 15:46:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:46:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:14,956 INFO L225 Difference]: With dead ends: 24717 [2021-06-05 15:46:14,956 INFO L226 Difference]: Without dead ends: 24326 [2021-06-05 15:46:14,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1682.3ms TimeCoverageRelationStatistics Valid=333, Invalid=4779, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:46:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24326 states. [2021-06-05 15:46:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24326 to 22030. [2021-06-05 15:46:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22030 states, 22029 states have (on average 3.0175677516001636) internal successors, (66474), 22029 states have internal predecessors, (66474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22030 states to 22030 states and 66474 transitions. [2021-06-05 15:46:15,227 INFO L78 Accepts]: Start accepts. Automaton has 22030 states and 66474 transitions. Word has length 54 [2021-06-05 15:46:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:15,227 INFO L482 AbstractCegarLoop]: Abstraction has 22030 states and 66474 transitions. [2021-06-05 15:46:15,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 22030 states and 66474 transitions. [2021-06-05 15:46:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:15,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:15,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:15,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:15,448 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:15,449 INFO L82 PathProgramCache]: Analyzing trace with hash -726971679, now seen corresponding path program 142 times [2021-06-05 15:46:15,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:15,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603764876] [2021-06-05 15:46:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:15,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603764876] [2021-06-05 15:46:15,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603764876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369269816] [2021-06-05 15:46:15,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:15,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:16,202 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:16,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:46:16,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:16,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:16,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:16,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 15:46:16,276 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:16,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:46:16,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:16,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:16,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:16,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:46:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:16,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369269816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:16,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:16,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:46:16,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385777409] [2021-06-05 15:46:16,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:46:16,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:16,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:46:16,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:16,420 INFO L87 Difference]: Start difference. First operand 22030 states and 66474 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:18,518 INFO L93 Difference]: Finished difference Result 24881 states and 74266 transitions. [2021-06-05 15:46:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:46:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:18,624 INFO L225 Difference]: With dead ends: 24881 [2021-06-05 15:46:18,624 INFO L226 Difference]: Without dead ends: 24465 [2021-06-05 15:46:18,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1588.9ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:46:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24465 states. [2021-06-05 15:46:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24465 to 22235. [2021-06-05 15:46:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0135828011154087) internal successors, (67004), 22234 states have internal predecessors, (67004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67004 transitions. [2021-06-05 15:46:18,881 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67004 transitions. Word has length 54 [2021-06-05 15:46:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:18,882 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67004 transitions. [2021-06-05 15:46:18,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67004 transitions. [2021-06-05 15:46:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:18,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:18,903 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:19,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:19,105 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1200132671, now seen corresponding path program 143 times [2021-06-05 15:46:19,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:19,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875675121] [2021-06-05 15:46:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:19,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:19,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875675121] [2021-06-05 15:46:19,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875675121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:19,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622240429] [2021-06-05 15:46:19,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:19,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:46:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:46:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:19,774 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:19,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:46:19,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:19,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:39 [2021-06-05 15:46:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:19,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:19,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:46:19,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:19,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 15:46:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:20,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622240429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:20,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:20,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:46:20,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037835412] [2021-06-05 15:46:20,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:46:20,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:20,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:46:20,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:46:20,050 INFO L87 Difference]: Start difference. First operand 22235 states and 67004 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:22,211 INFO L93 Difference]: Finished difference Result 25017 states and 74620 transitions. [2021-06-05 15:46:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:46:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:22,244 INFO L225 Difference]: With dead ends: 25017 [2021-06-05 15:46:22,244 INFO L226 Difference]: Without dead ends: 24649 [2021-06-05 15:46:22,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1527.0ms TimeCoverageRelationStatistics Valid=276, Invalid=3506, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:46:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24649 states. [2021-06-05 15:46:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24649 to 22242. [2021-06-05 15:46:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22242 states, 22241 states have (on average 3.013308754102783) internal successors, (67019), 22241 states have internal predecessors, (67019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22242 states to 22242 states and 67019 transitions. [2021-06-05 15:46:22,528 INFO L78 Accepts]: Start accepts. Automaton has 22242 states and 67019 transitions. Word has length 54 [2021-06-05 15:46:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:22,528 INFO L482 AbstractCegarLoop]: Abstraction has 22242 states and 67019 transitions. [2021-06-05 15:46:22,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 22242 states and 67019 transitions. [2021-06-05 15:46:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:22,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:22,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:22,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:22,750 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:22,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2103247543, now seen corresponding path program 144 times [2021-06-05 15:46:22,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:22,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575444161] [2021-06-05 15:46:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:23,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:23,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575444161] [2021-06-05 15:46:23,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575444161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:23,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886617250] [2021-06-05 15:46:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:23,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:46:23,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:23,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:23,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 15:46:23,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:23,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:23,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:23,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:30 [2021-06-05 15:46:23,733 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:23,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:23,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:23,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:23,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:23,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:23,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886617250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:23,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:23,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 15:46:23,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782132940] [2021-06-05 15:46:23,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:23,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:23,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:23,885 INFO L87 Difference]: Start difference. First operand 22242 states and 67019 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:26,467 INFO L93 Difference]: Finished difference Result 25133 states and 74928 transitions. [2021-06-05 15:46:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:46:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:26,499 INFO L225 Difference]: With dead ends: 25133 [2021-06-05 15:46:26,500 INFO L226 Difference]: Without dead ends: 24722 [2021-06-05 15:46:26,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 1840.5ms TimeCoverageRelationStatistics Valid=346, Invalid=4484, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:46:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24722 states. [2021-06-05 15:46:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24722 to 22207. [2021-06-05 15:46:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22207 states, 22206 states have (on average 3.0139601909393856) internal successors, (66928), 22206 states have internal predecessors, (66928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22207 states to 22207 states and 66928 transitions. [2021-06-05 15:46:26,779 INFO L78 Accepts]: Start accepts. Automaton has 22207 states and 66928 transitions. Word has length 54 [2021-06-05 15:46:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:26,779 INFO L482 AbstractCegarLoop]: Abstraction has 22207 states and 66928 transitions. [2021-06-05 15:46:26,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 22207 states and 66928 transitions. [2021-06-05 15:46:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:26,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:26,801 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:27,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 15:46:27,001 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:27,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1441374585, now seen corresponding path program 145 times [2021-06-05 15:46:27,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:27,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256335932] [2021-06-05 15:46:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:27,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256335932] [2021-06-05 15:46:27,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256335932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871992491] [2021-06-05 15:46:27,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:27,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:27,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:27,614 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:27,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:46:27,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:27,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-06-05 15:46:27,749 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:27,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:46:27,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:27,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 15:46:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:27,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871992491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:27,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:27,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:46:27,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592217466] [2021-06-05 15:46:27,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:46:27,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:46:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:46:27,891 INFO L87 Difference]: Start difference. First operand 22207 states and 66928 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:29,831 INFO L93 Difference]: Finished difference Result 26041 states and 77324 transitions. [2021-06-05 15:46:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:46:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:29,864 INFO L225 Difference]: With dead ends: 26041 [2021-06-05 15:46:29,865 INFO L226 Difference]: Without dead ends: 25673 [2021-06-05 15:46:29,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1557.2ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:46:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25673 states. [2021-06-05 15:46:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25673 to 22235. [2021-06-05 15:46:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0134028964648736) internal successors, (67000), 22234 states have internal predecessors, (67000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67000 transitions. [2021-06-05 15:46:30,145 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67000 transitions. Word has length 54 [2021-06-05 15:46:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:30,146 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67000 transitions. [2021-06-05 15:46:30,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67000 transitions. [2021-06-05 15:46:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:30,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:30,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:30,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 15:46:30,367 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:30,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1950477839, now seen corresponding path program 146 times [2021-06-05 15:46:30,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:30,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160465685] [2021-06-05 15:46:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:30,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160465685] [2021-06-05 15:46:30,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160465685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:30,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532294614] [2021-06-05 15:46:30,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:30,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:30,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:30,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:31,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:31,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:31,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:46:31,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:31,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:31,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:31,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 15:46:31,205 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:31,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:31,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:31,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:31,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:31,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532294614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:31,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:31,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 15:46:31,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976616550] [2021-06-05 15:46:31,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:31,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:31,350 INFO L87 Difference]: Start difference. First operand 22235 states and 67000 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:33,915 INFO L93 Difference]: Finished difference Result 25981 states and 77167 transitions. [2021-06-05 15:46:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:46:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:33,949 INFO L225 Difference]: With dead ends: 25981 [2021-06-05 15:46:33,949 INFO L226 Difference]: Without dead ends: 25586 [2021-06-05 15:46:33,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1819.5ms TimeCoverageRelationStatistics Valid=359, Invalid=4611, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:46:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25586 states. [2021-06-05 15:46:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25586 to 22228. [2021-06-05 15:46:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22228 states, 22227 states have (on average 3.0134970981239033) internal successors, (66981), 22227 states have internal predecessors, (66981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22228 states to 22228 states and 66981 transitions. [2021-06-05 15:46:34,319 INFO L78 Accepts]: Start accepts. Automaton has 22228 states and 66981 transitions. Word has length 54 [2021-06-05 15:46:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:34,319 INFO L482 AbstractCegarLoop]: Abstraction has 22228 states and 66981 transitions. [2021-06-05 15:46:34,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 22228 states and 66981 transitions. [2021-06-05 15:46:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:34,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:34,340 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:34,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:34,540 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash -268714335, now seen corresponding path program 147 times [2021-06-05 15:46:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:34,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901022161] [2021-06-05 15:46:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:34,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:34,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901022161] [2021-06-05 15:46:34,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901022161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:34,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712881678] [2021-06-05 15:46:34,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:34,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:46:34,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 15:46:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:35,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:35,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:35,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:46:35,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:35,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:35,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:35,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 15:46:35,390 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:46:35,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:35,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:35,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:35,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:46:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:35,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712881678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:35,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:35,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 15:46:35,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878438532] [2021-06-05 15:46:35,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:35,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:35,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:35,543 INFO L87 Difference]: Start difference. First operand 22228 states and 66981 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:37,871 INFO L93 Difference]: Finished difference Result 24634 states and 73545 transitions. [2021-06-05 15:46:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:46:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:37,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:37,902 INFO L225 Difference]: With dead ends: 24634 [2021-06-05 15:46:37,902 INFO L226 Difference]: Without dead ends: 24243 [2021-06-05 15:46:37,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1853.2ms TimeCoverageRelationStatistics Valid=356, Invalid=4756, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:46:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24243 states. [2021-06-05 15:46:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24243 to 22054. [2021-06-05 15:46:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22054 states, 22053 states have (on average 3.017730014057044) internal successors, (66550), 22053 states have internal predecessors, (66550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 66550 transitions. [2021-06-05 15:46:38,178 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 66550 transitions. Word has length 54 [2021-06-05 15:46:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:38,178 INFO L482 AbstractCegarLoop]: Abstraction has 22054 states and 66550 transitions. [2021-06-05 15:46:38,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 66550 transitions. [2021-06-05 15:46:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:38,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:38,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:38,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 15:46:38,400 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:38,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1648167537, now seen corresponding path program 148 times [2021-06-05 15:46:38,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:38,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50138168] [2021-06-05 15:46:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:38,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50138168] [2021-06-05 15:46:38,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50138168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:38,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421916057] [2021-06-05 15:46:38,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:38,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:38,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:39,142 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:39,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:46:39,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:39,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:39,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:39,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 15:46:39,216 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:39,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:46:39,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:39,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:39,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:39,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:46:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:39,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421916057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:39,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:39,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:46:39,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368991805] [2021-06-05 15:46:39,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:46:39,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:39,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:46:39,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:39,360 INFO L87 Difference]: Start difference. First operand 22054 states and 66550 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:41,634 INFO L93 Difference]: Finished difference Result 24879 states and 74026 transitions. [2021-06-05 15:46:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:46:41,635 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:41,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:41,664 INFO L225 Difference]: With dead ends: 24879 [2021-06-05 15:46:41,664 INFO L226 Difference]: Without dead ends: 24493 [2021-06-05 15:46:41,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1654.8ms TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:46:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24493 states. [2021-06-05 15:46:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24493 to 22133. [2021-06-05 15:46:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22133 states, 22132 states have (on average 3.015994939454184) internal successors, (66750), 22132 states have internal predecessors, (66750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22133 states to 22133 states and 66750 transitions. [2021-06-05 15:46:41,940 INFO L78 Accepts]: Start accepts. Automaton has 22133 states and 66750 transitions. Word has length 54 [2021-06-05 15:46:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:41,940 INFO L482 AbstractCegarLoop]: Abstraction has 22133 states and 66750 transitions. [2021-06-05 15:46:41,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 22133 states and 66750 transitions. [2021-06-05 15:46:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:41,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:41,961 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:42,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:42,161 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:42,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2121328529, now seen corresponding path program 149 times [2021-06-05 15:46:42,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:42,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78368187] [2021-06-05 15:46:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:42,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:42,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78368187] [2021-06-05 15:46:42,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78368187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:42,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773680420] [2021-06-05 15:46:42,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:42,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:46:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:42,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:46:42,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:42,820 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:42,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:46:42,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:42,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:42,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:42,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:46:42,928 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:42,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:42,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:42,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:42,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:42,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 15:46:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:43,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773680420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:43,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:43,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:46:43,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566402928] [2021-06-05 15:46:43,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:43,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:43,120 INFO L87 Difference]: Start difference. First operand 22133 states and 66750 transitions. Second operand has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:45,500 INFO L93 Difference]: Finished difference Result 24822 states and 73876 transitions. [2021-06-05 15:46:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:46:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:45,531 INFO L225 Difference]: With dead ends: 24822 [2021-06-05 15:46:45,532 INFO L226 Difference]: Without dead ends: 24579 [2021-06-05 15:46:45,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1503.1ms TimeCoverageRelationStatistics Valid=289, Invalid=3743, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:46:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24579 states. [2021-06-05 15:46:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24579 to 22213. [2021-06-05 15:46:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22213 states, 22212 states have (on average 3.0139564199531783) internal successors, (66946), 22212 states have internal predecessors, (66946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22213 states to 22213 states and 66946 transitions. [2021-06-05 15:46:45,808 INFO L78 Accepts]: Start accepts. Automaton has 22213 states and 66946 transitions. Word has length 54 [2021-06-05 15:46:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:45,809 INFO L482 AbstractCegarLoop]: Abstraction has 22213 states and 66946 transitions. [2021-06-05 15:46:45,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 22213 states and 66946 transitions. [2021-06-05 15:46:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:45,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:45,829 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:46,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:46,030 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1453637449, now seen corresponding path program 150 times [2021-06-05 15:46:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:46,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74217833] [2021-06-05 15:46:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:46,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:46,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74217833] [2021-06-05 15:46:46,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74217833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:46,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892737556] [2021-06-05 15:46:46,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:46,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:46:46,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:46,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:46:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:46,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:46,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:46,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 15:46:46,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:46,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:46,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:46,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:30 [2021-06-05 15:46:46,912 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:46,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:46,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:46,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:46,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:46,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:47,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892737556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:47,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:47,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-06-05 15:46:47,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237311177] [2021-06-05 15:46:47,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 15:46:47,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 15:46:47,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:46:47,110 INFO L87 Difference]: Start difference. First operand 22213 states and 66946 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:49,823 INFO L93 Difference]: Finished difference Result 23990 states and 71672 transitions. [2021-06-05 15:46:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:46:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:49,852 INFO L225 Difference]: With dead ends: 23990 [2021-06-05 15:46:49,852 INFO L226 Difference]: Without dead ends: 23576 [2021-06-05 15:46:49,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2172.7ms TimeCoverageRelationStatistics Valid=434, Invalid=5886, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:46:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23576 states. [2021-06-05 15:46:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23576 to 22219. [2021-06-05 15:46:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22219 states, 22218 states have (on average 3.0147177963813125) internal successors, (66981), 22218 states have internal predecessors, (66981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22219 states to 22219 states and 66981 transitions. [2021-06-05 15:46:50,228 INFO L78 Accepts]: Start accepts. Automaton has 22219 states and 66981 transitions. Word has length 54 [2021-06-05 15:46:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:50,228 INFO L482 AbstractCegarLoop]: Abstraction has 22219 states and 66981 transitions. [2021-06-05 15:46:50,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 22219 states and 66981 transitions. [2021-06-05 15:46:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:50,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:50,250 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:50,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:50,465 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1270523895, now seen corresponding path program 151 times [2021-06-05 15:46:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:50,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606878425] [2021-06-05 15:46:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:50,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606878425] [2021-06-05 15:46:50,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606878425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088185906] [2021-06-05 15:46:50,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:51,113 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:51,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:46:51,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:51,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:51,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:51,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 15:46:51,220 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:51,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:51,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:51,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:51,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:51,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088185906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:51,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:51,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:46:51,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179036872] [2021-06-05 15:46:51,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:46:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:46:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:46:51,363 INFO L87 Difference]: Start difference. First operand 22219 states and 66981 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:53,505 INFO L93 Difference]: Finished difference Result 25278 states and 75084 transitions. [2021-06-05 15:46:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:46:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:53,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:53,538 INFO L225 Difference]: With dead ends: 25278 [2021-06-05 15:46:53,538 INFO L226 Difference]: Without dead ends: 24897 [2021-06-05 15:46:53,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1555.9ms TimeCoverageRelationStatistics Valid=281, Invalid=3751, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:46:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24897 states. [2021-06-05 15:46:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24897 to 22203. [2021-06-05 15:46:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22203 states, 22202 states have (on average 3.0149085667957842) internal successors, (66937), 22202 states have internal predecessors, (66937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22203 states to 22203 states and 66937 transitions. [2021-06-05 15:46:53,812 INFO L78 Accepts]: Start accepts. Automaton has 22203 states and 66937 transitions. Word has length 54 [2021-06-05 15:46:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:53,812 INFO L482 AbstractCegarLoop]: Abstraction has 22203 states and 66937 transitions. [2021-06-05 15:46:53,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 22203 states and 66937 transitions. [2021-06-05 15:46:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:53,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:53,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:54,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:54,033 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:54,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1932396853, now seen corresponding path program 152 times [2021-06-05 15:46:54,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:54,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192345479] [2021-06-05 15:46:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:54,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:54,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192345479] [2021-06-05 15:46:54,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192345479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:54,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427500364] [2021-06-05 15:46:54,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:54,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:54,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:54,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:54,692 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:46:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:46:54,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:54,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:54,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:54,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 15:46:54,895 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:54,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:54,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:54,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:54,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:54,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:55,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427500364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:55,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:55,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:46:55,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152384739] [2021-06-05 15:46:55,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:55,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:55,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:55,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:55,036 INFO L87 Difference]: Start difference. First operand 22203 states and 66937 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:57,410 INFO L93 Difference]: Finished difference Result 25251 states and 75012 transitions. [2021-06-05 15:46:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:46:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:57,444 INFO L225 Difference]: With dead ends: 25251 [2021-06-05 15:46:57,444 INFO L226 Difference]: Without dead ends: 24913 [2021-06-05 15:46:57,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1609.6ms TimeCoverageRelationStatistics Valid=304, Invalid=3986, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:46:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24913 states. [2021-06-05 15:46:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24913 to 22215. [2021-06-05 15:46:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22215 states, 22214 states have (on average 3.014765463221392) internal successors, (66970), 22214 states have internal predecessors, (66970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22215 states to 22215 states and 66970 transitions. [2021-06-05 15:46:57,720 INFO L78 Accepts]: Start accepts. Automaton has 22215 states and 66970 transitions. Word has length 54 [2021-06-05 15:46:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:57,720 INFO L482 AbstractCegarLoop]: Abstraction has 22215 states and 66970 transitions. [2021-06-05 15:46:57,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 22215 states and 66970 transitions. [2021-06-05 15:46:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:57,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:57,741 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:57,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:57,941 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1029281981, now seen corresponding path program 153 times [2021-06-05 15:46:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:57,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730325038] [2021-06-05 15:46:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:58,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:58,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730325038] [2021-06-05 15:46:58,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730325038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:58,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289797798] [2021-06-05 15:46:58,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:58,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:46:58,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:46:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:58,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:58,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:46:58,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:58,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:58,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:58,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 15:46:58,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:46:58,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:46:58,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:58,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:58,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:58,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:46:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:58,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289797798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:58,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:58,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 15:46:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946239038] [2021-06-05 15:46:58,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:46:58,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:58,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:46:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:46:58,951 INFO L87 Difference]: Start difference. First operand 22215 states and 66970 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:02,023 INFO L93 Difference]: Finished difference Result 23993 states and 71691 transitions. [2021-06-05 15:47:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:47:02,024 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:02,052 INFO L225 Difference]: With dead ends: 23993 [2021-06-05 15:47:02,052 INFO L226 Difference]: Without dead ends: 23628 [2021-06-05 15:47:02,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2222.8ms TimeCoverageRelationStatistics Valid=423, Invalid=5739, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:47:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23628 states. [2021-06-05 15:47:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23628 to 22227. [2021-06-05 15:47:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22227 states, 22226 states have (on average 3.0142625753621886) internal successors, (66995), 22226 states have internal predecessors, (66995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22227 states to 22227 states and 66995 transitions. [2021-06-05 15:47:02,315 INFO L78 Accepts]: Start accepts. Automaton has 22227 states and 66995 transitions. Word has length 54 [2021-06-05 15:47:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:02,315 INFO L482 AbstractCegarLoop]: Abstraction has 22227 states and 66995 transitions. [2021-06-05 15:47:02,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22227 states and 66995 transitions. [2021-06-05 15:47:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:02,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:02,335 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:02,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:02,543 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1189910193, now seen corresponding path program 154 times [2021-06-05 15:47:02,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:02,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589476866] [2021-06-05 15:47:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:02,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:02,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589476866] [2021-06-05 15:47:02,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589476866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:02,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202543394] [2021-06-05 15:47:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:02,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:47:02,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:47:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:03,130 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:47:03,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:03,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:03,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:03,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:25 [2021-06-05 15:47:03,263 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:03,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:03,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:03,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:03,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:03,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:47:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:03,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202543394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:03,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:03,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:47:03,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109357251] [2021-06-05 15:47:03,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:47:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:47:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:47:03,409 INFO L87 Difference]: Start difference. First operand 22227 states and 66995 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:05,729 INFO L93 Difference]: Finished difference Result 24960 states and 74221 transitions. [2021-06-05 15:47:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:47:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:05,763 INFO L225 Difference]: With dead ends: 24960 [2021-06-05 15:47:05,763 INFO L226 Difference]: Without dead ends: 24599 [2021-06-05 15:47:05,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1627.2ms TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:47:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24599 states. [2021-06-05 15:47:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24599 to 22155. [2021-06-05 15:47:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 22154 states have (on average 3.0162047485781347) internal successors, (66821), 22154 states have internal predecessors, (66821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 66821 transitions. [2021-06-05 15:47:06,174 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 66821 transitions. Word has length 54 [2021-06-05 15:47:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:06,174 INFO L482 AbstractCegarLoop]: Abstraction has 22155 states and 66821 transitions. [2021-06-05 15:47:06,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 66821 transitions. [2021-06-05 15:47:06,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:06,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:06,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:06,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 15:47:06,396 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:06,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1389100985, now seen corresponding path program 155 times [2021-06-05 15:47:06,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:06,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193780462] [2021-06-05 15:47:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:06,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:06,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193780462] [2021-06-05 15:47:06,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193780462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:06,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925864132] [2021-06-05 15:47:06,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:06,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:47:06,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:47:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:07,234 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:07,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:47:07,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:07,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:07,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:07,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:47:07,309 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:07,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:07,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:07,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:07,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:07,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 15:47:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:07,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925864132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:07,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:07,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 41 [2021-06-05 15:47:07,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488383451] [2021-06-05 15:47:07,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:47:07,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:47:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1594, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:47:07,517 INFO L87 Difference]: Start difference. First operand 22155 states and 66821 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:10,296 INFO L93 Difference]: Finished difference Result 26034 states and 77414 transitions. [2021-06-05 15:47:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:47:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:10,331 INFO L225 Difference]: With dead ends: 26034 [2021-06-05 15:47:10,331 INFO L226 Difference]: Without dead ends: 25791 [2021-06-05 15:47:10,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1732.4ms TimeCoverageRelationStatistics Valid=331, Invalid=4225, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:47:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25791 states. [2021-06-05 15:47:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25791 to 22355. [2021-06-05 15:47:10,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22355 states, 22354 states have (on average 3.0127046613581463) internal successors, (67346), 22354 states have internal predecessors, (67346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22355 states to 22355 states and 67346 transitions. [2021-06-05 15:47:10,616 INFO L78 Accepts]: Start accepts. Automaton has 22355 states and 67346 transitions. Word has length 54 [2021-06-05 15:47:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:10,616 INFO L482 AbstractCegarLoop]: Abstraction has 22355 states and 67346 transitions. [2021-06-05 15:47:10,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 22355 states and 67346 transitions. [2021-06-05 15:47:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:10,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:10,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:10,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 15:47:10,837 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash 669099667, now seen corresponding path program 156 times [2021-06-05 15:47:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:10,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601065937] [2021-06-05 15:47:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:11,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:11,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601065937] [2021-06-05 15:47:11,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601065937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:11,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393187267] [2021-06-05 15:47:11,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:11,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:47:11,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:47:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:11,602 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 15:47:11,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:11,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:47:11,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:11,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:11,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:11,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 15:47:11,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:47:11,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:11,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 15:47:11,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:11,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:11,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:11,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 15:47:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:11,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393187267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:11,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:11,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:47:11,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369875376] [2021-06-05 15:47:11,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:47:11,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:47:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:47:11,929 INFO L87 Difference]: Start difference. First operand 22355 states and 67346 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:14,458 INFO L93 Difference]: Finished difference Result 25904 states and 77087 transitions. [2021-06-05 15:47:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:47:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:14,493 INFO L225 Difference]: With dead ends: 25904 [2021-06-05 15:47:14,493 INFO L226 Difference]: Without dead ends: 25731 [2021-06-05 15:47:14,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1857.3ms TimeCoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:47:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25731 states. [2021-06-05 15:47:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25731 to 22348. [2021-06-05 15:47:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22348 states, 22347 states have (on average 3.012663892245044) internal successors, (67324), 22347 states have internal predecessors, (67324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22348 states to 22348 states and 67324 transitions. [2021-06-05 15:47:14,778 INFO L78 Accepts]: Start accepts. Automaton has 22348 states and 67324 transitions. Word has length 54 [2021-06-05 15:47:14,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:14,778 INFO L482 AbstractCegarLoop]: Abstraction has 22348 states and 67324 transitions. [2021-06-05 15:47:14,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 22348 states and 67324 transitions. [2021-06-05 15:47:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:14,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:14,799 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:15,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 15:47:15,001 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1807624031, now seen corresponding path program 157 times [2021-06-05 15:47:15,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:15,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968209364] [2021-06-05 15:47:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:15,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:15,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968209364] [2021-06-05 15:47:15,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968209364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:15,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974203377] [2021-06-05 15:47:15,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:47:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:15,792 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:15,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:47:15,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:15,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:15,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:15,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 15:47:15,873 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:15,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:47:15,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:15,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:15,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:15,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:47:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:16,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974203377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:16,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:16,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:47:16,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199695878] [2021-06-05 15:47:16,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:47:16,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:47:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:47:16,017 INFO L87 Difference]: Start difference. First operand 22348 states and 67324 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:18,395 INFO L93 Difference]: Finished difference Result 25989 states and 77296 transitions. [2021-06-05 15:47:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:47:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:18,432 INFO L225 Difference]: With dead ends: 25989 [2021-06-05 15:47:18,432 INFO L226 Difference]: Without dead ends: 25679 [2021-06-05 15:47:18,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1740.5ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:47:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25679 states. [2021-06-05 15:47:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25679 to 22231. [2021-06-05 15:47:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22231 states, 22230 states have (on average 3.015249662618084) internal successors, (67029), 22230 states have internal predecessors, (67029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22231 states to 22231 states and 67029 transitions. [2021-06-05 15:47:18,733 INFO L78 Accepts]: Start accepts. Automaton has 22231 states and 67029 transitions. Word has length 54 [2021-06-05 15:47:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:18,733 INFO L482 AbstractCegarLoop]: Abstraction has 22231 states and 67029 transitions. [2021-06-05 15:47:18,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 22231 states and 67029 transitions. [2021-06-05 15:47:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:18,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:18,755 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:18,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:18,955 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 915939993, now seen corresponding path program 158 times [2021-06-05 15:47:18,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:18,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357825501] [2021-06-05 15:47:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:19,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:19,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357825501] [2021-06-05 15:47:19,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357825501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:19,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177710435] [2021-06-05 15:47:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:19,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:47:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:47:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:19,629 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:19,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:47:19,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:19,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:19,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:19,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 15:47:19,759 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:19,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:19,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:19,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:19,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:19,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:47:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:19,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177710435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:19,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:19,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:47:19,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590725478] [2021-06-05 15:47:19,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:47:19,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:19,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:47:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:47:19,905 INFO L87 Difference]: Start difference. First operand 22231 states and 67029 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:22,520 INFO L93 Difference]: Finished difference Result 26270 states and 78044 transitions. [2021-06-05 15:47:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:47:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:22,556 INFO L225 Difference]: With dead ends: 26270 [2021-06-05 15:47:22,556 INFO L226 Difference]: Without dead ends: 25932 [2021-06-05 15:47:22,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1654.4ms TimeCoverageRelationStatistics Valid=288, Invalid=3744, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:47:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-06-05 15:47:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 22235. [2021-06-05 15:47:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0150220383196906) internal successors, (67036), 22234 states have internal predecessors, (67036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67036 transitions. [2021-06-05 15:47:22,896 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67036 transitions. Word has length 54 [2021-06-05 15:47:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:22,896 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67036 transitions. [2021-06-05 15:47:22,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67036 transitions. [2021-06-05 15:47:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:22,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:22,917 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:23,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:23,117 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 12825121, now seen corresponding path program 159 times [2021-06-05 15:47:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:23,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573102224] [2021-06-05 15:47:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:23,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573102224] [2021-06-05 15:47:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573102224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386250390] [2021-06-05 15:47:23,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:23,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:47:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:23,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:47:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:23,776 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:23,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:47:23,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:23,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:23,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:23,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:47:23,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:23,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:23,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:23,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:23,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:23,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:47:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:24,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386250390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:24,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:24,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:47:24,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273742139] [2021-06-05 15:47:24,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:47:24,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:24,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:47:24,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:47:24,034 INFO L87 Difference]: Start difference. First operand 22235 states and 67036 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:26,749 INFO L93 Difference]: Finished difference Result 26381 states and 78335 transitions. [2021-06-05 15:47:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:47:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:26,784 INFO L225 Difference]: With dead ends: 26381 [2021-06-05 15:47:26,784 INFO L226 Difference]: Without dead ends: 26000 [2021-06-05 15:47:26,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1686.5ms TimeCoverageRelationStatistics Valid=289, Invalid=3871, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:47:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26000 states. [2021-06-05 15:47:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26000 to 22215. [2021-06-05 15:47:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22215 states, 22214 states have (on average 3.0154407130638337) internal successors, (66985), 22214 states have internal predecessors, (66985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22215 states to 22215 states and 66985 transitions. [2021-06-05 15:47:27,066 INFO L78 Accepts]: Start accepts. Automaton has 22215 states and 66985 transitions. Word has length 54 [2021-06-05 15:47:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:27,067 INFO L482 AbstractCegarLoop]: Abstraction has 22215 states and 66985 transitions. [2021-06-05 15:47:27,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22215 states and 66985 transitions. [2021-06-05 15:47:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:27,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:27,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:27,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 15:47:27,288 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:27,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1190246013, now seen corresponding path program 160 times [2021-06-05 15:47:27,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:27,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424055859] [2021-06-05 15:47:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:27,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:27,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424055859] [2021-06-05 15:47:27,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424055859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:27,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631474225] [2021-06-05 15:47:27,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:27,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:47:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:27,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:47:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:28,013 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:28,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:47:28,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:28,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:28,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:28,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-06-05 15:47:28,152 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:28,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:47:28,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:28,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:28,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:28,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:47:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:28,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631474225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:28,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:28,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:47:28,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296408520] [2021-06-05 15:47:28,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:47:28,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:28,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:47:28,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:47:28,296 INFO L87 Difference]: Start difference. First operand 22215 states and 66985 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:30,628 INFO L93 Difference]: Finished difference Result 26271 states and 78046 transitions. [2021-06-05 15:47:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:47:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:30,662 INFO L225 Difference]: With dead ends: 26271 [2021-06-05 15:47:30,663 INFO L226 Difference]: Without dead ends: 25933 [2021-06-05 15:47:30,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1734.6ms TimeCoverageRelationStatistics Valid=299, Invalid=3861, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:47:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25933 states. [2021-06-05 15:47:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25933 to 22231. [2021-06-05 15:47:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22231 states, 22230 states have (on average 3.0150697255960415) internal successors, (67025), 22230 states have internal predecessors, (67025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22231 states to 22231 states and 67025 transitions. [2021-06-05 15:47:30,943 INFO L78 Accepts]: Start accepts. Automaton has 22231 states and 67025 transitions. Word has length 54 [2021-06-05 15:47:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:30,943 INFO L482 AbstractCegarLoop]: Abstraction has 22231 states and 67025 transitions. [2021-06-05 15:47:30,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 22231 states and 67025 transitions. [2021-06-05 15:47:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:30,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:30,964 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:31,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:31,165 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2093360885, now seen corresponding path program 161 times [2021-06-05 15:47:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:31,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284056202] [2021-06-05 15:47:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:31,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:31,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284056202] [2021-06-05 15:47:31,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284056202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:31,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527306766] [2021-06-05 15:47:31,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:31,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:47:31,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:31,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:47:31,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:31,773 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:31,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:47:31,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:31,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:31,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:31,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:47:31,912 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:31,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:31,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:31,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:31,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:31,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 15:47:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:32,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527306766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:32,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:32,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:47:32,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414268466] [2021-06-05 15:47:32,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:47:32,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:47:32,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:47:32,108 INFO L87 Difference]: Start difference. First operand 22231 states and 67025 transitions. Second operand has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:34,637 INFO L93 Difference]: Finished difference Result 26033 states and 77415 transitions. [2021-06-05 15:47:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:47:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:34,671 INFO L225 Difference]: With dead ends: 26033 [2021-06-05 15:47:34,671 INFO L226 Difference]: Without dead ends: 25790 [2021-06-05 15:47:34,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1605.4ms TimeCoverageRelationStatistics Valid=308, Invalid=3982, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:47:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25790 states. [2021-06-05 15:47:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25790 to 22311. [2021-06-05 15:47:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22311 states, 22310 states have (on average 3.01317794710892) internal successors, (67224), 22310 states have internal predecessors, (67224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22311 states to 22311 states and 67224 transitions. [2021-06-05 15:47:34,956 INFO L78 Accepts]: Start accepts. Automaton has 22311 states and 67224 transitions. Word has length 54 [2021-06-05 15:47:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:34,957 INFO L482 AbstractCegarLoop]: Abstraction has 22311 states and 67224 transitions. [2021-06-05 15:47:34,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 22311 states and 67224 transitions. [2021-06-05 15:47:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:34,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:34,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:35,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:35,178 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:35,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1481605093, now seen corresponding path program 162 times [2021-06-05 15:47:35,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:35,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141328357] [2021-06-05 15:47:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:35,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:35,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141328357] [2021-06-05 15:47:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141328357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:35,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393120643] [2021-06-05 15:47:35,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:35,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:47:35,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:47:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:35,796 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:35,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:47:35,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:35,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:35,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:35,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:47:35,933 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:35,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:35,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:35,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:35,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:35,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:47:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:36,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393120643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:36,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:36,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:47:36,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467377210] [2021-06-05 15:47:36,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:47:36,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:36,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:47:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:47:36,132 INFO L87 Difference]: Start difference. First operand 22311 states and 67224 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:38,594 INFO L93 Difference]: Finished difference Result 26303 states and 78125 transitions. [2021-06-05 15:47:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:47:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:38,628 INFO L225 Difference]: With dead ends: 26303 [2021-06-05 15:47:38,628 INFO L226 Difference]: Without dead ends: 25986 [2021-06-05 15:47:38,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1750.4ms TimeCoverageRelationStatistics Valid=327, Invalid=4365, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:47:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25986 states. [2021-06-05 15:47:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25986 to 22227. [2021-06-05 15:47:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22227 states, 22226 states have (on average 3.0151174300368937) internal successors, (67014), 22226 states have internal predecessors, (67014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22227 states to 22227 states and 67014 transitions. [2021-06-05 15:47:38,915 INFO L78 Accepts]: Start accepts. Automaton has 22227 states and 67014 transitions. Word has length 54 [2021-06-05 15:47:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:38,915 INFO L482 AbstractCegarLoop]: Abstraction has 22227 states and 67014 transitions. [2021-06-05 15:47:38,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 22227 states and 67014 transitions. [2021-06-05 15:47:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:38,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:38,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:39,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:39,136 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash -17585763, now seen corresponding path program 163 times [2021-06-05 15:47:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:39,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733650873] [2021-06-05 15:47:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:39,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733650873] [2021-06-05 15:47:39,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733650873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775545029] [2021-06-05 15:47:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:47:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:39,731 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:39,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:47:39,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:39,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:39,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:39,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:25 [2021-06-05 15:47:39,868 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:47:39,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:39,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:39,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:39,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 15:47:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:40,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775545029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:40,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:40,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:47:40,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269555043] [2021-06-05 15:47:40,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:47:40,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:47:40,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:47:40,015 INFO L87 Difference]: Start difference. First operand 22227 states and 67014 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:42,721 INFO L93 Difference]: Finished difference Result 26023 states and 77366 transitions. [2021-06-05 15:47:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:47:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:42,754 INFO L225 Difference]: With dead ends: 26023 [2021-06-05 15:47:42,754 INFO L226 Difference]: Without dead ends: 25662 [2021-06-05 15:47:42,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1700.1ms TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:47:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-06-05 15:47:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 22167. [2021-06-05 15:47:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22167 states, 22166 states have (on average 3.0167373454840747) internal successors, (66869), 22166 states have internal predecessors, (66869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22167 states to 22167 states and 66869 transitions. [2021-06-05 15:47:43,135 INFO L78 Accepts]: Start accepts. Automaton has 22167 states and 66869 transitions. Word has length 54 [2021-06-05 15:47:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:43,135 INFO L482 AbstractCegarLoop]: Abstraction has 22167 states and 66869 transitions. [2021-06-05 15:47:43,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 22167 states and 66869 transitions. [2021-06-05 15:47:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:43,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:43,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:43,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:43,355 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash 911094525, now seen corresponding path program 164 times [2021-06-05 15:47:43,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:43,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709222237] [2021-06-05 15:47:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:43,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709222237] [2021-06-05 15:47:43,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709222237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425260009] [2021-06-05 15:47:43,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:43,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:47:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:47:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:44,116 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:44,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:47:44,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:44,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:44,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:44,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 15:47:44,190 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:44,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:44,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:44,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:44,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:44,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:47:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425260009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:44,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:44,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:47:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079354025] [2021-06-05 15:47:44,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:47:44,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:47:44,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:47:44,335 INFO L87 Difference]: Start difference. First operand 22167 states and 66869 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:46,755 INFO L93 Difference]: Finished difference Result 25907 states and 77083 transitions. [2021-06-05 15:47:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:47:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:46,789 INFO L225 Difference]: With dead ends: 25907 [2021-06-05 15:47:46,789 INFO L226 Difference]: Without dead ends: 25521 [2021-06-05 15:47:46,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1719.0ms TimeCoverageRelationStatistics Valid=300, Invalid=3860, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:47:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2021-06-05 15:47:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 22187. [2021-06-05 15:47:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22187 states, 22186 states have (on average 3.016001081763274) internal successors, (66913), 22186 states have internal predecessors, (66913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22187 states to 22187 states and 66913 transitions. [2021-06-05 15:47:47,074 INFO L78 Accepts]: Start accepts. Automaton has 22187 states and 66913 transitions. Word has length 54 [2021-06-05 15:47:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:47,074 INFO L482 AbstractCegarLoop]: Abstraction has 22187 states and 66913 transitions. [2021-06-05 15:47:47,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 22187 states and 66913 transitions. [2021-06-05 15:47:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:47,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:47,094 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:47,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 15:47:47,295 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:47,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:47,295 INFO L82 PathProgramCache]: Analyzing trace with hash 437933533, now seen corresponding path program 165 times [2021-06-05 15:47:47,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:47,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844259609] [2021-06-05 15:47:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:47,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:47,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844259609] [2021-06-05 15:47:47,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844259609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:47,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366879726] [2021-06-05 15:47:47,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:47,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:47:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:47:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:47,978 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:47,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:47:47,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:47,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:47,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:47,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:47:48,180 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 15:47:48,186 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:48,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:48,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:48,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:48,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:47:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:48,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366879726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:48,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:48,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:47:48,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778006573] [2021-06-05 15:47:48,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:47:48,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:47:48,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:47:48,330 INFO L87 Difference]: Start difference. First operand 22187 states and 66913 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:50,696 INFO L93 Difference]: Finished difference Result 26115 states and 77631 transitions. [2021-06-05 15:47:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:47:50,696 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:50,730 INFO L225 Difference]: With dead ends: 26115 [2021-06-05 15:47:50,730 INFO L226 Difference]: Without dead ends: 25777 [2021-06-05 15:47:50,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1736.5ms TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:47:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25777 states. [2021-06-05 15:47:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25777 to 22191. [2021-06-05 15:47:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22191 states, 22190 states have (on average 3.0157728706624605) internal successors, (66920), 22190 states have internal predecessors, (66920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22191 states to 22191 states and 66920 transitions. [2021-06-05 15:47:51,015 INFO L78 Accepts]: Start accepts. Automaton has 22191 states and 66920 transitions. Word has length 54 [2021-06-05 15:47:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:51,015 INFO L482 AbstractCegarLoop]: Abstraction has 22191 states and 66920 transitions. [2021-06-05 15:47:51,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 22191 states and 66920 transitions. [2021-06-05 15:47:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:51,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:51,036 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:51,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 15:47:51,237 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash -465181339, now seen corresponding path program 166 times [2021-06-05 15:47:51,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:51,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902281206] [2021-06-05 15:47:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:51,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902281206] [2021-06-05 15:47:51,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902281206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:51,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247998667] [2021-06-05 15:47:51,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:51,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:47:51,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:51,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:47:51,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:51,900 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:47:51,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:47:51,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:51,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:51,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:51,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-06-05 15:47:52,009 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:52,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:47:52,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:52,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:52,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:52,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:47:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:52,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247998667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:52,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:52,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:47:52,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37566039] [2021-06-05 15:47:52,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:47:52,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:47:52,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:47:52,154 INFO L87 Difference]: Start difference. First operand 22191 states and 66920 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:54,911 INFO L93 Difference]: Finished difference Result 26198 states and 77847 transitions. [2021-06-05 15:47:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:47:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:54,945 INFO L225 Difference]: With dead ends: 26198 [2021-06-05 15:47:54,945 INFO L226 Difference]: Without dead ends: 25817 [2021-06-05 15:47:54,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1670.4ms TimeCoverageRelationStatistics Valid=291, Invalid=3869, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:47:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25817 states. [2021-06-05 15:47:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25817 to 22171. [2021-06-05 15:47:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22171 states, 22170 states have (on average 3.0167343256653134) internal successors, (66881), 22170 states have internal predecessors, (66881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22171 states to 22171 states and 66881 transitions. [2021-06-05 15:47:55,237 INFO L78 Accepts]: Start accepts. Automaton has 22171 states and 66881 transitions. Word has length 54 [2021-06-05 15:47:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:55,237 INFO L482 AbstractCegarLoop]: Abstraction has 22171 states and 66881 transitions. [2021-06-05 15:47:55,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 22171 states and 66881 transitions. [2021-06-05 15:47:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:55,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:55,258 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:55,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 15:47:55,458 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:55,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1574106727, now seen corresponding path program 167 times [2021-06-05 15:47:55,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:55,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772857424] [2021-06-05 15:47:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:55,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:55,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772857424] [2021-06-05 15:47:55,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772857424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014166741] [2021-06-05 15:47:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:55,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:47:55,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:47:55,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:56,343 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:47:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:47:56,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:56,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:56,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:56,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:47:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:47:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:56,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:56,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:47:56,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:47:56,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:56,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:56,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:47:56,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 15:47:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:56,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014166741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:56,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:56,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 44 [2021-06-05 15:47:56,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103895909] [2021-06-05 15:47:56,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:47:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:47:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:47:56,669 INFO L87 Difference]: Start difference. First operand 22171 states and 66881 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:59,902 INFO L93 Difference]: Finished difference Result 26673 states and 79409 transitions. [2021-06-05 15:47:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:47:59,903 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:59,939 INFO L225 Difference]: With dead ends: 26673 [2021-06-05 15:47:59,939 INFO L226 Difference]: Without dead ends: 26452 [2021-06-05 15:47:59,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 2400.1ms TimeCoverageRelationStatistics Valid=399, Invalid=5763, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:47:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26452 states. [2021-06-05 15:48:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26452 to 22300. [2021-06-05 15:48:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22300 states, 22299 states have (on average 3.0137674335171982) internal successors, (67204), 22299 states have internal predecessors, (67204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22300 states to 22300 states and 67204 transitions. [2021-06-05 15:48:00,226 INFO L78 Accepts]: Start accepts. Automaton has 22300 states and 67204 transitions. Word has length 54 [2021-06-05 15:48:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:00,226 INFO L482 AbstractCegarLoop]: Abstraction has 22300 states and 67204 transitions. [2021-06-05 15:48:00,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 22300 states and 67204 transitions. [2021-06-05 15:48:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:00,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:00,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:00,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:00,446 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1155583681, now seen corresponding path program 168 times [2021-06-05 15:48:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174322562] [2021-06-05 15:48:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:00,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:00,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174322562] [2021-06-05 15:48:00,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174322562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:00,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545129415] [2021-06-05 15:48:00,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:00,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:48:00,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:48:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:01,196 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:01,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:01,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:01,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:01,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:01,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:48:01,279 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:01,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:48:01,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:01,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:01,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:01,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 15:48:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:01,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545129415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:01,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:01,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:48:01,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914340822] [2021-06-05 15:48:01,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:48:01,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:48:01,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:48:01,415 INFO L87 Difference]: Start difference. First operand 22300 states and 67204 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:04,067 INFO L93 Difference]: Finished difference Result 26696 states and 79459 transitions. [2021-06-05 15:48:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:48:04,068 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:04,099 INFO L225 Difference]: With dead ends: 26696 [2021-06-05 15:48:04,099 INFO L226 Difference]: Without dead ends: 26386 [2021-06-05 15:48:04,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1689.6ms TimeCoverageRelationStatistics Valid=294, Invalid=3738, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:48:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26386 states. [2021-06-05 15:48:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26386 to 22183. [2021-06-05 15:48:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22183 states, 22182 states have (on average 3.016544946352899) internal successors, (66913), 22182 states have internal predecessors, (66913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22183 states to 22183 states and 66913 transitions. [2021-06-05 15:48:04,372 INFO L78 Accepts]: Start accepts. Automaton has 22183 states and 66913 transitions. Word has length 54 [2021-06-05 15:48:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:04,372 INFO L482 AbstractCegarLoop]: Abstraction has 22183 states and 66913 transitions. [2021-06-05 15:48:04,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 22183 states and 66913 transitions. [2021-06-05 15:48:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:04,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:04,392 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:04,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 15:48:04,593 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1674370965, now seen corresponding path program 169 times [2021-06-05 15:48:04,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:04,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37943428] [2021-06-05 15:48:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:05,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37943428] [2021-06-05 15:48:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37943428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003074808] [2021-06-05 15:48:05,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:05,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:05,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:05,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:05,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:05,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:05,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 15:48:05,415 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:48:05,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:05,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:05,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:05,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:48:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:05,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003074808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:05,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:05,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:48:05,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345866729] [2021-06-05 15:48:05,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:48:05,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:05,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:48:05,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:48:05,563 INFO L87 Difference]: Start difference. First operand 22183 states and 66913 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:08,892 INFO L93 Difference]: Finished difference Result 27393 states and 81302 transitions. [2021-06-05 15:48:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 15:48:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:08,929 INFO L225 Difference]: With dead ends: 27393 [2021-06-05 15:48:08,929 INFO L226 Difference]: Without dead ends: 26835 [2021-06-05 15:48:08,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2284.2ms TimeCoverageRelationStatistics Valid=447, Invalid=6195, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:48:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26835 states. [2021-06-05 15:48:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26835 to 22290. [2021-06-05 15:48:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22290 states, 22289 states have (on average 3.014536318363318) internal successors, (67191), 22289 states have internal predecessors, (67191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22290 states to 22290 states and 67191 transitions. [2021-06-05 15:48:09,308 INFO L78 Accepts]: Start accepts. Automaton has 22290 states and 67191 transitions. Word has length 54 [2021-06-05 15:48:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:09,308 INFO L482 AbstractCegarLoop]: Abstraction has 22290 states and 67191 transitions. [2021-06-05 15:48:09,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 22290 states and 67191 transitions. [2021-06-05 15:48:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:09,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:09,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:09,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:09,530 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:09,530 INFO L82 PathProgramCache]: Analyzing trace with hash -605020415, now seen corresponding path program 170 times [2021-06-05 15:48:09,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:09,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729204982] [2021-06-05 15:48:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:09,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:09,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729204982] [2021-06-05 15:48:09,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729204982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:09,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137094950] [2021-06-05 15:48:09,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:09,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:48:09,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:09,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:10,234 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:48:10,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:48:10,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:10,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:10,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:10,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 15:48:10,339 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:48:10,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:10,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:10,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:10,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:48:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137094950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:10,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:10,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:48:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65817184] [2021-06-05 15:48:10,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:48:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:48:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:48:10,488 INFO L87 Difference]: Start difference. First operand 22290 states and 67191 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:14,373 INFO L93 Difference]: Finished difference Result 27933 states and 82783 transitions. [2021-06-05 15:48:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:48:14,373 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:14,410 INFO L225 Difference]: With dead ends: 27933 [2021-06-05 15:48:14,410 INFO L226 Difference]: Without dead ends: 27399 [2021-06-05 15:48:14,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 2548.0ms TimeCoverageRelationStatistics Valid=512, Invalid=7320, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:48:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27399 states. [2021-06-05 15:48:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27399 to 22344. [2021-06-05 15:48:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22344 states, 22343 states have (on average 3.014948753524594) internal successors, (67363), 22343 states have internal predecessors, (67363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22344 states to 22344 states and 67363 transitions. [2021-06-05 15:48:14,782 INFO L78 Accepts]: Start accepts. Automaton has 22344 states and 67363 transitions. Word has length 54 [2021-06-05 15:48:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:14,782 INFO L482 AbstractCegarLoop]: Abstraction has 22344 states and 67363 transitions. [2021-06-05 15:48:14,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:14,783 INFO L276 IsEmpty]: Start isEmpty. Operand 22344 states and 67363 transitions. [2021-06-05 15:48:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:14,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:14,804 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:15,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 15:48:15,004 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:15,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:15,005 INFO L82 PathProgramCache]: Analyzing trace with hash 884895549, now seen corresponding path program 171 times [2021-06-05 15:48:15,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:15,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832407379] [2021-06-05 15:48:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:15,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:15,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832407379] [2021-06-05 15:48:15,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832407379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:15,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537278628] [2021-06-05 15:48:15,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:15,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:48:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:48:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:15,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:15,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:15,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:15,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:15,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:15,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:48:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:15,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:48:15,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 15:48:15,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:15,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:15,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:15,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 15:48:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:16,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537278628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:16,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:16,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 15:48:16,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894350871] [2021-06-05 15:48:16,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:48:16,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:16,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:48:16,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:48:16,051 INFO L87 Difference]: Start difference. First operand 22344 states and 67363 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:20,288 INFO L93 Difference]: Finished difference Result 28464 states and 84507 transitions. [2021-06-05 15:48:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:48:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:20,324 INFO L225 Difference]: With dead ends: 28464 [2021-06-05 15:48:20,324 INFO L226 Difference]: Without dead ends: 28243 [2021-06-05 15:48:20,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 2753.9ms TimeCoverageRelationStatistics Valid=567, Invalid=7805, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:48:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28243 states. [2021-06-05 15:48:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28243 to 22394. [2021-06-05 15:48:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22394 states, 22393 states have (on average 3.0132184164694324) internal successors, (67475), 22393 states have internal predecessors, (67475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22394 states to 22394 states and 67475 transitions. [2021-06-05 15:48:20,621 INFO L78 Accepts]: Start accepts. Automaton has 22394 states and 67475 transitions. Word has length 54 [2021-06-05 15:48:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:20,621 INFO L482 AbstractCegarLoop]: Abstraction has 22394 states and 67475 transitions. [2021-06-05 15:48:20,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 22394 states and 67475 transitions. [2021-06-05 15:48:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:20,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:20,642 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:20,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 15:48:20,842 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:20,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1815971551, now seen corresponding path program 172 times [2021-06-05 15:48:20,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:20,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576889011] [2021-06-05 15:48:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:21,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576889011] [2021-06-05 15:48:21,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576889011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218942785] [2021-06-05 15:48:21,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:21,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:48:21,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:21,541 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:21,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:21,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:21,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:21,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:21,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 15:48:21,614 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:48:21,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:21,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:21,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:21,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:48:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:21,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218942785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:21,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:21,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:48:21,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619859654] [2021-06-05 15:48:21,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:48:21,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:48:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:48:21,790 INFO L87 Difference]: Start difference. First operand 22394 states and 67475 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:26,449 INFO L93 Difference]: Finished difference Result 29650 states and 87702 transitions. [2021-06-05 15:48:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:48:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:26,488 INFO L225 Difference]: With dead ends: 29650 [2021-06-05 15:48:26,488 INFO L226 Difference]: Without dead ends: 29214 [2021-06-05 15:48:26,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2804.8ms TimeCoverageRelationStatistics Valid=623, Invalid=8689, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 15:48:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-06-05 15:48:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 22365. [2021-06-05 15:48:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22365 states, 22364 states have (on average 3.013593274906099) internal successors, (67396), 22364 states have internal predecessors, (67396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22365 states to 22365 states and 67396 transitions. [2021-06-05 15:48:26,792 INFO L78 Accepts]: Start accepts. Automaton has 22365 states and 67396 transitions. Word has length 54 [2021-06-05 15:48:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:26,792 INFO L482 AbstractCegarLoop]: Abstraction has 22365 states and 67396 transitions. [2021-06-05 15:48:26,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 22365 states and 67396 transitions. [2021-06-05 15:48:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:26,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:26,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:27,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 15:48:27,015 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash 5983179, now seen corresponding path program 173 times [2021-06-05 15:48:27,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:27,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832019018] [2021-06-05 15:48:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:27,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:27,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832019018] [2021-06-05 15:48:27,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832019018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:27,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5885747] [2021-06-05 15:48:27,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:27,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:48:27,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 15:48:27,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:27,729 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:27,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:27,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:27,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:27,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:27,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:48:27,868 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:27,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:48:27,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:27,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:27,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:27,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 15:48:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5885747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:28,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:28,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:48:28,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730575010] [2021-06-05 15:48:28,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:48:28,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:48:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:48:28,010 INFO L87 Difference]: Start difference. First operand 22365 states and 67396 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:31,968 INFO L93 Difference]: Finished difference Result 27191 states and 80450 transitions. [2021-06-05 15:48:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 15:48:31,969 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:31,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:32,003 INFO L225 Difference]: With dead ends: 27191 [2021-06-05 15:48:32,003 INFO L226 Difference]: Without dead ends: 26667 [2021-06-05 15:48:32,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 2579.1ms TimeCoverageRelationStatistics Valid=615, Invalid=8127, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:48:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26667 states. [2021-06-05 15:48:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26667 to 22522. [2021-06-05 15:48:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22522 states, 22521 states have (on average 3.013010079481373) internal successors, (67856), 22521 states have internal predecessors, (67856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22522 states to 22522 states and 67856 transitions. [2021-06-05 15:48:32,293 INFO L78 Accepts]: Start accepts. Automaton has 22522 states and 67856 transitions. Word has length 54 [2021-06-05 15:48:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:32,293 INFO L482 AbstractCegarLoop]: Abstraction has 22522 states and 67856 transitions. [2021-06-05 15:48:32,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22522 states and 67856 transitions. [2021-06-05 15:48:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:32,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:32,314 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:32,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 15:48:32,514 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:32,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2074193219, now seen corresponding path program 174 times [2021-06-05 15:48:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:32,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979850495] [2021-06-05 15:48:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:32,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:32,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979850495] [2021-06-05 15:48:32,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979850495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:32,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393337571] [2021-06-05 15:48:32,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:32,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:48:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:48:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:33,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 15:48:33,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:33,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:33,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:33,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:30 [2021-06-05 15:48:33,330 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:33,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:48:33,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:33,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:33,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:33,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:48:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:33,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393337571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:33,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:33,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2021-06-05 15:48:33,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703270068] [2021-06-05 15:48:33,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:48:33,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:48:33,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:48:33,476 INFO L87 Difference]: Start difference. First operand 22522 states and 67856 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:37,035 INFO L93 Difference]: Finished difference Result 25634 states and 76422 transitions. [2021-06-05 15:48:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:48:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:37,067 INFO L225 Difference]: With dead ends: 25634 [2021-06-05 15:48:37,067 INFO L226 Difference]: Without dead ends: 25253 [2021-06-05 15:48:37,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2668.1ms TimeCoverageRelationStatistics Valid=570, Invalid=7440, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:48:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25253 states. [2021-06-05 15:48:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25253 to 22595. [2021-06-05 15:48:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22595 states, 22594 states have (on average 3.0117287775515624) internal successors, (68047), 22594 states have internal predecessors, (68047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22595 states to 22595 states and 68047 transitions. [2021-06-05 15:48:37,346 INFO L78 Accepts]: Start accepts. Automaton has 22595 states and 68047 transitions. Word has length 54 [2021-06-05 15:48:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:37,346 INFO L482 AbstractCegarLoop]: Abstraction has 22595 states and 68047 transitions. [2021-06-05 15:48:37,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 22595 states and 68047 transitions. [2021-06-05 15:48:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:37,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:37,366 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:37,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:37,567 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:37,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1149620327, now seen corresponding path program 175 times [2021-06-05 15:48:37,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:37,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573254953] [2021-06-05 15:48:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:37,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:37,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573254953] [2021-06-05 15:48:37,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573254953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:37,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149014988] [2021-06-05 15:48:37,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:37,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:38,207 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:38,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:38,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:38,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:38,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:38,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:48:38,346 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:38,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:48:38,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:38,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:38,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:38,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:48:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:38,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149014988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:38,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:38,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:48:38,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493751953] [2021-06-05 15:48:38,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:48:38,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:38,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:48:38,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:48:38,487 INFO L87 Difference]: Start difference. First operand 22595 states and 68047 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:41,240 INFO L93 Difference]: Finished difference Result 26965 states and 79874 transitions. [2021-06-05 15:48:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:48:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:41,275 INFO L225 Difference]: With dead ends: 26965 [2021-06-05 15:48:41,275 INFO L226 Difference]: Without dead ends: 26390 [2021-06-05 15:48:41,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1884.1ms TimeCoverageRelationStatistics Valid=360, Invalid=4896, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:48:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26390 states. [2021-06-05 15:48:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26390 to 22428. [2021-06-05 15:48:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22428 states, 22427 states have (on average 3.01261871850894) internal successors, (67564), 22427 states have internal predecessors, (67564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22428 states to 22428 states and 67564 transitions. [2021-06-05 15:48:41,632 INFO L78 Accepts]: Start accepts. Automaton has 22428 states and 67564 transitions. Word has length 54 [2021-06-05 15:48:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:41,632 INFO L482 AbstractCegarLoop]: Abstraction has 22428 states and 67564 transitions. [2021-06-05 15:48:41,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 22428 states and 67564 transitions. [2021-06-05 15:48:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:41,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:41,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:41,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:41,853 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -661263769, now seen corresponding path program 176 times [2021-06-05 15:48:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:41,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960120533] [2021-06-05 15:48:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:42,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:42,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960120533] [2021-06-05 15:48:42,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960120533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:42,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966768099] [2021-06-05 15:48:42,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:42,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:48:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:42,479 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:48:42,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:48:42,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:42,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:42,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:42,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 15:48:42,618 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:42,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:48:42,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:42,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:42,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:42,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:48:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:42,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966768099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:42,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:42,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:48:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101703217] [2021-06-05 15:48:42,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:48:42,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:48:42,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:48:42,762 INFO L87 Difference]: Start difference. First operand 22428 states and 67564 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:46,153 INFO L93 Difference]: Finished difference Result 27159 states and 80399 transitions. [2021-06-05 15:48:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:48:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:46,189 INFO L225 Difference]: With dead ends: 27159 [2021-06-05 15:48:46,189 INFO L226 Difference]: Without dead ends: 26712 [2021-06-05 15:48:46,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 2204.9ms TimeCoverageRelationStatistics Valid=435, Invalid=6045, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:48:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26712 states. [2021-06-05 15:48:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26712 to 22413. [2021-06-05 15:48:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22413 states, 22412 states have (on average 3.0134303051936464) internal successors, (67537), 22412 states have internal predecessors, (67537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22413 states to 22413 states and 67537 transitions. [2021-06-05 15:48:46,477 INFO L78 Accepts]: Start accepts. Automaton has 22413 states and 67537 transitions. Word has length 54 [2021-06-05 15:48:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:46,477 INFO L482 AbstractCegarLoop]: Abstraction has 22413 states and 67537 transitions. [2021-06-05 15:48:46,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22413 states and 67537 transitions. [2021-06-05 15:48:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:46,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:46,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:46,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 15:48:46,698 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash 828652195, now seen corresponding path program 177 times [2021-06-05 15:48:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:46,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501528299] [2021-06-05 15:48:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:47,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:47,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501528299] [2021-06-05 15:48:47,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501528299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:47,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824650743] [2021-06-05 15:48:47,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:47,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:48:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:47,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:47,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:47,423 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:47,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:47,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:47,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:47,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:47,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 15:48:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:48:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:47,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 15:48:47,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:47,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:47,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:47,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 15:48:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:47,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824650743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:47,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:47,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:48:47,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364980321] [2021-06-05 15:48:47,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:48:47,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:47,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:48:47,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:48:47,721 INFO L87 Difference]: Start difference. First operand 22413 states and 67537 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:51,698 INFO L93 Difference]: Finished difference Result 28724 states and 85176 transitions. [2021-06-05 15:48:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:48:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:51,737 INFO L225 Difference]: With dead ends: 28724 [2021-06-05 15:48:51,737 INFO L226 Difference]: Without dead ends: 28503 [2021-06-05 15:48:51,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2401.8ms TimeCoverageRelationStatistics Valid=439, Invalid=5723, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:48:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28503 states. [2021-06-05 15:48:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28503 to 22463. [2021-06-05 15:48:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22463 states, 22462 states have (on average 3.0117086635206127) internal successors, (67649), 22462 states have internal predecessors, (67649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22463 states to 22463 states and 67649 transitions. [2021-06-05 15:48:52,135 INFO L78 Accepts]: Start accepts. Automaton has 22463 states and 67649 transitions. Word has length 54 [2021-06-05 15:48:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:52,135 INFO L482 AbstractCegarLoop]: Abstraction has 22463 states and 67649 transitions. [2021-06-05 15:48:52,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 22463 states and 67649 transitions. [2021-06-05 15:48:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:52,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:52,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:52,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:52,357 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1872214905, now seen corresponding path program 178 times [2021-06-05 15:48:52,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:52,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336317307] [2021-06-05 15:48:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:52,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336317307] [2021-06-05 15:48:52,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336317307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238369367] [2021-06-05 15:48:52,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:52,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:48:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:48:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:52,985 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:52,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:48:52,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:52,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:52,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:52,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:48:53,092 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:53,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:48:53,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:53,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:53,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:53,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:48:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:53,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238369367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:53,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:53,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:48:53,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742092808] [2021-06-05 15:48:53,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:48:53,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:48:53,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:48:53,289 INFO L87 Difference]: Start difference. First operand 22463 states and 67649 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:57,030 INFO L93 Difference]: Finished difference Result 30237 states and 89270 transitions. [2021-06-05 15:48:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:48:57,031 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:57,072 INFO L225 Difference]: With dead ends: 30237 [2021-06-05 15:48:57,072 INFO L226 Difference]: Without dead ends: 29849 [2021-06-05 15:48:57,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2388.2ms TimeCoverageRelationStatistics Valid=504, Invalid=6978, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 15:48:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29849 states. [2021-06-05 15:48:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29849 to 22392. [2021-06-05 15:48:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22392 states, 22391 states have (on average 3.0137555267741503) internal successors, (67481), 22391 states have internal predecessors, (67481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22392 states to 22392 states and 67481 transitions. [2021-06-05 15:48:57,483 INFO L78 Accepts]: Start accepts. Automaton has 22392 states and 67481 transitions. Word has length 54 [2021-06-05 15:48:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:57,484 INFO L482 AbstractCegarLoop]: Abstraction has 22392 states and 67481 transitions. [2021-06-05 15:48:57,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 22392 states and 67481 transitions. [2021-06-05 15:48:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:57,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:57,506 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:57,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 15:48:57,706 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1114390511, now seen corresponding path program 179 times [2021-06-05 15:48:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:57,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103630088] [2021-06-05 15:48:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:58,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103630088] [2021-06-05 15:48:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103630088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288590580] [2021-06-05 15:48:58,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:58,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:48:58,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:58,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:48:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:58,353 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:48:58,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:48:58,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:58,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:58,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:48:58,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2021-06-05 15:48:58,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:48:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:58,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 15:48:58,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:58,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:58,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:58,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:13 [2021-06-05 15:48:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:58,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288590580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:58,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:58,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:48:58,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056757091] [2021-06-05 15:48:58,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:48:58,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:48:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:48:58,738 INFO L87 Difference]: Start difference. First operand 22392 states and 67481 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:02,011 INFO L93 Difference]: Finished difference Result 26097 states and 77618 transitions. [2021-06-05 15:49:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:49:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:02,047 INFO L225 Difference]: With dead ends: 26097 [2021-06-05 15:49:02,047 INFO L226 Difference]: Without dead ends: 25876 [2021-06-05 15:49:02,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1974.4ms TimeCoverageRelationStatistics Valid=339, Invalid=4353, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:49:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25876 states. [2021-06-05 15:49:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25876 to 22477. [2021-06-05 15:49:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22477 states, 22476 states have (on average 3.011923829862965) internal successors, (67696), 22476 states have internal predecessors, (67696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22477 states to 22477 states and 67696 transitions. [2021-06-05 15:49:02,342 INFO L78 Accepts]: Start accepts. Automaton has 22477 states and 67696 transitions. Word has length 54 [2021-06-05 15:49:02,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:02,342 INFO L482 AbstractCegarLoop]: Abstraction has 22477 states and 67696 transitions. [2021-06-05 15:49:02,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22477 states and 67696 transitions. [2021-06-05 15:49:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:02,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:02,364 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:02,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 15:49:02,564 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2063723439, now seen corresponding path program 180 times [2021-06-05 15:49:02,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:02,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095742738] [2021-06-05 15:49:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:03,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095742738] [2021-06-05 15:49:03,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095742738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:03,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510347683] [2021-06-05 15:49:03,052 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:03,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:49:03,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:49:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:03,312 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:03,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:49:03,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:03,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:03,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:03,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 15:49:03,467 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:03,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:49:03,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:03,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:03,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:03,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:49:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:03,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510347683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:03,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:03,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:03,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446400132] [2021-06-05 15:49:03,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:03,605 INFO L87 Difference]: Start difference. First operand 22477 states and 67696 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:06,358 INFO L93 Difference]: Finished difference Result 26344 states and 78265 transitions. [2021-06-05 15:49:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:49:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:06,394 INFO L225 Difference]: With dead ends: 26344 [2021-06-05 15:49:06,394 INFO L226 Difference]: Without dead ends: 26059 [2021-06-05 15:49:06,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1825.7ms TimeCoverageRelationStatistics Valid=306, Invalid=3984, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:49:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26059 states. [2021-06-05 15:49:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26059 to 22401. [2021-06-05 15:49:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22401 states, 22400 states have (on average 3.013705357142857) internal successors, (67507), 22400 states have internal predecessors, (67507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22401 states to 22401 states and 67507 transitions. [2021-06-05 15:49:06,684 INFO L78 Accepts]: Start accepts. Automaton has 22401 states and 67507 transitions. Word has length 54 [2021-06-05 15:49:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:06,684 INFO L482 AbstractCegarLoop]: Abstraction has 22401 states and 67507 transitions. [2021-06-05 15:49:06,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:06,684 INFO L276 IsEmpty]: Start isEmpty. Operand 22401 states and 67507 transitions. [2021-06-05 15:49:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:06,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:06,706 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:06,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 15:49:06,906 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2047330315, now seen corresponding path program 181 times [2021-06-05 15:49:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:06,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597643145] [2021-06-05 15:49:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:07,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597643145] [2021-06-05 15:49:07,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597643145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:07,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959458271] [2021-06-05 15:49:07,260 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:07,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:07,526 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:07,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:49:07,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:07,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:07,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:07,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:49:07,667 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:49:07,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:49:07,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:07,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:07,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:07,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:49:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:07,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959458271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:07,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:07,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:07,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967462094] [2021-06-05 15:49:07,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:07,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:07,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:07,903 INFO L87 Difference]: Start difference. First operand 22401 states and 67507 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:11,078 INFO L93 Difference]: Finished difference Result 26702 states and 79255 transitions. [2021-06-05 15:49:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:49:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:11,113 INFO L225 Difference]: With dead ends: 26702 [2021-06-05 15:49:11,113 INFO L226 Difference]: Without dead ends: 26376 [2021-06-05 15:49:11,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1993.1ms TimeCoverageRelationStatistics Valid=375, Invalid=5175, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:49:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26376 states. [2021-06-05 15:49:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26376 to 22413. [2021-06-05 15:49:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22413 states, 22412 states have (on average 3.0135641620560416) internal successors, (67540), 22412 states have internal predecessors, (67540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22413 states to 22413 states and 67540 transitions. [2021-06-05 15:49:11,403 INFO L78 Accepts]: Start accepts. Automaton has 22413 states and 67540 transitions. Word has length 54 [2021-06-05 15:49:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:11,403 INFO L482 AbstractCegarLoop]: Abstraction has 22413 states and 67540 transitions. [2021-06-05 15:49:11,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22413 states and 67540 transitions. [2021-06-05 15:49:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:11,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:11,425 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:11,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:11,625 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash -726874581, now seen corresponding path program 182 times [2021-06-05 15:49:11,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:11,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759115386] [2021-06-05 15:49:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:11,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:11,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759115386] [2021-06-05 15:49:11,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759115386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:11,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988772191] [2021-06-05 15:49:11,977 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:12,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:49:12,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:12,234 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:49:12,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:49:12,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:12,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:12,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:12,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 15:49:12,341 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:12,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:49:12,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:12,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:12,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:12,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:49:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:12,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988772191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:12,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:12,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182774719] [2021-06-05 15:49:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:12,515 INFO L87 Difference]: Start difference. First operand 22413 states and 67540 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:15,561 INFO L93 Difference]: Finished difference Result 29140 states and 86440 transitions. [2021-06-05 15:49:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:49:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:15,600 INFO L225 Difference]: With dead ends: 29140 [2021-06-05 15:49:15,600 INFO L226 Difference]: Without dead ends: 28919 [2021-06-05 15:49:15,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1933.1ms TimeCoverageRelationStatistics Valid=354, Invalid=4758, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:49:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28919 states. [2021-06-05 15:49:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28919 to 22417. [2021-06-05 15:49:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22417 states, 22416 states have (on average 3.013517130620985) internal successors, (67551), 22416 states have internal predecessors, (67551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22417 states to 22417 states and 67551 transitions. [2021-06-05 15:49:15,906 INFO L78 Accepts]: Start accepts. Automaton has 22417 states and 67551 transitions. Word has length 54 [2021-06-05 15:49:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:15,906 INFO L482 AbstractCegarLoop]: Abstraction has 22417 states and 67551 transitions. [2021-06-05 15:49:15,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 22417 states and 67551 transitions. [2021-06-05 15:49:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:15,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:15,927 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:16,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:16,127 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash 867225615, now seen corresponding path program 183 times [2021-06-05 15:49:16,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:16,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077652258] [2021-06-05 15:49:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:16,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:16,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077652258] [2021-06-05 15:49:16,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077652258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:16,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420161597] [2021-06-05 15:49:16,481 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:16,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:49:16,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:16,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:16,742 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:16,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:49:16,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:16,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:16,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:16,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 15:49:16,848 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:16,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:49:16,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:16,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:16,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:16,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:49:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:17,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420161597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:17,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:17,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:17,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188005089] [2021-06-05 15:49:17,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:17,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:17,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:17,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:17,021 INFO L87 Difference]: Start difference. First operand 22417 states and 67551 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:20,231 INFO L93 Difference]: Finished difference Result 29708 states and 87988 transitions. [2021-06-05 15:49:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:49:20,232 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:20,270 INFO L225 Difference]: With dead ends: 29708 [2021-06-05 15:49:20,270 INFO L226 Difference]: Without dead ends: 29522 [2021-06-05 15:49:20,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2054.6ms TimeCoverageRelationStatistics Valid=377, Invalid=5323, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:49:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29522 states. [2021-06-05 15:49:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29522 to 22401. [2021-06-05 15:49:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22401 states, 22400 states have (on average 3.013705357142857) internal successors, (67507), 22400 states have internal predecessors, (67507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22401 states to 22401 states and 67507 transitions. [2021-06-05 15:49:20,575 INFO L78 Accepts]: Start accepts. Automaton has 22401 states and 67507 transitions. Word has length 54 [2021-06-05 15:49:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:20,576 INFO L482 AbstractCegarLoop]: Abstraction has 22401 states and 67507 transitions. [2021-06-05 15:49:20,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22401 states and 67507 transitions. [2021-06-05 15:49:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:20,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:20,596 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:20,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 15:49:20,798 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash -874430943, now seen corresponding path program 184 times [2021-06-05 15:49:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:20,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546123130] [2021-06-05 15:49:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:21,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:21,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546123130] [2021-06-05 15:49:21,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546123130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:21,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304170447] [2021-06-05 15:49:21,139 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:21,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:21,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:21,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:21,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:21,369 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:21,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:49:21,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:21,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:21,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:21,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:49:21,537 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:21,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:49:21,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:21,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:21,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:21,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:49:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:21,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304170447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:21,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:21,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:21,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829397426] [2021-06-05 15:49:21,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:21,679 INFO L87 Difference]: Start difference. First operand 22401 states and 67507 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:24,289 INFO L93 Difference]: Finished difference Result 26449 states and 78529 transitions. [2021-06-05 15:49:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:49:24,289 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:24,323 INFO L225 Difference]: With dead ends: 26449 [2021-06-05 15:49:24,323 INFO L226 Difference]: Without dead ends: 26111 [2021-06-05 15:49:24,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1747.1ms TimeCoverageRelationStatistics Valid=333, Invalid=4223, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:49:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26111 states. [2021-06-05 15:49:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26111 to 22416. [2021-06-05 15:49:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22416 states, 22415 states have (on average 3.013696185590007) internal successors, (67552), 22415 states have internal predecessors, (67552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22416 states to 22416 states and 67552 transitions. [2021-06-05 15:49:24,605 INFO L78 Accepts]: Start accepts. Automaton has 22416 states and 67552 transitions. Word has length 54 [2021-06-05 15:49:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:24,606 INFO L482 AbstractCegarLoop]: Abstraction has 22416 states and 67552 transitions. [2021-06-05 15:49:24,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22416 states and 67552 transitions. [2021-06-05 15:49:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:24,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:24,626 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:24,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:24,829 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1193779097, now seen corresponding path program 185 times [2021-06-05 15:49:24,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:24,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599151285] [2021-06-05 15:49:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:25,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599151285] [2021-06-05 15:49:25,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599151285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041177525] [2021-06-05 15:49:25,195 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:25,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:49:25,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:25,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:25,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-05 15:49:25,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:25,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:25,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:25,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:23 [2021-06-05 15:49:25,778 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:49:25,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:49:25,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:25,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:25,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:25,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 15:49:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:25,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041177525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:25,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:25,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-06-05 15:49:25,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865895177] [2021-06-05 15:49:25,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:49:25,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:49:25,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:49:25,994 INFO L87 Difference]: Start difference. First operand 22416 states and 67552 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:31,581 INFO L93 Difference]: Finished difference Result 27133 states and 80664 transitions. [2021-06-05 15:49:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 15:49:31,582 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:31,617 INFO L225 Difference]: With dead ends: 27133 [2021-06-05 15:49:31,617 INFO L226 Difference]: Without dead ends: 26890 [2021-06-05 15:49:31,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 3921.8ms TimeCoverageRelationStatistics Valid=890, Invalid=13152, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 15:49:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26890 states. [2021-06-05 15:49:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26890 to 22687. [2021-06-05 15:49:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22687 states, 22686 states have (on average 3.010006171206912) internal successors, (68285), 22686 states have internal predecessors, (68285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22687 states to 22687 states and 68285 transitions. [2021-06-05 15:49:31,902 INFO L78 Accepts]: Start accepts. Automaton has 22687 states and 68285 transitions. Word has length 54 [2021-06-05 15:49:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:31,902 INFO L482 AbstractCegarLoop]: Abstraction has 22687 states and 68285 transitions. [2021-06-05 15:49:31,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 22687 states and 68285 transitions. [2021-06-05 15:49:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:31,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:31,923 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:32,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 15:49:32,123 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:32,123 INFO L82 PathProgramCache]: Analyzing trace with hash 637452473, now seen corresponding path program 186 times [2021-06-05 15:49:32,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:32,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219910277] [2021-06-05 15:49:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:32,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:32,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219910277] [2021-06-05 15:49:32,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219910277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:32,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612840690] [2021-06-05 15:49:32,480 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:32,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:49:32,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:32,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:49:32,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:32,710 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:49:32,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:32,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:49:32,877 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:49:32,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:32,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:49:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:33,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612840690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:33,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:33,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:49:33,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355267437] [2021-06-05 15:49:33,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:49:33,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:33,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:49:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:49:33,076 INFO L87 Difference]: Start difference. First operand 22687 states and 68285 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:35,657 INFO L93 Difference]: Finished difference Result 26723 states and 79264 transitions. [2021-06-05 15:49:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:49:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:35,693 INFO L225 Difference]: With dead ends: 26723 [2021-06-05 15:49:35,693 INFO L226 Difference]: Without dead ends: 26406 [2021-06-05 15:49:35,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1837.5ms TimeCoverageRelationStatistics Valid=352, Invalid=4618, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:49:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-06-05 15:49:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 22686. [2021-06-05 15:49:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22686 states, 22685 states have (on average 3.0098743663213576) internal successors, (68279), 22685 states have internal predecessors, (68279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22686 states to 22686 states and 68279 transitions. [2021-06-05 15:49:35,986 INFO L78 Accepts]: Start accepts. Automaton has 22686 states and 68279 transitions. Word has length 54 [2021-06-05 15:49:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:35,986 INFO L482 AbstractCegarLoop]: Abstraction has 22686 states and 68279 transitions. [2021-06-05 15:49:35,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 22686 states and 68279 transitions. [2021-06-05 15:49:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:36,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:36,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:36,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:36,207 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:36,208 INFO L82 PathProgramCache]: Analyzing trace with hash 733464939, now seen corresponding path program 187 times [2021-06-05 15:49:36,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:36,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010709951] [2021-06-05 15:49:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:36,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010709951] [2021-06-05 15:49:36,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010709951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930455576] [2021-06-05 15:49:36,549 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:36,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:36,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:49:36,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:36,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:36,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:36,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:49:36,942 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:36,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:49:36,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:36,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:36,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:36,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:49:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:37,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930455576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:37,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:37,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910551497] [2021-06-05 15:49:37,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:37,088 INFO L87 Difference]: Start difference. First operand 22686 states and 68279 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:40,039 INFO L93 Difference]: Finished difference Result 26443 states and 78505 transitions. [2021-06-05 15:49:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:49:40,039 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:40,074 INFO L225 Difference]: With dead ends: 26443 [2021-06-05 15:49:40,074 INFO L226 Difference]: Without dead ends: 26082 [2021-06-05 15:49:40,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1791.1ms TimeCoverageRelationStatistics Valid=325, Invalid=4367, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:49:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26082 states. [2021-06-05 15:49:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26082 to 22674. [2021-06-05 15:49:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22674 states, 22673 states have (on average 3.0101883297313985) internal successors, (68250), 22673 states have internal predecessors, (68250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22674 states to 22674 states and 68250 transitions. [2021-06-05 15:49:40,366 INFO L78 Accepts]: Start accepts. Automaton has 22674 states and 68250 transitions. Word has length 54 [2021-06-05 15:49:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:40,366 INFO L482 AbstractCegarLoop]: Abstraction has 22674 states and 68250 transitions. [2021-06-05 15:49:40,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 22674 states and 68250 transitions. [2021-06-05 15:49:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:40,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:40,387 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:40,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:40,588 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:40,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:40,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1377324187, now seen corresponding path program 188 times [2021-06-05 15:49:40,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:40,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879822066] [2021-06-05 15:49:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:40,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:40,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879822066] [2021-06-05 15:49:40,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879822066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:40,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524994961] [2021-06-05 15:49:40,941 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:40,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:49:40,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:41,173 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:49:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:49:41,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:41,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:41,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:41,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:49:41,343 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:41,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:49:41,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:41,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:41,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:41,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:49:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:41,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524994961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:41,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:41,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:41,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616406027] [2021-06-05 15:49:41,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:41,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:41,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:41,486 INFO L87 Difference]: Start difference. First operand 22674 states and 68250 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:44,151 INFO L93 Difference]: Finished difference Result 26641 states and 79072 transitions. [2021-06-05 15:49:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:49:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:44,185 INFO L225 Difference]: With dead ends: 26641 [2021-06-05 15:49:44,185 INFO L226 Difference]: Without dead ends: 26303 [2021-06-05 15:49:44,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1741.1ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:49:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-06-05 15:49:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 22675. [2021-06-05 15:49:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22675 states, 22674 states have (on average 3.0102319837699567) internal successors, (68254), 22674 states have internal predecessors, (68254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22675 states to 22675 states and 68254 transitions. [2021-06-05 15:49:44,473 INFO L78 Accepts]: Start accepts. Automaton has 22675 states and 68254 transitions. Word has length 54 [2021-06-05 15:49:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:44,473 INFO L482 AbstractCegarLoop]: Abstraction has 22675 states and 68254 transitions. [2021-06-05 15:49:44,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 22675 states and 68254 transitions. [2021-06-05 15:49:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:44,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:44,495 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:44,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 15:49:44,695 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash 690885853, now seen corresponding path program 189 times [2021-06-05 15:49:44,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:44,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250120746] [2021-06-05 15:49:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:45,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250120746] [2021-06-05 15:49:45,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250120746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648489041] [2021-06-05 15:49:45,038 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:45,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:49:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:49:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:45,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:45,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 15:49:45,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:45,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:45,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:45,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-06-05 15:49:45,536 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:45,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:49:45,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:45,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:45,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:45,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:49:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:45,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648489041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:45,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:45,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2021-06-05 15:49:45,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958798544] [2021-06-05 15:49:45,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:49:45,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:49:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:49:45,683 INFO L87 Difference]: Start difference. First operand 22675 states and 68254 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:49,597 INFO L93 Difference]: Finished difference Result 25966 states and 77257 transitions. [2021-06-05 15:49:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 15:49:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:49,630 INFO L225 Difference]: With dead ends: 25966 [2021-06-05 15:49:49,630 INFO L226 Difference]: Without dead ends: 25506 [2021-06-05 15:49:49,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 2897.9ms TimeCoverageRelationStatistics Valid=601, Invalid=8329, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 15:49:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25506 states. [2021-06-05 15:49:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25506 to 22632. [2021-06-05 15:49:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22632 states, 22631 states have (on average 3.011797976227299) internal successors, (68160), 22631 states have internal predecessors, (68160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22632 states to 22632 states and 68160 transitions. [2021-06-05 15:49:49,911 INFO L78 Accepts]: Start accepts. Automaton has 22632 states and 68160 transitions. Word has length 54 [2021-06-05 15:49:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:49,911 INFO L482 AbstractCegarLoop]: Abstraction has 22632 states and 68160 transitions. [2021-06-05 15:49:49,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 22632 states and 68160 transitions. [2021-06-05 15:49:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:49,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:49,933 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:50,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 15:49:50,133 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -233687039, now seen corresponding path program 190 times [2021-06-05 15:49:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:50,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687492599] [2021-06-05 15:49:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:50,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:50,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687492599] [2021-06-05 15:49:50,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687492599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301955229] [2021-06-05 15:49:50,488 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:50,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:50,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:49:50,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:50,714 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:50,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:49:50,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:50,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:49:50,877 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:50,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:49:50,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:50,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:49:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:51,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301955229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:51,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:51,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:49:51,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182799592] [2021-06-05 15:49:51,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:49:51,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:51,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:49:51,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:49:51,019 INFO L87 Difference]: Start difference. First operand 22632 states and 68160 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:53,802 INFO L93 Difference]: Finished difference Result 27095 states and 80261 transitions. [2021-06-05 15:49:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:49:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:53,838 INFO L225 Difference]: With dead ends: 27095 [2021-06-05 15:49:53,838 INFO L226 Difference]: Without dead ends: 26636 [2021-06-05 15:49:53,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1916.2ms TimeCoverageRelationStatistics Valid=378, Invalid=5172, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:49:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26636 states. [2021-06-05 15:49:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26636 to 22642. [2021-06-05 15:49:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22642 states, 22641 states have (on average 3.011439424053708) internal successors, (68182), 22641 states have internal predecessors, (68182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22642 states to 22642 states and 68182 transitions. [2021-06-05 15:49:54,187 INFO L78 Accepts]: Start accepts. Automaton has 22642 states and 68182 transitions. Word has length 54 [2021-06-05 15:49:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:54,187 INFO L482 AbstractCegarLoop]: Abstraction has 22642 states and 68182 transitions. [2021-06-05 15:49:54,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22642 states and 68182 transitions. [2021-06-05 15:49:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:54,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:54,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:54,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 15:49:54,408 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2044571135, now seen corresponding path program 191 times [2021-06-05 15:49:54,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:54,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171758080] [2021-06-05 15:49:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171758080] [2021-06-05 15:49:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171758080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157950474] [2021-06-05 15:49:54,753 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:54,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:49:54,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:49:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:55,044 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:49:55,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:49:55,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:55,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:55,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:55,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:49:55,207 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:49:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:49:55,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:55,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:55,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:55,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:49:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:55,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157950474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:55,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:55,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:49:55,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295707622] [2021-06-05 15:49:55,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:49:55,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:49:55,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:49:55,352 INFO L87 Difference]: Start difference. First operand 22642 states and 68182 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:58,924 INFO L93 Difference]: Finished difference Result 27657 states and 81801 transitions. [2021-06-05 15:49:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:49:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:49:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:59,036 INFO L225 Difference]: With dead ends: 27657 [2021-06-05 15:49:59,036 INFO L226 Difference]: Without dead ends: 27210 [2021-06-05 15:49:59,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 2492.5ms TimeCoverageRelationStatistics Valid=551, Invalid=7639, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 15:49:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27210 states. [2021-06-05 15:49:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27210 to 22676. [2021-06-05 15:49:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22676 states, 22675 states have (on average 3.0112458654906282) internal successors, (68280), 22675 states have internal predecessors, (68280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22676 states to 22676 states and 68280 transitions. [2021-06-05 15:49:59,311 INFO L78 Accepts]: Start accepts. Automaton has 22676 states and 68280 transitions. Word has length 54 [2021-06-05 15:49:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:59,311 INFO L482 AbstractCegarLoop]: Abstraction has 22676 states and 68280 transitions. [2021-06-05 15:49:59,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 22676 states and 68280 transitions. [2021-06-05 15:49:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:49:59,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:59,332 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:59,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:59,532 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash -554655171, now seen corresponding path program 192 times [2021-06-05 15:49:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:59,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200069527] [2021-06-05 15:49:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:49:59,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:59,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200069527] [2021-06-05 15:49:59,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200069527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:59,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006793731] [2021-06-05 15:49:59,878 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:59,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:49:59,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:59,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:49:59,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:00,107 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:00,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:50:00,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:00,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:00,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:00,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:50:00,239 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:00,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:50:00,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:00,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:00,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:00,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:50:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:00,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006793731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:00,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:00,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:00,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182441004] [2021-06-05 15:50:00,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:00,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:00,411 INFO L87 Difference]: Start difference. First operand 22676 states and 68280 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:04,178 INFO L93 Difference]: Finished difference Result 30104 states and 88987 transitions. [2021-06-05 15:50:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:50:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:04,223 INFO L225 Difference]: With dead ends: 30104 [2021-06-05 15:50:04,223 INFO L226 Difference]: Without dead ends: 29801 [2021-06-05 15:50:04,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 2315.4ms TimeCoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:50:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29801 states. [2021-06-05 15:50:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29801 to 22674. [2021-06-05 15:50:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22674 states, 22673 states have (on average 3.0113350681427247) internal successors, (68276), 22673 states have internal predecessors, (68276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22674 states to 22674 states and 68276 transitions. [2021-06-05 15:50:04,553 INFO L78 Accepts]: Start accepts. Automaton has 22674 states and 68276 transitions. Word has length 54 [2021-06-05 15:50:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:04,553 INFO L482 AbstractCegarLoop]: Abstraction has 22674 states and 68276 transitions. [2021-06-05 15:50:04,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 22674 states and 68276 transitions. [2021-06-05 15:50:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:04,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:04,574 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:04,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 15:50:04,775 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1039445025, now seen corresponding path program 193 times [2021-06-05 15:50:04,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:04,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060334395] [2021-06-05 15:50:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:05,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060334395] [2021-06-05 15:50:05,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060334395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38852037] [2021-06-05 15:50:05,125 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:50:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:05,353 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:05,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:50:05,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:05,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:05,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:05,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:50:05,489 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:05,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:50:05,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:05,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:05,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:05,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:50:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:05,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38852037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:05,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:05,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:05,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732635312] [2021-06-05 15:50:05,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:05,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:05,661 INFO L87 Difference]: Start difference. First operand 22674 states and 68276 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:09,641 INFO L93 Difference]: Finished difference Result 30986 states and 91342 transitions. [2021-06-05 15:50:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 15:50:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:09,683 INFO L225 Difference]: With dead ends: 30986 [2021-06-05 15:50:09,683 INFO L226 Difference]: Without dead ends: 30648 [2021-06-05 15:50:09,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 2641.4ms TimeCoverageRelationStatistics Valid=588, Invalid=8154, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:50:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30648 states. [2021-06-05 15:50:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30648 to 22728. [2021-06-05 15:50:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22728 states, 22727 states have (on average 3.010340124081489) internal successors, (68416), 22727 states have internal predecessors, (68416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22728 states to 22728 states and 68416 transitions. [2021-06-05 15:50:10,004 INFO L78 Accepts]: Start accepts. Automaton has 22728 states and 68416 transitions. Word has length 54 [2021-06-05 15:50:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:10,004 INFO L482 AbstractCegarLoop]: Abstraction has 22728 states and 68416 transitions. [2021-06-05 15:50:10,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 22728 states and 68416 transitions. [2021-06-05 15:50:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:10,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:10,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:10,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 15:50:10,225 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1797269419, now seen corresponding path program 194 times [2021-06-05 15:50:10,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:10,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191003666] [2021-06-05 15:50:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:10,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:10,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191003666] [2021-06-05 15:50:10,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191003666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:10,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942277040] [2021-06-05 15:50:10,561 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:10,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:10,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:50:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:10,787 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:50:10,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:50:10,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:10,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:10,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:10,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 15:50:10,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:10,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:50:10,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:10,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:10,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:10,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 15:50:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:11,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942277040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:11,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:11,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:11,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652899817] [2021-06-05 15:50:11,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:11,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:11,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:11,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:11,101 INFO L87 Difference]: Start difference. First operand 22728 states and 68416 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:14,176 INFO L93 Difference]: Finished difference Result 26801 states and 79519 transitions. [2021-06-05 15:50:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:50:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:14,209 INFO L225 Difference]: With dead ends: 26801 [2021-06-05 15:50:14,209 INFO L226 Difference]: Without dead ends: 26440 [2021-06-05 15:50:14,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1828.5ms TimeCoverageRelationStatistics Valid=341, Invalid=4489, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:50:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26440 states. [2021-06-05 15:50:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26440 to 22733. [2021-06-05 15:50:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22733 states, 22732 states have (on average 3.0102938588773536) internal successors, (68430), 22732 states have internal predecessors, (68430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22733 states to 22733 states and 68430 transitions. [2021-06-05 15:50:14,484 INFO L78 Accepts]: Start accepts. Automaton has 22733 states and 68430 transitions. Word has length 54 [2021-06-05 15:50:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:14,484 INFO L482 AbstractCegarLoop]: Abstraction has 22733 states and 68430 transitions. [2021-06-05 15:50:14,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 22733 states and 68430 transitions. [2021-06-05 15:50:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:14,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:14,505 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:14,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:14,709 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash 864329615, now seen corresponding path program 195 times [2021-06-05 15:50:14,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:14,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284752764] [2021-06-05 15:50:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:15,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:15,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284752764] [2021-06-05 15:50:15,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284752764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:15,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138212512] [2021-06-05 15:50:15,054 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:15,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:50:15,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:50:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:15,285 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:15,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:50:15,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:15,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:15,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:15,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:50:15,452 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:15,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:50:15,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:15,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:15,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:15,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:50:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:15,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138212512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:15,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:15,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:15,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664147326] [2021-06-05 15:50:15,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:15,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:15,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:15,598 INFO L87 Difference]: Start difference. First operand 22733 states and 68430 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:18,976 INFO L93 Difference]: Finished difference Result 27022 states and 80141 transitions. [2021-06-05 15:50:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:50:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:19,012 INFO L225 Difference]: With dead ends: 27022 [2021-06-05 15:50:19,012 INFO L226 Difference]: Without dead ends: 26696 [2021-06-05 15:50:19,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 2052.1ms TimeCoverageRelationStatistics Valid=400, Invalid=5452, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:50:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26696 states. [2021-06-05 15:50:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26696 to 22745. [2021-06-05 15:50:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22745 states, 22744 states have (on average 3.0101565247977486) internal successors, (68463), 22744 states have internal predecessors, (68463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22745 states to 22745 states and 68463 transitions. [2021-06-05 15:50:19,367 INFO L78 Accepts]: Start accepts. Automaton has 22745 states and 68463 transitions. Word has length 54 [2021-06-05 15:50:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:19,367 INFO L482 AbstractCegarLoop]: Abstraction has 22745 states and 68463 transitions. [2021-06-05 15:50:19,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 22745 states and 68463 transitions. [2021-06-05 15:50:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:19,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:19,390 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:19,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-06-05 15:50:19,591 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2110181947, now seen corresponding path program 196 times [2021-06-05 15:50:19,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:19,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996090619] [2021-06-05 15:50:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:19,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:19,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996090619] [2021-06-05 15:50:19,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996090619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:19,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663054651] [2021-06-05 15:50:19,944 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:19,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:19,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:50:19,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:20,176 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:20,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:50:20,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:20,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:20,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:20,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:50:20,310 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:50:20,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:50:20,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:20,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:20,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:20,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:50:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:20,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663054651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:20,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:20,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:20,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584418873] [2021-06-05 15:50:20,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:20,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:20,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:20,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:20,489 INFO L87 Difference]: Start difference. First operand 22745 states and 68463 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:23,542 INFO L93 Difference]: Finished difference Result 29468 states and 87348 transitions. [2021-06-05 15:50:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:50:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:23,582 INFO L225 Difference]: With dead ends: 29468 [2021-06-05 15:50:23,582 INFO L226 Difference]: Without dead ends: 29247 [2021-06-05 15:50:23,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1970.0ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:50:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29247 states. [2021-06-05 15:50:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29247 to 22749. [2021-06-05 15:50:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22749 states, 22748 states have (on average 3.0101107789695796) internal successors, (68474), 22748 states have internal predecessors, (68474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22749 states to 22749 states and 68474 transitions. [2021-06-05 15:50:23,955 INFO L78 Accepts]: Start accepts. Automaton has 22749 states and 68474 transitions. Word has length 54 [2021-06-05 15:50:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:23,955 INFO L482 AbstractCegarLoop]: Abstraction has 22749 states and 68474 transitions. [2021-06-05 15:50:23,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 22749 states and 68474 transitions. [2021-06-05 15:50:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:23,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:23,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:24,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:24,179 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:24,179 INFO L82 PathProgramCache]: Analyzing trace with hash -516081751, now seen corresponding path program 197 times [2021-06-05 15:50:24,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:24,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702541216] [2021-06-05 15:50:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:24,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:24,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702541216] [2021-06-05 15:50:24,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702541216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:24,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440940740] [2021-06-05 15:50:24,515 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:24,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:50:24,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:50:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:24,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:24,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:50:24,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:24,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:24,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:24,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:50:24,881 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:24,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:50:24,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:24,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:24,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:24,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 15:50:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:25,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440940740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:25,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:25,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:25,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918763681] [2021-06-05 15:50:25,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:25,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:25,059 INFO L87 Difference]: Start difference. First operand 22749 states and 68474 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:29,000 INFO L93 Difference]: Finished difference Result 30044 states and 88914 transitions. [2021-06-05 15:50:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:50:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:29,125 INFO L225 Difference]: With dead ends: 30044 [2021-06-05 15:50:29,125 INFO L226 Difference]: Without dead ends: 29858 [2021-06-05 15:50:29,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 2068.8ms TimeCoverageRelationStatistics Valid=402, Invalid=5604, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:50:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29858 states. [2021-06-05 15:50:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29858 to 22728. [2021-06-05 15:50:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22728 states, 22727 states have (on average 3.010340124081489) internal successors, (68416), 22727 states have internal predecessors, (68416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22728 states to 22728 states and 68416 transitions. [2021-06-05 15:50:29,421 INFO L78 Accepts]: Start accepts. Automaton has 22728 states and 68416 transitions. Word has length 54 [2021-06-05 15:50:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:29,421 INFO L482 AbstractCegarLoop]: Abstraction has 22728 states and 68416 transitions. [2021-06-05 15:50:29,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 22728 states and 68416 transitions. [2021-06-05 15:50:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:29,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:29,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:29,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:29,644 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:29,644 INFO L82 PathProgramCache]: Analyzing trace with hash 822578433, now seen corresponding path program 198 times [2021-06-05 15:50:29,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:29,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016880393] [2021-06-05 15:50:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:30,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:30,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016880393] [2021-06-05 15:50:30,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016880393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:30,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617139293] [2021-06-05 15:50:30,015 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:30,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:50:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:50:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:30,245 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:30,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:50:30,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:30,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:30,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:30,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:50:30,412 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:50:30,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:50:30,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:30,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:30,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:30,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:50:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:30,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617139293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:30,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:30,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:50:30,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522035772] [2021-06-05 15:50:30,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:50:30,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:30,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:50:30,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:50:30,618 INFO L87 Difference]: Start difference. First operand 22728 states and 68416 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:33,687 INFO L93 Difference]: Finished difference Result 26721 states and 79285 transitions. [2021-06-05 15:50:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:50:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:33,724 INFO L225 Difference]: With dead ends: 26721 [2021-06-05 15:50:33,725 INFO L226 Difference]: Without dead ends: 26360 [2021-06-05 15:50:33,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1942.1ms TimeCoverageRelationStatistics Valid=362, Invalid=5188, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:50:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26360 states. [2021-06-05 15:50:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26360 to 22740. [2021-06-05 15:50:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22740 states, 22739 states have (on average 3.01073046308105) internal successors, (68461), 22739 states have internal predecessors, (68461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22740 states to 22740 states and 68461 transitions. [2021-06-05 15:50:34,088 INFO L78 Accepts]: Start accepts. Automaton has 22740 states and 68461 transitions. Word has length 54 [2021-06-05 15:50:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:34,089 INFO L482 AbstractCegarLoop]: Abstraction has 22740 states and 68461 transitions. [2021-06-05 15:50:34,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22740 states and 68461 transitions. [2021-06-05 15:50:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:34,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:34,111 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:34,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:34,312 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash -579117251, now seen corresponding path program 199 times [2021-06-05 15:50:34,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:34,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868787632] [2021-06-05 15:50:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:34,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868787632] [2021-06-05 15:50:34,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868787632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107763977] [2021-06-05 15:50:34,646 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:34,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:50:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:34,872 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:50:34,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:50:34,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:34,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:34,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:34,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-06-05 15:50:35,040 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:35,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:50:35,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:35,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:35,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:35,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:50:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:35,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107763977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:35,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:35,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:35,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216086385] [2021-06-05 15:50:35,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:35,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:35,191 INFO L87 Difference]: Start difference. First operand 22740 states and 68461 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:38,029 INFO L93 Difference]: Finished difference Result 26826 states and 79697 transitions. [2021-06-05 15:50:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:50:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:38,064 INFO L225 Difference]: With dead ends: 26826 [2021-06-05 15:50:38,064 INFO L226 Difference]: Without dead ends: 26465 [2021-06-05 15:50:38,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1829.0ms TimeCoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:50:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26465 states. [2021-06-05 15:50:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26465 to 22744. [2021-06-05 15:50:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22744 states, 22743 states have (on average 3.0106846062524735) internal successors, (68472), 22743 states have internal predecessors, (68472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22744 states to 22744 states and 68472 transitions. [2021-06-05 15:50:38,480 INFO L78 Accepts]: Start accepts. Automaton has 22744 states and 68472 transitions. Word has length 54 [2021-06-05 15:50:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:38,480 INFO L482 AbstractCegarLoop]: Abstraction has 22744 states and 68472 transitions. [2021-06-05 15:50:38,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 22744 states and 68472 transitions. [2021-06-05 15:50:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:38,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:38,502 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:38,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 15:50:38,702 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:38,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1512057055, now seen corresponding path program 200 times [2021-06-05 15:50:38,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:38,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436559809] [2021-06-05 15:50:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:39,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:39,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436559809] [2021-06-05 15:50:39,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436559809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:39,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184778171] [2021-06-05 15:50:39,057 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:39,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:39,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:39,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:50:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:39,289 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:50:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 15:50:39,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:39,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:39,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:39,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:50:39,457 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:39,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:50:39,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:39,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:39,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:39,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:50:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:39,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184778171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:39,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:39,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:39,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067995612] [2021-06-05 15:50:39,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:39,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:39,606 INFO L87 Difference]: Start difference. First operand 22744 states and 68472 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:42,827 INFO L93 Difference]: Finished difference Result 27078 states and 80407 transitions. [2021-06-05 15:50:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:50:42,827 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:42,863 INFO L225 Difference]: With dead ends: 27078 [2021-06-05 15:50:42,863 INFO L226 Difference]: Without dead ends: 26752 [2021-06-05 15:50:42,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 2108.1ms TimeCoverageRelationStatistics Valid=389, Invalid=5617, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:50:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26752 states. [2021-06-05 15:50:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26752 to 22756. [2021-06-05 15:50:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22756 states, 22755 states have (on average 3.010547132498352) internal successors, (68505), 22755 states have internal predecessors, (68505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22756 states to 22756 states and 68505 transitions. [2021-06-05 15:50:43,261 INFO L78 Accepts]: Start accepts. Automaton has 22756 states and 68505 transitions. Word has length 54 [2021-06-05 15:50:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:43,261 INFO L482 AbstractCegarLoop]: Abstraction has 22756 states and 68505 transitions. [2021-06-05 15:50:43,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 22756 states and 68505 transitions. [2021-06-05 15:50:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:43,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:43,282 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:43,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:43,483 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:43,483 INFO L82 PathProgramCache]: Analyzing trace with hash -191601321, now seen corresponding path program 201 times [2021-06-05 15:50:43,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:43,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195248633] [2021-06-05 15:50:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:43,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:43,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195248633] [2021-06-05 15:50:43,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195248633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:43,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320829818] [2021-06-05 15:50:43,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:43,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:50:43,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:50:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:44,121 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:44,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:50:44,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:44,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:44,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:44,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:50:44,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:44,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 15:50:44,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:44,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:44,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:44,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 15:50:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:44,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320829818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:44,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:44,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:50:44,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211417210] [2021-06-05 15:50:44,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:50:44,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:44,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:50:44,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:50:44,509 INFO L87 Difference]: Start difference. First operand 22756 states and 68505 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:48,108 INFO L93 Difference]: Finished difference Result 28334 states and 84252 transitions. [2021-06-05 15:50:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:50:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:48,153 INFO L225 Difference]: With dead ends: 28334 [2021-06-05 15:50:48,153 INFO L226 Difference]: Without dead ends: 28113 [2021-06-05 15:50:48,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2195.9ms TimeCoverageRelationStatistics Valid=410, Invalid=5752, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:50:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28113 states. [2021-06-05 15:50:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28113 to 22760. [2021-06-05 15:50:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22760 states, 22759 states have (on average 3.0105013401291796) internal successors, (68516), 22759 states have internal predecessors, (68516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22760 states to 22760 states and 68516 transitions. [2021-06-05 15:50:48,470 INFO L78 Accepts]: Start accepts. Automaton has 22760 states and 68516 transitions. Word has length 54 [2021-06-05 15:50:48,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:48,470 INFO L482 AbstractCegarLoop]: Abstraction has 22760 states and 68516 transitions. [2021-06-05 15:50:48,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 22760 states and 68516 transitions. [2021-06-05 15:50:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:48,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:48,575 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:48,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 15:50:48,777 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1402498875, now seen corresponding path program 202 times [2021-06-05 15:50:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:48,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421848336] [2021-06-05 15:50:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:49,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421848336] [2021-06-05 15:50:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421848336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924288416] [2021-06-05 15:50:49,109 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:49,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:50:49,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:49,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:50:49,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:49,338 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:50:49,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 15:50:49,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:49,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-06-05 15:50:49,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:49,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:50:49,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:49,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:50:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:50:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924288416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:49,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:49,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:50:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539009553] [2021-06-05 15:50:49,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:50:49,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:49,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:50:49,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:50:49,650 INFO L87 Difference]: Start difference. First operand 22760 states and 68516 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:53,016 INFO L93 Difference]: Finished difference Result 29140 states and 86428 transitions. [2021-06-05 15:50:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:50:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:53,054 INFO L225 Difference]: With dead ends: 29140 [2021-06-05 15:50:53,054 INFO L226 Difference]: Without dead ends: 28954 [2021-06-05 15:50:53,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2065.8ms TimeCoverageRelationStatistics Valid=391, Invalid=5771, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:50:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28954 states. [2021-06-05 15:50:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28954 to 22772. [2021-06-05 15:50:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22772 states, 22771 states have (on average 3.0101883975231654) internal successors, (68545), 22771 states have internal predecessors, (68545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22772 states to 22772 states and 68545 transitions. [2021-06-05 15:50:53,459 INFO L78 Accepts]: Start accepts. Automaton has 22772 states and 68545 transitions. Word has length 54 [2021-06-05 15:50:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:53,459 INFO L482 AbstractCegarLoop]: Abstraction has 22772 states and 68545 transitions. [2021-06-05 15:50:53,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22772 states and 68545 transitions. [2021-06-05 15:50:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:53,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:53,479 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:53,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 15:50:53,679 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:53,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:53,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1232106971, now seen corresponding path program 203 times [2021-06-05 15:50:53,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:53,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813037469] [2021-06-05 15:50:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:50:54,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:54,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813037469] [2021-06-05 15:50:54,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813037469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:54,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446925482] [2021-06-05 15:50:54,088 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:54,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:50:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:50:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:54,428 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:54,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:50:54,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:54,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:54,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:54,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:50:54,503 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:54,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:50:54,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:54,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:54,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:54,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 15:50:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:54,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446925482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:54,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:54,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 15:50:54,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269746463] [2021-06-05 15:50:54,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:50:54,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:54,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:50:54,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:50:54,702 INFO L87 Difference]: Start difference. First operand 22772 states and 68545 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:56,422 INFO L93 Difference]: Finished difference Result 24154 states and 72280 transitions. [2021-06-05 15:50:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:50:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:50:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:56,452 INFO L225 Difference]: With dead ends: 24154 [2021-06-05 15:50:56,452 INFO L226 Difference]: Without dead ends: 23911 [2021-06-05 15:50:56,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1422.3ms TimeCoverageRelationStatistics Valid=266, Invalid=3394, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:50:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23911 states. [2021-06-05 15:50:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23911 to 22913. [2021-06-05 15:50:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22913 states, 22912 states have (on average 3.0077688547486034) internal successors, (68914), 22912 states have internal predecessors, (68914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22913 states to 22913 states and 68914 transitions. [2021-06-05 15:50:56,734 INFO L78 Accepts]: Start accepts. Automaton has 22913 states and 68914 transitions. Word has length 54 [2021-06-05 15:50:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:56,735 INFO L482 AbstractCegarLoop]: Abstraction has 22913 states and 68914 transitions. [2021-06-05 15:50:56,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 22913 states and 68914 transitions. [2021-06-05 15:50:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:50:56,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:56,756 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:56,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:56,957 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash 512105653, now seen corresponding path program 204 times [2021-06-05 15:50:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:56,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240726636] [2021-06-05 15:50:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:57,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:57,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240726636] [2021-06-05 15:50:57,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240726636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:57,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878580449] [2021-06-05 15:50:57,340 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:50:57,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:50:57,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:57,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:50:57,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:57,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:50:57,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 15:50:57,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:57,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:57,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:57,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:27 [2021-06-05 15:50:57,980 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:50:57,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:50:57,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:57,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:57,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:57,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:50:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:58,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878580449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:58,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:58,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-06-05 15:50:58,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803719458] [2021-06-05 15:50:58,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 15:50:58,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:58,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 15:50:58,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:50:58,177 INFO L87 Difference]: Start difference. First operand 22913 states and 68914 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:00,697 INFO L93 Difference]: Finished difference Result 24297 states and 72649 transitions. [2021-06-05 15:51:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:51:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:00,727 INFO L225 Difference]: With dead ends: 24297 [2021-06-05 15:51:00,727 INFO L226 Difference]: Without dead ends: 23787 [2021-06-05 15:51:00,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2125.3ms TimeCoverageRelationStatistics Valid=430, Invalid=5576, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:51:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23787 states. [2021-06-05 15:51:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23787 to 22858. [2021-06-05 15:51:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22858 states, 22857 states have (on average 3.008575053594085) internal successors, (68767), 22857 states have internal predecessors, (68767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22858 states to 22858 states and 68767 transitions. [2021-06-05 15:51:01,002 INFO L78 Accepts]: Start accepts. Automaton has 22858 states and 68767 transitions. Word has length 54 [2021-06-05 15:51:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:01,002 INFO L482 AbstractCegarLoop]: Abstraction has 22858 states and 68767 transitions. [2021-06-05 15:51:01,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 22858 states and 68767 transitions. [2021-06-05 15:51:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:01,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:01,024 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:01,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 15:51:01,234 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash 758945979, now seen corresponding path program 205 times [2021-06-05 15:51:01,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:01,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487638668] [2021-06-05 15:51:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:01,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:01,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487638668] [2021-06-05 15:51:01,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487638668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:01,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864668096] [2021-06-05 15:51:01,640 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:01,940 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:01,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:51:01,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:01,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:01,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:01,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:51:02,048 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:02,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:02,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:02,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:02,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:02,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:02,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864668096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:02,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:02,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:02,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295567819] [2021-06-05 15:51:02,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:02,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:02,192 INFO L87 Difference]: Start difference. First operand 22858 states and 68767 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:04,082 INFO L93 Difference]: Finished difference Result 24134 states and 72227 transitions. [2021-06-05 15:51:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:51:04,082 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:04,112 INFO L225 Difference]: With dead ends: 24134 [2021-06-05 15:51:04,112 INFO L226 Difference]: Without dead ends: 23796 [2021-06-05 15:51:04,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1414.8ms TimeCoverageRelationStatistics Valid=256, Invalid=3284, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:51:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23796 states. [2021-06-05 15:51:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23796 to 22923. [2021-06-05 15:51:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22923 states, 22922 states have (on average 3.0078963441235493) internal successors, (68947), 22922 states have internal predecessors, (68947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22923 states to 22923 states and 68947 transitions. [2021-06-05 15:51:04,395 INFO L78 Accepts]: Start accepts. Automaton has 22923 states and 68947 transitions. Word has length 54 [2021-06-05 15:51:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:04,395 INFO L482 AbstractCegarLoop]: Abstraction has 22923 states and 68947 transitions. [2021-06-05 15:51:04,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 22923 states and 68947 transitions. [2021-06-05 15:51:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:04,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:04,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:04,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 15:51:04,617 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:04,618 INFO L82 PathProgramCache]: Analyzing trace with hash -144168893, now seen corresponding path program 206 times [2021-06-05 15:51:04,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:04,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383730518] [2021-06-05 15:51:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:05,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:05,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383730518] [2021-06-05 15:51:05,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383730518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:05,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357053032] [2021-06-05 15:51:05,015 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:05,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:05,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:05,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:05,321 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:05,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:51:05,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:05,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:05,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:05,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:51:05,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:05,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:05,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:05,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:05,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:05,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:05,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357053032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:05,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:05,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 15:51:05,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510778333] [2021-06-05 15:51:05,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:51:05,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:05,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:51:05,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:51:05,646 INFO L87 Difference]: Start difference. First operand 22923 states and 68947 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:07,713 INFO L93 Difference]: Finished difference Result 24157 states and 72284 transitions. [2021-06-05 15:51:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:51:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:07,743 INFO L225 Difference]: With dead ends: 24157 [2021-06-05 15:51:07,743 INFO L226 Difference]: Without dead ends: 23776 [2021-06-05 15:51:07,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1602.8ms TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:51:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23776 states. [2021-06-05 15:51:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23776 to 22923. [2021-06-05 15:51:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22923 states, 22922 states have (on average 3.007198324753512) internal successors, (68931), 22922 states have internal predecessors, (68931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22923 states to 22923 states and 68931 transitions. [2021-06-05 15:51:08,025 INFO L78 Accepts]: Start accepts. Automaton has 22923 states and 68931 transitions. Word has length 54 [2021-06-05 15:51:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:08,025 INFO L482 AbstractCegarLoop]: Abstraction has 22923 states and 68931 transitions. [2021-06-05 15:51:08,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22923 states and 68931 transitions. [2021-06-05 15:51:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:08,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:08,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:08,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:08,248 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash 517704065, now seen corresponding path program 207 times [2021-06-05 15:51:08,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:08,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31831161] [2021-06-05 15:51:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:08,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:08,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31831161] [2021-06-05 15:51:08,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31831161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:08,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047099399] [2021-06-05 15:51:08,645 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:08,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:51:08,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:08,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:09,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 15:51:09,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:09,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:09,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:09,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:25 [2021-06-05 15:51:09,161 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:09,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:09,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:09,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:09,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:09,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:09,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047099399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:09,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:09,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 15:51:09,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112025045] [2021-06-05 15:51:09,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:51:09,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:51:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:51:09,306 INFO L87 Difference]: Start difference. First operand 22923 states and 68931 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:11,840 INFO L93 Difference]: Finished difference Result 24164 states and 72300 transitions. [2021-06-05 15:51:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:51:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:11,867 INFO L225 Difference]: With dead ends: 24164 [2021-06-05 15:51:11,867 INFO L226 Difference]: Without dead ends: 23826 [2021-06-05 15:51:11,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2147.1ms TimeCoverageRelationStatistics Valid=428, Invalid=5578, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:51:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23826 states. [2021-06-05 15:51:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23826 to 22879. [2021-06-05 15:51:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22879 states, 22878 states have (on average 3.008392341987936) internal successors, (68826), 22878 states have internal predecessors, (68826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22879 states to 22879 states and 68826 transitions. [2021-06-05 15:51:12,137 INFO L78 Accepts]: Start accepts. Automaton has 22879 states and 68826 transitions. Word has length 54 [2021-06-05 15:51:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:12,137 INFO L482 AbstractCegarLoop]: Abstraction has 22879 states and 68826 transitions. [2021-06-05 15:51:12,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 22879 states and 68826 transitions. [2021-06-05 15:51:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:12,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:12,159 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:12,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:12,359 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:12,359 INFO L82 PathProgramCache]: Analyzing trace with hash -385410807, now seen corresponding path program 208 times [2021-06-05 15:51:12,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:12,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742597790] [2021-06-05 15:51:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:12,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:12,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742597790] [2021-06-05 15:51:12,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742597790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:12,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409578766] [2021-06-05 15:51:12,771 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:12,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:51:12,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:12,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:12,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:13,037 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:13,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:51:13,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:13,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:13,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:13,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:51:13,175 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:13,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:13,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:13,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:13,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:13,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:13,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409578766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:13,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:13,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:13,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760924158] [2021-06-05 15:51:13,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:13,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:13,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:13,320 INFO L87 Difference]: Start difference. First operand 22879 states and 68826 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:15,454 INFO L93 Difference]: Finished difference Result 24097 states and 72135 transitions. [2021-06-05 15:51:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:51:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:15,484 INFO L225 Difference]: With dead ends: 24097 [2021-06-05 15:51:15,484 INFO L226 Difference]: Without dead ends: 23732 [2021-06-05 15:51:15,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1490.9ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:51:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23732 states. [2021-06-05 15:51:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23732 to 22843. [2021-06-05 15:51:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22843 states, 22842 states have (on average 3.009675159793363) internal successors, (68747), 22842 states have internal predecessors, (68747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22843 states to 22843 states and 68747 transitions. [2021-06-05 15:51:15,876 INFO L78 Accepts]: Start accepts. Automaton has 22843 states and 68747 transitions. Word has length 54 [2021-06-05 15:51:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:15,876 INFO L482 AbstractCegarLoop]: Abstraction has 22843 states and 68747 transitions. [2021-06-05 15:51:15,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 22843 states and 68747 transitions. [2021-06-05 15:51:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:15,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:15,898 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:16,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:16,099 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1690364315, now seen corresponding path program 209 times [2021-06-05 15:51:16,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:16,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318080048] [2021-06-05 15:51:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:16,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:16,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318080048] [2021-06-05 15:51:16,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318080048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:16,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248552858] [2021-06-05 15:51:16,468 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:16,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:51:16,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:16,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:51:16,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:16,741 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:16,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:51:16,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:16,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:16,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:16,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:51:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:16,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:16,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 15:51:16,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:16,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:16,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:16,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 15:51:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:17,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248552858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:17,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:17,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 15:51:17,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048628607] [2021-06-05 15:51:17,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:51:17,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:51:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:51:17,116 INFO L87 Difference]: Start difference. First operand 22843 states and 68747 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:19,376 INFO L93 Difference]: Finished difference Result 24093 states and 72124 transitions. [2021-06-05 15:51:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:51:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:19,405 INFO L225 Difference]: With dead ends: 24093 [2021-06-05 15:51:19,405 INFO L226 Difference]: Without dead ends: 23872 [2021-06-05 15:51:19,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1691.1ms TimeCoverageRelationStatistics Valid=309, Invalid=4247, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:51:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23872 states. [2021-06-05 15:51:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23872 to 23024. [2021-06-05 15:51:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23024 states, 23023 states have (on average 3.0053859184293965) internal successors, (69193), 23023 states have internal predecessors, (69193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23024 states to 23024 states and 69193 transitions. [2021-06-05 15:51:19,689 INFO L78 Accepts]: Start accepts. Automaton has 23024 states and 69193 transitions. Word has length 54 [2021-06-05 15:51:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:19,689 INFO L482 AbstractCegarLoop]: Abstraction has 23024 states and 69193 transitions. [2021-06-05 15:51:19,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23024 states and 69193 transitions. [2021-06-05 15:51:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:19,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:19,711 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:19,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 15:51:19,911 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2108887361, now seen corresponding path program 210 times [2021-06-05 15:51:19,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:19,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329747088] [2021-06-05 15:51:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:20,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:20,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329747088] [2021-06-05 15:51:20,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329747088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:20,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018048975] [2021-06-05 15:51:20,346 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:20,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:51:20,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:20,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 15:51:20,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:20,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:51:20,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:20,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 15:51:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,957 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 15:51:20,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 15:51:20,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:20,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2021-06-05 15:51:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:21,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018048975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:21,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:21,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 42 [2021-06-05 15:51:21,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623745947] [2021-06-05 15:51:21,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:51:21,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:51:21,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:51:21,248 INFO L87 Difference]: Start difference. First operand 23024 states and 69193 transitions. Second operand has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:25,186 INFO L93 Difference]: Finished difference Result 24516 states and 73171 transitions. [2021-06-05 15:51:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:51:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:25,216 INFO L225 Difference]: With dead ends: 24516 [2021-06-05 15:51:25,217 INFO L226 Difference]: Without dead ends: 23907 [2021-06-05 15:51:25,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 3264.1ms TimeCoverageRelationStatistics Valid=560, Invalid=8370, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 15:51:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23907 states. [2021-06-05 15:51:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23907 to 23007. [2021-06-05 15:51:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23007 states, 23006 states have (on average 3.005737633660784) internal successors, (69150), 23006 states have internal predecessors, (69150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23007 states to 23007 states and 69150 transitions. [2021-06-05 15:51:25,490 INFO L78 Accepts]: Start accepts. Automaton has 23007 states and 69150 transitions. Word has length 54 [2021-06-05 15:51:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:25,490 INFO L482 AbstractCegarLoop]: Abstraction has 23007 states and 69150 transitions. [2021-06-05 15:51:25,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 23007 states and 69150 transitions. [2021-06-05 15:51:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:25,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:25,511 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:25,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:25,711 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:25,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1907398291, now seen corresponding path program 211 times [2021-06-05 15:51:25,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:25,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290637139] [2021-06-05 15:51:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:26,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:26,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290637139] [2021-06-05 15:51:26,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290637139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:26,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047370455] [2021-06-05 15:51:26,041 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:51:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:26,305 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:26,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:51:26,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:26,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:26,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:26,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:25 [2021-06-05 15:51:26,445 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:26,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:51:26,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:26,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:26,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:26,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:51:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:26,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047370455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:26,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:26,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:51:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517838918] [2021-06-05 15:51:26,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:51:26,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:26,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:51:26,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:51:26,580 INFO L87 Difference]: Start difference. First operand 23007 states and 69150 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:28,552 INFO L93 Difference]: Finished difference Result 24268 states and 72546 transitions. [2021-06-05 15:51:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:51:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:28,583 INFO L225 Difference]: With dead ends: 24268 [2021-06-05 15:51:28,583 INFO L226 Difference]: Without dead ends: 24040 [2021-06-05 15:51:28,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1334.8ms TimeCoverageRelationStatistics Valid=251, Invalid=3289, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:51:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24040 states. [2021-06-05 15:51:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24040 to 22935. [2021-06-05 15:51:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22935 states, 22934 states have (on average 3.007586988750327) internal successors, (68976), 22934 states have internal predecessors, (68976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22935 states to 22935 states and 68976 transitions. [2021-06-05 15:51:28,925 INFO L78 Accepts]: Start accepts. Automaton has 22935 states and 68976 transitions. Word has length 54 [2021-06-05 15:51:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:28,925 INFO L482 AbstractCegarLoop]: Abstraction has 22935 states and 68976 transitions. [2021-06-05 15:51:28,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 22935 states and 68976 transitions. [2021-06-05 15:51:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:28,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:28,946 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:29,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 15:51:29,147 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -25591803, now seen corresponding path program 212 times [2021-06-05 15:51:29,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:29,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934912257] [2021-06-05 15:51:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:29,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934912257] [2021-06-05 15:51:29,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934912257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917244862] [2021-06-05 15:51:29,551 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:29,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:29,893 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:29,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:51:29,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:29,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:29,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:29,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:51:29,969 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:29,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:29,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:29,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:29,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:29,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917244862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:30,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:30,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285147718] [2021-06-05 15:51:30,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:30,113 INFO L87 Difference]: Start difference. First operand 22935 states and 68976 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:32,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:32,339 INFO L93 Difference]: Finished difference Result 24564 states and 73353 transitions. [2021-06-05 15:51:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:51:32,339 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:32,369 INFO L225 Difference]: With dead ends: 24564 [2021-06-05 15:51:32,369 INFO L226 Difference]: Without dead ends: 24178 [2021-06-05 15:51:32,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1458.7ms TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:51:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24178 states. [2021-06-05 15:51:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24178 to 23011. [2021-06-05 15:51:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23011 states, 23010 states have (on average 3.0066927422859626) internal successors, (69184), 23010 states have internal predecessors, (69184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23011 states to 23011 states and 69184 transitions. [2021-06-05 15:51:32,770 INFO L78 Accepts]: Start accepts. Automaton has 23011 states and 69184 transitions. Word has length 54 [2021-06-05 15:51:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:32,770 INFO L482 AbstractCegarLoop]: Abstraction has 23011 states and 69184 transitions. [2021-06-05 15:51:32,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23011 states and 69184 transitions. [2021-06-05 15:51:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:32,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:32,790 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:32,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 15:51:32,991 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:32,991 INFO L82 PathProgramCache]: Analyzing trace with hash -498752795, now seen corresponding path program 213 times [2021-06-05 15:51:32,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:32,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149991691] [2021-06-05 15:51:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:33,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:33,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149991691] [2021-06-05 15:51:33,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149991691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:33,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729547782] [2021-06-05 15:51:33,396 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:33,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:51:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:33,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:51:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:33,700 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:33,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:51:33,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:33,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:51:33,808 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:33,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:33,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:33,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:33,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729547782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:33,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:33,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:33,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80956992] [2021-06-05 15:51:33,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:33,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:33,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:33,953 INFO L87 Difference]: Start difference. First operand 23011 states and 69184 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:35,921 INFO L93 Difference]: Finished difference Result 24520 states and 73232 transitions. [2021-06-05 15:51:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:51:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:35,952 INFO L225 Difference]: With dead ends: 24520 [2021-06-05 15:51:35,952 INFO L226 Difference]: Without dead ends: 24182 [2021-06-05 15:51:35,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1450.1ms TimeCoverageRelationStatistics Valid=260, Invalid=3400, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:51:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24182 states. [2021-06-05 15:51:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24182 to 22995. [2021-06-05 15:51:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22995 states, 22994 states have (on average 3.0075671914412454) internal successors, (69156), 22994 states have internal predecessors, (69156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22995 states to 22995 states and 69156 transitions. [2021-06-05 15:51:36,236 INFO L78 Accepts]: Start accepts. Automaton has 22995 states and 69156 transitions. Word has length 54 [2021-06-05 15:51:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:36,236 INFO L482 AbstractCegarLoop]: Abstraction has 22995 states and 69156 transitions. [2021-06-05 15:51:36,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 22995 states and 69156 transitions. [2021-06-05 15:51:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:36,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:36,257 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:36,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:36,458 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:36,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:36,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1401867667, now seen corresponding path program 214 times [2021-06-05 15:51:36,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:36,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952648916] [2021-06-05 15:51:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:36,780 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-06-05 15:51:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:37,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952648916] [2021-06-05 15:51:37,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952648916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874549968] [2021-06-05 15:51:37,010 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:37,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:51:37,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:37,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:37,316 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:37,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:51:37,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:37,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:37,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:37,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:51:37,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:37,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:37,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:37,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:37,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:37,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:37,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874549968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:37,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:37,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:37,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505254382] [2021-06-05 15:51:37,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:37,574 INFO L87 Difference]: Start difference. First operand 22995 states and 69156 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:39,910 INFO L93 Difference]: Finished difference Result 24543 states and 73289 transitions. [2021-06-05 15:51:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:51:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:39,940 INFO L225 Difference]: With dead ends: 24543 [2021-06-05 15:51:39,940 INFO L226 Difference]: Without dead ends: 24162 [2021-06-05 15:51:39,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1652.5ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:51:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24162 states. [2021-06-05 15:51:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24162 to 22995. [2021-06-05 15:51:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22995 states, 22994 states have (on average 3.006871357745499) internal successors, (69140), 22994 states have internal predecessors, (69140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22995 states to 22995 states and 69140 transitions. [2021-06-05 15:51:40,218 INFO L78 Accepts]: Start accepts. Automaton has 22995 states and 69140 transitions. Word has length 54 [2021-06-05 15:51:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:40,218 INFO L482 AbstractCegarLoop]: Abstraction has 22995 states and 69140 transitions. [2021-06-05 15:51:40,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22995 states and 69140 transitions. [2021-06-05 15:51:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:40,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:40,239 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:40,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:40,439 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1690028495, now seen corresponding path program 215 times [2021-06-05 15:51:40,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:40,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261866513] [2021-06-05 15:51:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:40,663 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 15:51:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:40,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:40,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261866513] [2021-06-05 15:51:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261866513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:40,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49643014] [2021-06-05 15:51:40,957 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:40,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:51:40,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:51:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:41,225 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:41,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:51:41,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:41,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:41,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:41,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:51:41,364 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:41,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:41,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:41,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:41,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:41,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 15:51:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:41,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49643014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:41,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:41,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 15:51:41,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427615683] [2021-06-05 15:51:41,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:51:41,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:41,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:51:41,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:51:41,558 INFO L87 Difference]: Start difference. First operand 22995 states and 69140 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:43,764 INFO L93 Difference]: Finished difference Result 24612 states and 73461 transitions. [2021-06-05 15:51:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:51:43,764 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:43,794 INFO L225 Difference]: With dead ends: 24612 [2021-06-05 15:51:43,794 INFO L226 Difference]: Without dead ends: 24369 [2021-06-05 15:51:43,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1567.6ms TimeCoverageRelationStatistics Valid=285, Invalid=3621, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:51:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24369 states. [2021-06-05 15:51:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24369 to 23023. [2021-06-05 15:51:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23023 states, 23022 states have (on average 3.0063851967683086) internal successors, (69213), 23022 states have internal predecessors, (69213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23023 states to 23023 states and 69213 transitions. [2021-06-05 15:51:44,075 INFO L78 Accepts]: Start accepts. Automaton has 23023 states and 69213 transitions. Word has length 54 [2021-06-05 15:51:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:44,076 INFO L482 AbstractCegarLoop]: Abstraction has 23023 states and 69213 transitions. [2021-06-05 15:51:44,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 23023 states and 69213 transitions. [2021-06-05 15:51:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:44,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:44,098 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:44,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:44,298 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:44,298 INFO L82 PathProgramCache]: Analyzing trace with hash 970027177, now seen corresponding path program 216 times [2021-06-05 15:51:44,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:44,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598035488] [2021-06-05 15:51:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:44,420 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 15:51:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:44,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:44,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598035488] [2021-06-05 15:51:44,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598035488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:44,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415601286] [2021-06-05 15:51:44,766 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:44,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:51:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:45,028 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:45,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:51:45,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:45,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:45,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:45,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:51:45,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:45,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:45,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:45,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:45,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:45,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415601286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:45,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:45,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:51:45,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096372657] [2021-06-05 15:51:45,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:51:45,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:45,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:51:45,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:51:45,352 INFO L87 Difference]: Start difference. First operand 23023 states and 69213 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:47,505 INFO L93 Difference]: Finished difference Result 24507 states and 73192 transitions. [2021-06-05 15:51:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:51:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:47,537 INFO L225 Difference]: With dead ends: 24507 [2021-06-05 15:51:47,537 INFO L226 Difference]: Without dead ends: 24217 [2021-06-05 15:51:47,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1580.9ms TimeCoverageRelationStatistics Valid=293, Invalid=3739, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:51:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24217 states. [2021-06-05 15:51:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24217 to 22999. [2021-06-05 15:51:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22999 states, 22998 states have (on average 3.0068266805809203) internal successors, (69151), 22998 states have internal predecessors, (69151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22999 states to 22999 states and 69151 transitions. [2021-06-05 15:51:47,826 INFO L78 Accepts]: Start accepts. Automaton has 22999 states and 69151 transitions. Word has length 54 [2021-06-05 15:51:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:47,826 INFO L482 AbstractCegarLoop]: Abstraction has 22999 states and 69151 transitions. [2021-06-05 15:51:47,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22999 states and 69151 transitions. [2021-06-05 15:51:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:47,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:47,848 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:48,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:48,049 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash 786913623, now seen corresponding path program 217 times [2021-06-05 15:51:48,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:48,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256502878] [2021-06-05 15:51:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:48,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:48,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256502878] [2021-06-05 15:51:48,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256502878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:48,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76863543] [2021-06-05 15:51:48,513 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:48,777 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:48,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:51:48,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:48,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:48,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:48,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:51:48,914 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:48,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:48,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:48,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:48,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:48,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:49,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76863543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:49,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:49,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:49,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509886408] [2021-06-05 15:51:49,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:49,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:49,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:49,059 INFO L87 Difference]: Start difference. First operand 22999 states and 69151 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:51,052 INFO L93 Difference]: Finished difference Result 24527 states and 73245 transitions. [2021-06-05 15:51:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:51:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:51,082 INFO L225 Difference]: With dead ends: 24527 [2021-06-05 15:51:51,082 INFO L226 Difference]: Without dead ends: 24162 [2021-06-05 15:51:51,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1590.2ms TimeCoverageRelationStatistics Valid=278, Invalid=3628, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:51:51,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24162 states. [2021-06-05 15:51:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24162 to 22967. [2021-06-05 15:51:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22967 states, 22966 states have (on average 3.00788121571018) internal successors, (69079), 22966 states have internal predecessors, (69079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22967 states to 22967 states and 69079 transitions. [2021-06-05 15:51:51,362 INFO L78 Accepts]: Start accepts. Automaton has 22967 states and 69079 transitions. Word has length 54 [2021-06-05 15:51:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:51,363 INFO L482 AbstractCegarLoop]: Abstraction has 22967 states and 69079 transitions. [2021-06-05 15:51:51,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22967 states and 69079 transitions. [2021-06-05 15:51:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:51,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:51,384 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:51,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:51,585 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1432278551, now seen corresponding path program 218 times [2021-06-05 15:51:51,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:51,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201206401] [2021-06-05 15:51:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:51,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:51,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201206401] [2021-06-05 15:51:51,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201206401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:51,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990043638] [2021-06-05 15:51:51,949 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:51,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:51:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:52,309 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:52,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:51:52,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:52,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:52,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:52,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:51:52,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:52,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:52,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:52,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:52,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:52,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:52,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990043638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:52,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:52,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111840031] [2021-06-05 15:51:52,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:52,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:52,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:52,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:52,593 INFO L87 Difference]: Start difference. First operand 22967 states and 69079 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:54,996 INFO L93 Difference]: Finished difference Result 24875 states and 74108 transitions. [2021-06-05 15:51:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:51:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:55,027 INFO L225 Difference]: With dead ends: 24875 [2021-06-05 15:51:55,027 INFO L226 Difference]: Without dead ends: 24514 [2021-06-05 15:51:55,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1652.4ms TimeCoverageRelationStatistics Valid=285, Invalid=3875, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:51:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24514 states. [2021-06-05 15:51:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24514 to 22947. [2021-06-05 15:51:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22947 states, 22946 states have (on average 3.00810598797176) internal successors, (69024), 22946 states have internal predecessors, (69024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22947 states to 22947 states and 69024 transitions. [2021-06-05 15:51:55,309 INFO L78 Accepts]: Start accepts. Automaton has 22947 states and 69024 transitions. Word has length 54 [2021-06-05 15:51:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:55,309 INFO L482 AbstractCegarLoop]: Abstraction has 22947 states and 69024 transitions. [2021-06-05 15:51:55,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 22947 states and 69024 transitions. [2021-06-05 15:51:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:55,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:55,332 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:55,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:55,532 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash -503598263, now seen corresponding path program 219 times [2021-06-05 15:51:55,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:55,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916515034] [2021-06-05 15:51:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:55,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:55,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916515034] [2021-06-05 15:51:55,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916515034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:55,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795136124] [2021-06-05 15:51:55,946 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:56,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:51:56,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:51:56,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:56,376 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:56,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:51:56,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:56,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:56,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:56,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:51:56,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:51:56,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:51:56,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:56,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:56,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:56,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:51:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:51:56,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795136124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:56,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:56,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:51:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930793946] [2021-06-05 15:51:56,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:51:56,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:56,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:51:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:51:56,593 INFO L87 Difference]: Start difference. First operand 22947 states and 69024 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:58,789 INFO L93 Difference]: Finished difference Result 25381 states and 75827 transitions. [2021-06-05 15:51:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:51:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:51:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:58,823 INFO L225 Difference]: With dead ends: 25381 [2021-06-05 15:51:58,823 INFO L226 Difference]: Without dead ends: 24995 [2021-06-05 15:51:58,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1489.4ms TimeCoverageRelationStatistics Valid=260, Invalid=3400, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:51:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24995 states. [2021-06-05 15:51:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24995 to 22967. [2021-06-05 15:51:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22967 states, 22966 states have (on average 3.0074022467996167) internal successors, (69068), 22966 states have internal predecessors, (69068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22967 states to 22967 states and 69068 transitions. [2021-06-05 15:51:59,116 INFO L78 Accepts]: Start accepts. Automaton has 22967 states and 69068 transitions. Word has length 54 [2021-06-05 15:51:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:59,117 INFO L482 AbstractCegarLoop]: Abstraction has 22967 states and 69068 transitions. [2021-06-05 15:51:59,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 22967 states and 69068 transitions. [2021-06-05 15:51:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:51:59,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:59,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:59,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 15:51:59,341 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash -976759255, now seen corresponding path program 220 times [2021-06-05 15:51:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:59,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114980356] [2021-06-05 15:51:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:51:59,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:59,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114980356] [2021-06-05 15:51:59,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114980356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:59,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462940681] [2021-06-05 15:51:59,755 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:59,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:51:59,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:51:59,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:00,143 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:52:00,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:52:00,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:00,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:00,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:00,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:52:00,251 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:00,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:00,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:00,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:00,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:00,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:00,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462940681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:00,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:00,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:00,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021871801] [2021-06-05 15:52:00,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:00,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:00,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:00,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:00,396 INFO L87 Difference]: Start difference. First operand 22967 states and 69068 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:02,761 INFO L93 Difference]: Finished difference Result 25333 states and 75695 transitions. [2021-06-05 15:52:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:52:02,762 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:02,796 INFO L225 Difference]: With dead ends: 25333 [2021-06-05 15:52:02,796 INFO L226 Difference]: Without dead ends: 24995 [2021-06-05 15:52:02,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1470.8ms TimeCoverageRelationStatistics Valid=259, Invalid=3401, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:52:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24995 states. [2021-06-05 15:52:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24995 to 22951. [2021-06-05 15:52:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22951 states, 22950 states have (on average 3.0082788671023963) internal successors, (69040), 22950 states have internal predecessors, (69040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22951 states to 22951 states and 69040 transitions. [2021-06-05 15:52:03,081 INFO L78 Accepts]: Start accepts. Automaton has 22951 states and 69040 transitions. Word has length 54 [2021-06-05 15:52:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:03,081 INFO L482 AbstractCegarLoop]: Abstraction has 22951 states and 69040 transitions. [2021-06-05 15:52:03,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 22951 states and 69040 transitions. [2021-06-05 15:52:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:03,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:03,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:03,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 15:52:03,303 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1879874127, now seen corresponding path program 221 times [2021-06-05 15:52:03,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:03,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598084] [2021-06-05 15:52:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:03,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:03,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598084] [2021-06-05 15:52:03,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:03,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607710294] [2021-06-05 15:52:03,702 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:03,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:52:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:52:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:04,098 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:04,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:04,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:04,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:04,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:04,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:52:04,208 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:52:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:52:04,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:04,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:04,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:04,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:52:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:04,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607710294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:04,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:04,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:04,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143866896] [2021-06-05 15:52:04,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:04,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:04,353 INFO L87 Difference]: Start difference. First operand 22951 states and 69040 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:06,516 INFO L93 Difference]: Finished difference Result 25321 states and 75662 transitions. [2021-06-05 15:52:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:52:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:06,550 INFO L225 Difference]: With dead ends: 25321 [2021-06-05 15:52:06,550 INFO L226 Difference]: Without dead ends: 24940 [2021-06-05 15:52:06,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1596.2ms TimeCoverageRelationStatistics Valid=260, Invalid=3522, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:52:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2021-06-05 15:52:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 22951. [2021-06-05 15:52:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22951 states, 22950 states have (on average 3.0081045751633986) internal successors, (69036), 22950 states have internal predecessors, (69036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22951 states to 22951 states and 69036 transitions. [2021-06-05 15:52:06,844 INFO L78 Accepts]: Start accepts. Automaton has 22951 states and 69036 transitions. Word has length 54 [2021-06-05 15:52:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:06,844 INFO L482 AbstractCegarLoop]: Abstraction has 22951 states and 69036 transitions. [2021-06-05 15:52:06,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 22951 states and 69036 transitions. [2021-06-05 15:52:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:06,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:06,866 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:07,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 15:52:07,066 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1306167781, now seen corresponding path program 222 times [2021-06-05 15:52:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:07,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667910351] [2021-06-05 15:52:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:07,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667910351] [2021-06-05 15:52:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667910351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308960416] [2021-06-05 15:52:07,483 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:07,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:52:07,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:52:07,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:07,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:07,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:07,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:07,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:07,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:07,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:52:08,003 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:08,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:08,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:08,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:08,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:08,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308960416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:08,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:08,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015603603] [2021-06-05 15:52:08,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:08,154 INFO L87 Difference]: Start difference. First operand 22951 states and 69036 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:10,410 INFO L93 Difference]: Finished difference Result 26294 states and 78523 transitions. [2021-06-05 15:52:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:52:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:10,444 INFO L225 Difference]: With dead ends: 26294 [2021-06-05 15:52:10,444 INFO L226 Difference]: Without dead ends: 25908 [2021-06-05 15:52:10,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1624.9ms TimeCoverageRelationStatistics Valid=258, Invalid=3402, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:52:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25908 states. [2021-06-05 15:52:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25908 to 22963. [2021-06-05 15:52:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22963 states, 22962 states have (on average 3.0079261388380805) internal successors, (69068), 22962 states have internal predecessors, (69068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22963 states to 22963 states and 69068 transitions. [2021-06-05 15:52:10,726 INFO L78 Accepts]: Start accepts. Automaton has 22963 states and 69068 transitions. Word has length 54 [2021-06-05 15:52:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:10,726 INFO L482 AbstractCegarLoop]: Abstraction has 22963 states and 69068 transitions. [2021-06-05 15:52:10,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 22963 states and 69068 transitions. [2021-06-05 15:52:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:10,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:10,747 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:10,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:10,947 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1205903543, now seen corresponding path program 223 times [2021-06-05 15:52:10,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:10,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689142560] [2021-06-05 15:52:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:11,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689142560] [2021-06-05 15:52:11,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689142560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521694200] [2021-06-05 15:52:11,355 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:11,658 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:11,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:11,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:11,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:11,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:11,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:52:11,851 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:11,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:11,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:11,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:11,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:11,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:11,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521694200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:11,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:11,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:11,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182956880] [2021-06-05 15:52:11,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:11,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:11,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:11,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:11,996 INFO L87 Difference]: Start difference. First operand 22963 states and 69068 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:14,657 INFO L93 Difference]: Finished difference Result 26334 states and 78626 transitions. [2021-06-05 15:52:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:52:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:14,693 INFO L225 Difference]: With dead ends: 26334 [2021-06-05 15:52:14,693 INFO L226 Difference]: Without dead ends: 25957 [2021-06-05 15:52:14,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1874.2ms TimeCoverageRelationStatistics Valid=329, Invalid=4927, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:52:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25957 states. [2021-06-05 15:52:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25957 to 22966. [2021-06-05 15:52:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22966 states, 22965 states have (on average 3.007881558893969) internal successors, (69076), 22965 states have internal predecessors, (69076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22966 states to 22966 states and 69076 transitions. [2021-06-05 15:52:14,981 INFO L78 Accepts]: Start accepts. Automaton has 22966 states and 69076 transitions. Word has length 54 [2021-06-05 15:52:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:14,981 INFO L482 AbstractCegarLoop]: Abstraction has 22966 states and 69076 transitions. [2021-06-05 15:52:14,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 22966 states and 69076 transitions. [2021-06-05 15:52:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:15,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:15,002 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:15,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:15,202 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2019713203, now seen corresponding path program 224 times [2021-06-05 15:52:15,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:15,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810347139] [2021-06-05 15:52:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:15,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:15,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810347139] [2021-06-05 15:52:15,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810347139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:15,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448761202] [2021-06-05 15:52:15,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:15,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:52:15,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:15,987 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:52:15,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:52:15,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:15,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:15,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:15,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:52:16,091 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:16,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:16,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:16,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448761202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:16,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:16,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:16,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078556890] [2021-06-05 15:52:16,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:16,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:16,240 INFO L87 Difference]: Start difference. First operand 22966 states and 69076 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:19,137 INFO L93 Difference]: Finished difference Result 26790 states and 79883 transitions. [2021-06-05 15:52:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:52:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:19,174 INFO L225 Difference]: With dead ends: 26790 [2021-06-05 15:52:19,174 INFO L226 Difference]: Without dead ends: 26429 [2021-06-05 15:52:19,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1979.8ms TimeCoverageRelationStatistics Valid=350, Invalid=5350, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:52:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26429 states. [2021-06-05 15:52:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26429 to 22978. [2021-06-05 15:52:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 22977 states have (on average 3.0077468773120946) internal successors, (69109), 22977 states have internal predecessors, (69109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 69109 transitions. [2021-06-05 15:52:19,470 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 69109 transitions. Word has length 54 [2021-06-05 15:52:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:19,470 INFO L482 AbstractCegarLoop]: Abstraction has 22978 states and 69109 transitions. [2021-06-05 15:52:19,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 69109 transitions. [2021-06-05 15:52:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:19,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:19,491 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:19,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 15:52:19,692 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash -529797239, now seen corresponding path program 225 times [2021-06-05 15:52:19,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:19,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029455713] [2021-06-05 15:52:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:20,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:20,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029455713] [2021-06-05 15:52:20,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029455713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:20,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511991419] [2021-06-05 15:52:20,182 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:20,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:52:20,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:20,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:52:20,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:20,488 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:20,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:20,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:20,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:20,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:20,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:52:20,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:52:20,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:20,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:20,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:20,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:20,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:20,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 15:52:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:20,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511991419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:20,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:20,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:20,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946058304] [2021-06-05 15:52:20,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:20,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:20,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:20,764 INFO L87 Difference]: Start difference. First operand 22978 states and 69109 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:24,100 INFO L93 Difference]: Finished difference Result 28278 states and 84385 transitions. [2021-06-05 15:52:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:52:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:24,138 INFO L225 Difference]: With dead ends: 28278 [2021-06-05 15:52:24,138 INFO L226 Difference]: Without dead ends: 28057 [2021-06-05 15:52:24,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 2082.2ms TimeCoverageRelationStatistics Valid=362, Invalid=5188, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:52:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-06-05 15:52:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 22982. [2021-06-05 15:52:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22982 states, 22981 states have (on average 3.007702014707802) internal successors, (69120), 22981 states have internal predecessors, (69120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22982 states to 22982 states and 69120 transitions. [2021-06-05 15:52:24,484 INFO L78 Accepts]: Start accepts. Automaton has 22982 states and 69120 transitions. Word has length 54 [2021-06-05 15:52:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:24,484 INFO L482 AbstractCegarLoop]: Abstraction has 22982 states and 69120 transitions. [2021-06-05 15:52:24,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 22982 states and 69120 transitions. [2021-06-05 15:52:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:24,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:24,504 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:24,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:24,705 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1064302957, now seen corresponding path program 226 times [2021-06-05 15:52:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:24,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011574826] [2021-06-05 15:52:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:25,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:25,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011574826] [2021-06-05 15:52:25,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011574826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:25,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520040420] [2021-06-05 15:52:25,108 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:25,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:52:25,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:25,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:25,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:25,409 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:25,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:25,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:25,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:25,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:25,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:52:25,482 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:25,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:25,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:25,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:25,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:25,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520040420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:25,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:25,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:25,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199618895] [2021-06-05 15:52:25,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:25,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:25,657 INFO L87 Difference]: Start difference. First operand 22982 states and 69120 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:28,820 INFO L93 Difference]: Finished difference Result 30436 states and 90583 transitions. [2021-06-05 15:52:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:52:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:28,859 INFO L225 Difference]: With dead ends: 30436 [2021-06-05 15:52:28,859 INFO L226 Difference]: Without dead ends: 30250 [2021-06-05 15:52:28,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1877.3ms TimeCoverageRelationStatistics Valid=356, Invalid=5344, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:52:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30250 states. [2021-06-05 15:52:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30250 to 22951. [2021-06-05 15:52:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22951 states, 22950 states have (on average 3.0081045751633986) internal successors, (69036), 22950 states have internal predecessors, (69036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22951 states to 22951 states and 69036 transitions. [2021-06-05 15:52:29,164 INFO L78 Accepts]: Start accepts. Automaton has 22951 states and 69036 transitions. Word has length 54 [2021-06-05 15:52:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:29,164 INFO L482 AbstractCegarLoop]: Abstraction has 22951 states and 69036 transitions. [2021-06-05 15:52:29,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22951 states and 69036 transitions. [2021-06-05 15:52:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:29,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:29,188 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:29,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:29,388 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1408709609, now seen corresponding path program 227 times [2021-06-05 15:52:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621115506] [2021-06-05 15:52:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:29,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:29,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621115506] [2021-06-05 15:52:29,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621115506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:29,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212107891] [2021-06-05 15:52:29,801 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:29,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:52:29,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:29,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 15:52:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:30,138 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:30,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:30,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:30,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:30,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:30,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:52:30,280 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:30,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:30,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:30,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:30,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:30,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:30,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212107891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:30,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:30,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 15:52:30,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022127360] [2021-06-05 15:52:30,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:52:30,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:30,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:52:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:52:30,423 INFO L87 Difference]: Start difference. First operand 22951 states and 69036 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:33,402 INFO L93 Difference]: Finished difference Result 26234 states and 78049 transitions. [2021-06-05 15:52:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:52:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:33,439 INFO L225 Difference]: With dead ends: 26234 [2021-06-05 15:52:33,439 INFO L226 Difference]: Without dead ends: 25710 [2021-06-05 15:52:33,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2135.5ms TimeCoverageRelationStatistics Valid=422, Invalid=5898, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:52:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25710 states. [2021-06-05 15:52:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25710 to 22993. [2021-06-05 15:52:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22993 states, 22992 states have (on average 3.00839422407794) internal successors, (69169), 22992 states have internal predecessors, (69169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22993 states to 22993 states and 69169 transitions. [2021-06-05 15:52:33,738 INFO L78 Accepts]: Start accepts. Automaton has 22993 states and 69169 transitions. Word has length 54 [2021-06-05 15:52:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:33,738 INFO L482 AbstractCegarLoop]: Abstraction has 22993 states and 69169 transitions. [2021-06-05 15:52:33,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 22993 states and 69169 transitions. [2021-06-05 15:52:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:33,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:33,760 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:33,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:33,961 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash 659500431, now seen corresponding path program 228 times [2021-06-05 15:52:33,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:33,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497285288] [2021-06-05 15:52:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:34,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497285288] [2021-06-05 15:52:34,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497285288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:34,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320206127] [2021-06-05 15:52:34,352 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:34,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:52:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:34,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:52:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:34,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 15:52:34,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:34,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:34,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:34,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:30 [2021-06-05 15:52:34,817 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:34,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:34,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:34,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:34,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:34,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:34,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320206127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:34,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:34,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 38 [2021-06-05 15:52:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466047052] [2021-06-05 15:52:34,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:52:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:52:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:52:34,963 INFO L87 Difference]: Start difference. First operand 22993 states and 69169 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:38,982 INFO L93 Difference]: Finished difference Result 26221 states and 77998 transitions. [2021-06-05 15:52:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:52:38,983 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:39,019 INFO L225 Difference]: With dead ends: 26221 [2021-06-05 15:52:39,019 INFO L226 Difference]: Without dead ends: 25840 [2021-06-05 15:52:39,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2664.3ms TimeCoverageRelationStatistics Valid=521, Invalid=7489, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:52:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25840 states. [2021-06-05 15:52:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25840 to 23040. [2021-06-05 15:52:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23040 states, 23039 states have (on average 3.0085507183471503) internal successors, (69314), 23039 states have internal predecessors, (69314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23040 states to 23040 states and 69314 transitions. [2021-06-05 15:52:39,306 INFO L78 Accepts]: Start accepts. Automaton has 23040 states and 69314 transitions. Word has length 54 [2021-06-05 15:52:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:39,307 INFO L482 AbstractCegarLoop]: Abstraction has 23040 states and 69314 transitions. [2021-06-05 15:52:39,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23040 states and 69314 transitions. [2021-06-05 15:52:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:39,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:39,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:39,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:39,529 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash -265072461, now seen corresponding path program 229 times [2021-06-05 15:52:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:39,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837347264] [2021-06-05 15:52:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:39,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:39,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837347264] [2021-06-05 15:52:39,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837347264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:39,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103156353] [2021-06-05 15:52:39,944 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:40,209 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:40,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:40,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:40,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:40,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:40,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:52:40,351 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:40,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:40,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:40,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:40,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:40,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:40,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103156353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:40,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:40,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775367541] [2021-06-05 15:52:40,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:40,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:40,497 INFO L87 Difference]: Start difference. First operand 23040 states and 69314 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:42,520 INFO L93 Difference]: Finished difference Result 26199 states and 78252 transitions. [2021-06-05 15:52:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:52:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:42,554 INFO L225 Difference]: With dead ends: 26199 [2021-06-05 15:52:42,554 INFO L226 Difference]: Without dead ends: 25749 [2021-06-05 15:52:42,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1515.3ms TimeCoverageRelationStatistics Valid=263, Invalid=3519, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:52:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25749 states. [2021-06-05 15:52:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25749 to 23002. [2021-06-05 15:52:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23002 states, 23001 states have (on average 3.008434415894961) internal successors, (69197), 23001 states have internal predecessors, (69197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23002 states to 23002 states and 69197 transitions. [2021-06-05 15:52:42,841 INFO L78 Accepts]: Start accepts. Automaton has 23002 states and 69197 transitions. Word has length 54 [2021-06-05 15:52:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:42,841 INFO L482 AbstractCegarLoop]: Abstraction has 23002 states and 69197 transitions. [2021-06-05 15:52:42,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23002 states and 69197 transitions. [2021-06-05 15:52:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:42,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:42,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:43,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 15:52:43,065 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2075956557, now seen corresponding path program 230 times [2021-06-05 15:52:43,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:43,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915815005] [2021-06-05 15:52:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:43,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915815005] [2021-06-05 15:52:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915815005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016335238] [2021-06-05 15:52:43,465 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:43,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:52:43,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:43,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:43,734 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:52:43,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:52:43,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:43,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:43,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:43,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:52:43,874 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:43,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:43,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:43,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:43,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:43,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:44,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016335238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:44,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:44,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:44,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62911090] [2021-06-05 15:52:44,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:44,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:44,022 INFO L87 Difference]: Start difference. First operand 23002 states and 69197 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:46,475 INFO L93 Difference]: Finished difference Result 26589 states and 79337 transitions. [2021-06-05 15:52:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:52:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:46,511 INFO L225 Difference]: With dead ends: 26589 [2021-06-05 15:52:46,511 INFO L226 Difference]: Without dead ends: 26228 [2021-06-05 15:52:46,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1568.4ms TimeCoverageRelationStatistics Valid=273, Invalid=3887, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:52:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26228 states. [2021-06-05 15:52:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26228 to 23014. [2021-06-05 15:52:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23014 states, 23013 states have (on average 3.0082996567157694) internal successors, (69230), 23013 states have internal predecessors, (69230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23014 states to 23014 states and 69230 transitions. [2021-06-05 15:52:46,803 INFO L78 Accepts]: Start accepts. Automaton has 23014 states and 69230 transitions. Word has length 54 [2021-06-05 15:52:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:46,803 INFO L482 AbstractCegarLoop]: Abstraction has 23014 states and 69230 transitions. [2021-06-05 15:52:46,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 23014 states and 69230 transitions. [2021-06-05 15:52:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:46,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:46,824 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:47,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 15:52:47,025 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash -586040593, now seen corresponding path program 231 times [2021-06-05 15:52:47,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:47,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567387369] [2021-06-05 15:52:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:47,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:47,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567387369] [2021-06-05 15:52:47,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567387369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:47,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962081281] [2021-06-05 15:52:47,425 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:47,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:52:47,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:47,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:47,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:47,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:47,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:47,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:47,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:47,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:47,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:52:47,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:52:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:47,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 15:52:47,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:47,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:47,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:47,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:13 [2021-06-05 15:52:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:47,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962081281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:47,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:47,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:47,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999343804] [2021-06-05 15:52:47,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:47,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:47,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:47,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:47,991 INFO L87 Difference]: Start difference. First operand 23014 states and 69230 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:50,783 INFO L93 Difference]: Finished difference Result 27799 states and 82892 transitions. [2021-06-05 15:52:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:52:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:50,820 INFO L225 Difference]: With dead ends: 27799 [2021-06-05 15:52:50,820 INFO L226 Difference]: Without dead ends: 27578 [2021-06-05 15:52:50,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1618.0ms TimeCoverageRelationStatistics Valid=279, Invalid=3627, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:52:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27578 states. [2021-06-05 15:52:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27578 to 23018. [2021-06-05 15:52:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23018 states, 23017 states have (on average 3.0082547682147975) internal successors, (69241), 23017 states have internal predecessors, (69241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23018 states to 23018 states and 69241 transitions. [2021-06-05 15:52:51,113 INFO L78 Accepts]: Start accepts. Automaton has 23018 states and 69241 transitions. Word has length 54 [2021-06-05 15:52:51,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:51,113 INFO L482 AbstractCegarLoop]: Abstraction has 23018 states and 69241 transitions. [2021-06-05 15:52:51,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 23018 states and 69241 transitions. [2021-06-05 15:52:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:51,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:51,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:51,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 15:52:51,334 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1008059603, now seen corresponding path program 232 times [2021-06-05 15:52:51,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:51,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568859357] [2021-06-05 15:52:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:51,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:51,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568859357] [2021-06-05 15:52:51,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568859357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:51,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605559036] [2021-06-05 15:52:51,733 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:51,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:52:51,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:52:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:51,997 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:51,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:52:51,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:52,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:52,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:52,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:52:52,104 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:52,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:52:52,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:52,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:52,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:52,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:52:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:52,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605559036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:52,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:52,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:52,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476880078] [2021-06-05 15:52:52,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:52,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:52,276 INFO L87 Difference]: Start difference. First operand 23018 states and 69241 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:54,496 INFO L93 Difference]: Finished difference Result 29986 states and 89112 transitions. [2021-06-05 15:52:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:52:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:54,536 INFO L225 Difference]: With dead ends: 29986 [2021-06-05 15:52:54,536 INFO L226 Difference]: Without dead ends: 29800 [2021-06-05 15:52:54,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1485.4ms TimeCoverageRelationStatistics Valid=266, Invalid=3640, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:52:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29800 states. [2021-06-05 15:52:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29800 to 22994. [2021-06-05 15:52:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22994 states, 22993 states have (on average 3.00848084199539) internal successors, (69174), 22993 states have internal predecessors, (69174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22994 states to 22994 states and 69174 transitions. [2021-06-05 15:52:54,848 INFO L78 Accepts]: Start accepts. Automaton has 22994 states and 69174 transitions. Word has length 54 [2021-06-05 15:52:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:54,848 INFO L482 AbstractCegarLoop]: Abstraction has 22994 states and 69174 transitions. [2021-06-05 15:52:54,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 22994 states and 69174 transitions. [2021-06-05 15:52:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:54,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:54,869 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:55,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 15:52:55,070 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1765883997, now seen corresponding path program 233 times [2021-06-05 15:52:55,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:55,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194885057] [2021-06-05 15:52:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:52:55,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:55,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194885057] [2021-06-05 15:52:55,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194885057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:55,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798655154] [2021-06-05 15:52:55,451 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:55,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:52:55,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:52:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:55,736 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:52:55,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:52:55,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:55,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:55,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:52:55,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-06-05 15:52:55,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:52:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:55,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:52:55,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:55,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:55,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:55,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:13 [2021-06-05 15:52:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:52:56,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798655154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:56,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:56,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:52:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736971534] [2021-06-05 15:52:56,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:52:56,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:52:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:52:56,118 INFO L87 Difference]: Start difference. First operand 22994 states and 69174 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:59,049 INFO L93 Difference]: Finished difference Result 25441 states and 76030 transitions. [2021-06-05 15:52:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:52:59,049 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:52:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:59,082 INFO L225 Difference]: With dead ends: 25441 [2021-06-05 15:52:59,082 INFO L226 Difference]: Without dead ends: 25220 [2021-06-05 15:52:59,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1766.0ms TimeCoverageRelationStatistics Valid=276, Invalid=3756, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:52:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25220 states. [2021-06-05 15:52:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25220 to 23079. [2021-06-05 15:52:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23079 states, 23078 states have (on average 3.006716353236849) internal successors, (69389), 23078 states have internal predecessors, (69389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23079 states to 23079 states and 69389 transitions. [2021-06-05 15:52:59,377 INFO L78 Accepts]: Start accepts. Automaton has 23079 states and 69389 transitions. Word has length 54 [2021-06-05 15:52:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:59,377 INFO L482 AbstractCegarLoop]: Abstraction has 23079 states and 69389 transitions. [2021-06-05 15:52:59,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 23079 states and 69389 transitions. [2021-06-05 15:52:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:52:59,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:59,399 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:59,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:59,599 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash 816551069, now seen corresponding path program 234 times [2021-06-05 15:52:59,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:59,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757772209] [2021-06-05 15:52:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:59,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757772209] [2021-06-05 15:52:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757772209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530178306] [2021-06-05 15:52:59,950 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:59,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:52:59,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:59,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:52:59,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:00,211 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:00,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:53:00,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:00,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:00,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:00,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:53:00,358 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:00,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:00,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:00,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:00,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:00,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530178306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:00,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:00,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:53:00,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003525439] [2021-06-05 15:53:00,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:00,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:00,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:00,492 INFO L87 Difference]: Start difference. First operand 23079 states and 69389 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:02,525 INFO L93 Difference]: Finished difference Result 25420 states and 75977 transitions. [2021-06-05 15:53:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:53:02,525 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:02,557 INFO L225 Difference]: With dead ends: 25420 [2021-06-05 15:53:02,558 INFO L226 Difference]: Without dead ends: 25135 [2021-06-05 15:53:02,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1396.4ms TimeCoverageRelationStatistics Valid=249, Invalid=3291, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:53:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25135 states. [2021-06-05 15:53:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25135 to 23003. [2021-06-05 15:53:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23003 states, 23002 states have (on average 3.008434049213112) internal successors, (69200), 23002 states have internal predecessors, (69200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23003 states to 23003 states and 69200 transitions. [2021-06-05 15:53:02,839 INFO L78 Accepts]: Start accepts. Automaton has 23003 states and 69200 transitions. Word has length 54 [2021-06-05 15:53:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:02,839 INFO L482 AbstractCegarLoop]: Abstraction has 23003 states and 69200 transitions. [2021-06-05 15:53:02,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 23003 states and 69200 transitions. [2021-06-05 15:53:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:02,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:02,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:03,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:03,060 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash 832944193, now seen corresponding path program 235 times [2021-06-05 15:53:03,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:03,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655261187] [2021-06-05 15:53:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:03,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:03,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655261187] [2021-06-05 15:53:03,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655261187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:03,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109852333] [2021-06-05 15:53:03,450 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:03,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:03,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:03,715 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:03,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:53:03,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:03,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:03,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:03,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:53:03,864 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:53:03,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:53:03,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:03,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:03,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:03,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:53:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:04,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109852333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:04,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:04,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:53:04,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416385151] [2021-06-05 15:53:04,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:04,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:04,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:04,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:04,013 INFO L87 Difference]: Start difference. First operand 23003 states and 69200 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:06,283 INFO L93 Difference]: Finished difference Result 26566 states and 79271 transitions. [2021-06-05 15:53:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:53:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:06,320 INFO L225 Difference]: With dead ends: 26566 [2021-06-05 15:53:06,320 INFO L226 Difference]: Without dead ends: 26240 [2021-06-05 15:53:06,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1582.5ms TimeCoverageRelationStatistics Valid=263, Invalid=3643, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:53:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2021-06-05 15:53:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23015. [2021-06-05 15:53:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23015 states, 23014 states have (on average 3.0082992960806467) internal successors, (69233), 23014 states have internal predecessors, (69233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23015 states to 23015 states and 69233 transitions. [2021-06-05 15:53:06,618 INFO L78 Accepts]: Start accepts. Automaton has 23015 states and 69233 transitions. Word has length 54 [2021-06-05 15:53:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:06,618 INFO L482 AbstractCegarLoop]: Abstraction has 23015 states and 69233 transitions. [2021-06-05 15:53:06,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 23015 states and 69233 transitions. [2021-06-05 15:53:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:06,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:06,640 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:06,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-05 15:53:06,843 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash -2141567369, now seen corresponding path program 236 times [2021-06-05 15:53:06,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:06,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474977127] [2021-06-05 15:53:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:07,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474977127] [2021-06-05 15:53:07,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474977127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902283489] [2021-06-05 15:53:07,222 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:07,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:53:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:07,485 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:53:07,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:53:07,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:07,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:07,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:07,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 15:53:07,593 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:07,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:07,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:07,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:07,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:07,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:07,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902283489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:07,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:07,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:53:07,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125927690] [2021-06-05 15:53:07,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:07,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:07,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:07,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:07,771 INFO L87 Difference]: Start difference. First operand 23015 states and 69233 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:10,147 INFO L93 Difference]: Finished difference Result 28565 states and 85049 transitions. [2021-06-05 15:53:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:53:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:10,187 INFO L225 Difference]: With dead ends: 28565 [2021-06-05 15:53:10,187 INFO L226 Difference]: Without dead ends: 28344 [2021-06-05 15:53:10,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1548.7ms TimeCoverageRelationStatistics Valid=261, Invalid=3645, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:53:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28344 states. [2021-06-05 15:53:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28344 to 23019. [2021-06-05 15:53:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23019 states, 23018 states have (on average 3.008254409592493) internal successors, (69244), 23018 states have internal predecessors, (69244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23019 states to 23019 states and 69244 transitions. [2021-06-05 15:53:10,489 INFO L78 Accepts]: Start accepts. Automaton has 23019 states and 69244 transitions. Word has length 54 [2021-06-05 15:53:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:10,489 INFO L482 AbstractCegarLoop]: Abstraction has 23019 states and 69244 transitions. [2021-06-05 15:53:10,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 23019 states and 69244 transitions. [2021-06-05 15:53:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:10,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:10,511 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:10,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:10,711 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash -547467173, now seen corresponding path program 237 times [2021-06-05 15:53:10,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:10,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853074133] [2021-06-05 15:53:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:11,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:11,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853074133] [2021-06-05 15:53:11,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853074133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:11,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785119366] [2021-06-05 15:53:11,089 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:11,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:53:11,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:11,352 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:11,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:53:11,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:11,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:11,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:11,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 15:53:11,460 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:11,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:11,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:11,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:11,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:11,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:11,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785119366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:11,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:11,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:53:11,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567541340] [2021-06-05 15:53:11,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:11,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:11,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:11,637 INFO L87 Difference]: Start difference. First operand 23019 states and 69244 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:14,518 INFO L93 Difference]: Finished difference Result 30257 states and 89852 transitions. [2021-06-05 15:53:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:53:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:14,559 INFO L225 Difference]: With dead ends: 30257 [2021-06-05 15:53:14,559 INFO L226 Difference]: Without dead ends: 30071 [2021-06-05 15:53:14,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1510.9ms TimeCoverageRelationStatistics Valid=266, Invalid=3766, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:53:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30071 states. [2021-06-05 15:53:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30071 to 22994. [2021-06-05 15:53:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22994 states, 22993 states have (on average 3.00848084199539) internal successors, (69174), 22993 states have internal predecessors, (69174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22994 states to 22994 states and 69174 transitions. [2021-06-05 15:53:14,871 INFO L78 Accepts]: Start accepts. Automaton has 22994 states and 69174 transitions. Word has length 54 [2021-06-05 15:53:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:14,871 INFO L482 AbstractCegarLoop]: Abstraction has 22994 states and 69174 transitions. [2021-06-05 15:53:14,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 22994 states and 69174 transitions. [2021-06-05 15:53:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:14,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:14,892 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:15,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:15,093 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2005843565, now seen corresponding path program 238 times [2021-06-05 15:53:15,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:15,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137225321] [2021-06-05 15:53:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:15,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:15,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137225321] [2021-06-05 15:53:15,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137225321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:15,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319829700] [2021-06-05 15:53:15,485 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:15,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:53:15,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:15,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:15,730 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:15,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:53:15,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:15,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:15,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:15,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:53:15,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:15,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:15,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:15,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:15,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:15,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:16,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319829700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:16,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:16,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:53:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677633002] [2021-06-05 15:53:16,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:16,041 INFO L87 Difference]: Start difference. First operand 22994 states and 69174 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:18,090 INFO L93 Difference]: Finished difference Result 25679 states and 76627 transitions. [2021-06-05 15:53:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:53:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:18,124 INFO L225 Difference]: With dead ends: 25679 [2021-06-05 15:53:18,124 INFO L226 Difference]: Without dead ends: 25341 [2021-06-05 15:53:18,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1616.8ms TimeCoverageRelationStatistics Valid=303, Invalid=3857, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:53:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25341 states. [2021-06-05 15:53:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25341 to 23001. [2021-06-05 15:53:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23001 states, 23000 states have (on average 3.0085652173913044) internal successors, (69197), 23000 states have internal predecessors, (69197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23001 states to 23001 states and 69197 transitions. [2021-06-05 15:53:18,418 INFO L78 Accepts]: Start accepts. Automaton has 23001 states and 69197 transitions. Word has length 54 [2021-06-05 15:53:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:18,418 INFO L482 AbstractCegarLoop]: Abstraction has 23001 states and 69197 transitions. [2021-06-05 15:53:18,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 23001 states and 69197 transitions. [2021-06-05 15:53:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:18,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:18,440 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:18,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:18,641 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash -220913691, now seen corresponding path program 239 times [2021-06-05 15:53:18,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:18,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999930570] [2021-06-05 15:53:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:19,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:19,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999930570] [2021-06-05 15:53:19,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999930570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:19,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127177530] [2021-06-05 15:53:19,016 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:19,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:53:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:19,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:19,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-05 15:53:19,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:19,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:19,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:19,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:23 [2021-06-05 15:53:19,602 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:53:19,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:53:19,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:19,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:19,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:19,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 15:53:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:19,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127177530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:19,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:19,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-06-05 15:53:19,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571206228] [2021-06-05 15:53:19,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:53:19,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:19,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:53:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:53:19,815 INFO L87 Difference]: Start difference. First operand 23001 states and 69197 transitions. Second operand has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:25,085 INFO L93 Difference]: Finished difference Result 27259 states and 80996 transitions. [2021-06-05 15:53:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 15:53:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:25,122 INFO L225 Difference]: With dead ends: 27259 [2021-06-05 15:53:25,122 INFO L226 Difference]: Without dead ends: 27016 [2021-06-05 15:53:25,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 3977.7ms TimeCoverageRelationStatistics Valid=915, Invalid=13127, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 15:53:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27016 states. [2021-06-05 15:53:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27016 to 23095. [2021-06-05 15:53:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23095 states, 23094 states have (on average 3.007058110331688) internal successors, (69445), 23094 states have internal predecessors, (69445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23095 states to 23095 states and 69445 transitions. [2021-06-05 15:53:25,421 INFO L78 Accepts]: Start accepts. Automaton has 23095 states and 69445 transitions. Word has length 54 [2021-06-05 15:53:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:25,421 INFO L482 AbstractCegarLoop]: Abstraction has 23095 states and 69445 transitions. [2021-06-05 15:53:25,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 23095 states and 69445 transitions. [2021-06-05 15:53:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:25,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:25,442 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:25,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:25,643 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:25,643 INFO L82 PathProgramCache]: Analyzing trace with hash -777240315, now seen corresponding path program 240 times [2021-06-05 15:53:25,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:25,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328583739] [2021-06-05 15:53:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:25,907 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-06-05 15:53:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:26,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:26,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328583739] [2021-06-05 15:53:26,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328583739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:26,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783277692] [2021-06-05 15:53:26,077 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:26,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:53:26,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:26,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:53:26,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:26,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:26,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:53:26,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:26,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:26,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:26,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:53:26,470 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:26,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:26,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:26,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:26,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:26,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:26,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783277692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:26,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:26,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 15:53:26,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666910940] [2021-06-05 15:53:26,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:53:26,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:53:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:53:26,665 INFO L87 Difference]: Start difference. First operand 23095 states and 69445 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:28,903 INFO L93 Difference]: Finished difference Result 25724 states and 76738 transitions. [2021-06-05 15:53:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:53:28,904 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:28,937 INFO L225 Difference]: With dead ends: 25724 [2021-06-05 15:53:28,937 INFO L226 Difference]: Without dead ends: 25407 [2021-06-05 15:53:28,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1664.0ms TimeCoverageRelationStatistics Valid=316, Invalid=4106, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:53:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25407 states. [2021-06-05 15:53:29,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25407 to 23087. [2021-06-05 15:53:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23087 states, 23086 states have (on average 3.007147188772416) internal successors, (69423), 23086 states have internal predecessors, (69423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23087 states to 23087 states and 69423 transitions. [2021-06-05 15:53:29,225 INFO L78 Accepts]: Start accepts. Automaton has 23087 states and 69423 transitions. Word has length 54 [2021-06-05 15:53:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:29,225 INFO L482 AbstractCegarLoop]: Abstraction has 23087 states and 69423 transitions. [2021-06-05 15:53:29,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 23087 states and 69423 transitions. [2021-06-05 15:53:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:29,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:29,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:29,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 15:53:29,447 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash -681227849, now seen corresponding path program 241 times [2021-06-05 15:53:29,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:29,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679393241] [2021-06-05 15:53:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:29,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679393241] [2021-06-05 15:53:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679393241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428257571] [2021-06-05 15:53:29,900 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:30,133 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:30,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:53:30,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:30,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:30,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:30,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:53:30,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:30,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:30,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:30,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:30,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:30,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:30,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428257571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:30,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:30,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:53:30,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072282858] [2021-06-05 15:53:30,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:30,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:30,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:30,446 INFO L87 Difference]: Start difference. First operand 23087 states and 69423 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:33,164 INFO L93 Difference]: Finished difference Result 26155 states and 77820 transitions. [2021-06-05 15:53:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:53:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:33,197 INFO L225 Difference]: With dead ends: 26155 [2021-06-05 15:53:33,197 INFO L226 Difference]: Without dead ends: 25794 [2021-06-05 15:53:33,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1709.6ms TimeCoverageRelationStatistics Valid=306, Invalid=4116, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:53:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25794 states. [2021-06-05 15:53:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25794 to 23083. [2021-06-05 15:53:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23083 states, 23082 states have (on average 3.007191751148081) internal successors, (69412), 23082 states have internal predecessors, (69412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23083 states to 23083 states and 69412 transitions. [2021-06-05 15:53:33,607 INFO L78 Accepts]: Start accepts. Automaton has 23083 states and 69412 transitions. Word has length 54 [2021-06-05 15:53:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:33,607 INFO L482 AbstractCegarLoop]: Abstraction has 23083 states and 69412 transitions. [2021-06-05 15:53:33,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 23083 states and 69412 transitions. [2021-06-05 15:53:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:33,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:33,628 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:33,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:33,829 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:33,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1502950321, now seen corresponding path program 242 times [2021-06-05 15:53:33,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:33,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286133945] [2021-06-05 15:53:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:34,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:34,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286133945] [2021-06-05 15:53:34,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286133945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:34,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498942458] [2021-06-05 15:53:34,234 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:34,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:53:34,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:34,462 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:53:34,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:53:34,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:34,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:34,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:34,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:53:34,632 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:34,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:34,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:34,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:34,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:34,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:34,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498942458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:34,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:34,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:53:34,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218146481] [2021-06-05 15:53:34,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:34,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:34,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:34,777 INFO L87 Difference]: Start difference. First operand 23083 states and 69412 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:37,174 INFO L93 Difference]: Finished difference Result 25696 states and 76688 transitions. [2021-06-05 15:53:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:53:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:37,208 INFO L225 Difference]: With dead ends: 25696 [2021-06-05 15:53:37,208 INFO L226 Difference]: Without dead ends: 25358 [2021-06-05 15:53:37,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1557.4ms TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:53:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2021-06-05 15:53:37,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 23084. [2021-06-05 15:53:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23084 states, 23083 states have (on average 3.0072347615128017) internal successors, (69416), 23083 states have internal predecessors, (69416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23084 states to 23084 states and 69416 transitions. [2021-06-05 15:53:37,566 INFO L78 Accepts]: Start accepts. Automaton has 23084 states and 69416 transitions. Word has length 54 [2021-06-05 15:53:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:37,567 INFO L482 AbstractCegarLoop]: Abstraction has 23084 states and 69416 transitions. [2021-06-05 15:53:37,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 23084 states and 69416 transitions. [2021-06-05 15:53:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:37,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:37,589 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:37,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 15:53:37,793 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:37,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash -723806935, now seen corresponding path program 243 times [2021-06-05 15:53:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:37,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485698203] [2021-06-05 15:53:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:38,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:38,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485698203] [2021-06-05 15:53:38,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485698203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:38,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850348201] [2021-06-05 15:53:38,176 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:38,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:53:38,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:53:38,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:38,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:38,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:38,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:53:38,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:38,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:38,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:38,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 15:53:38,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:38,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:38,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:38,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:38,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:38,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:38,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850348201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:38,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:38,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2021-06-05 15:53:38,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359130272] [2021-06-05 15:53:38,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 15:53:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 15:53:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:53:38,832 INFO L87 Difference]: Start difference. First operand 23084 states and 69416 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:43,272 INFO L93 Difference]: Finished difference Result 26895 states and 79744 transitions. [2021-06-05 15:53:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 15:53:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:43,305 INFO L225 Difference]: With dead ends: 26895 [2021-06-05 15:53:43,305 INFO L226 Difference]: Without dead ends: 26430 [2021-06-05 15:53:43,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 3176.2ms TimeCoverageRelationStatistics Valid=719, Invalid=9787, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 15:53:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26430 states. [2021-06-05 15:53:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26430 to 23112. [2021-06-05 15:53:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23112 states, 23111 states have (on average 3.006750032452079) internal successors, (69489), 23111 states have internal predecessors, (69489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23112 states to 23112 states and 69489 transitions. [2021-06-05 15:53:43,596 INFO L78 Accepts]: Start accepts. Automaton has 23112 states and 69489 transitions. Word has length 54 [2021-06-05 15:53:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:43,596 INFO L482 AbstractCegarLoop]: Abstraction has 23112 states and 69489 transitions. [2021-06-05 15:53:43,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 23112 states and 69489 transitions. [2021-06-05 15:53:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:43,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:43,618 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:43,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 15:53:43,818 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:43,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1648379827, now seen corresponding path program 244 times [2021-06-05 15:53:43,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:43,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203708488] [2021-06-05 15:53:43,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:44,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203708488] [2021-06-05 15:53:44,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203708488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980622953] [2021-06-05 15:53:44,222 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:44,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:53:44,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:44,453 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:44,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:53:44,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:44,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:44,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:44,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:53:44,624 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:44,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:44,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:44,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:44,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:44,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:53:44,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980622953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:44,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:44,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:53:44,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186945820] [2021-06-05 15:53:44,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:53:44,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:44,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:53:44,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:53:44,769 INFO L87 Difference]: Start difference. First operand 23112 states and 69489 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:47,366 INFO L93 Difference]: Finished difference Result 26597 states and 79362 transitions. [2021-06-05 15:53:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:53:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:47,402 INFO L225 Difference]: With dead ends: 26597 [2021-06-05 15:53:47,402 INFO L226 Difference]: Without dead ends: 26259 [2021-06-05 15:53:47,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1627.4ms TimeCoverageRelationStatistics Valid=299, Invalid=3861, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:53:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26259 states. [2021-06-05 15:53:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26259 to 23115. [2021-06-05 15:53:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23115 states, 23114 states have (on average 3.0067058925326644) internal successors, (69497), 23114 states have internal predecessors, (69497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23115 states to 23115 states and 69497 transitions. [2021-06-05 15:53:47,699 INFO L78 Accepts]: Start accepts. Automaton has 23115 states and 69497 transitions. Word has length 54 [2021-06-05 15:53:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:47,700 INFO L482 AbstractCegarLoop]: Abstraction has 23115 states and 69497 transitions. [2021-06-05 15:53:47,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 23115 states and 69497 transitions. [2021-06-05 15:53:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:47,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:47,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:47,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:47,923 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:47,923 INFO L82 PathProgramCache]: Analyzing trace with hash 835703373, now seen corresponding path program 245 times [2021-06-05 15:53:47,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:47,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308230112] [2021-06-05 15:53:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:53:48,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:48,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308230112] [2021-06-05 15:53:48,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308230112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:48,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738363187] [2021-06-05 15:53:48,318 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:48,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:53:48,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:48,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:48,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:48,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:48,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:53:48,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:53:48,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 15:53:48,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:48,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:48,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:48,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:25 [2021-06-05 15:53:48,938 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:53:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:53:48,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:48,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:48,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:48,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 15:53:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:49,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738363187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:49,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:49,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 42 [2021-06-05 15:53:49,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138809789] [2021-06-05 15:53:49,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:53:49,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:49,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:53:49,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:53:49,168 INFO L87 Difference]: Start difference. First operand 23115 states and 69497 transitions. Second operand has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:56,087 INFO L93 Difference]: Finished difference Result 28936 states and 85840 transitions. [2021-06-05 15:53:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 15:53:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:56,125 INFO L225 Difference]: With dead ends: 28936 [2021-06-05 15:53:56,125 INFO L226 Difference]: Without dead ends: 28693 [2021-06-05 15:53:56,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5477 ImplicationChecksByTransitivity, 4899.1ms TimeCoverageRelationStatistics Valid=1154, Invalid=16936, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 15:53:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28693 states. [2021-06-05 15:53:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28693 to 23311. [2021-06-05 15:53:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23311 states, 23310 states have (on average 3.005920205920206) internal successors, (70068), 23310 states have internal predecessors, (70068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23311 states to 23311 states and 70068 transitions. [2021-06-05 15:53:56,426 INFO L78 Accepts]: Start accepts. Automaton has 23311 states and 70068 transitions. Word has length 54 [2021-06-05 15:53:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:53:56,426 INFO L482 AbstractCegarLoop]: Abstraction has 23311 states and 70068 transitions. [2021-06-05 15:53:56,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23311 states and 70068 transitions. [2021-06-05 15:53:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:53:56,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:53:56,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:53:56,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-06-05 15:53:56,649 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:53:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:53:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 279376749, now seen corresponding path program 246 times [2021-06-05 15:53:56,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:53:56,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936031454] [2021-06-05 15:53:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:53:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:53:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:57,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:53:57,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936031454] [2021-06-05 15:53:57,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936031454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:57,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892403353] [2021-06-05 15:53:57,012 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:53:57,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:53:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:53:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:53:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:53:57,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:57,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:53:57,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:57,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:57,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:57,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:53:57,411 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:53:57,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:53:57,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:53:57,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:53:57,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:53:57,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:53:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:53:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892403353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:53:57,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:53:57,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 15:53:57,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863461156] [2021-06-05 15:53:57,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:53:57,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:53:57,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:53:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:53:57,556 INFO L87 Difference]: Start difference. First operand 23311 states and 70068 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:53:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:53:59,927 INFO L93 Difference]: Finished difference Result 27264 states and 81216 transitions. [2021-06-05 15:53:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:53:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:53:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:53:59,962 INFO L225 Difference]: With dead ends: 27264 [2021-06-05 15:53:59,962 INFO L226 Difference]: Without dead ends: 26951 [2021-06-05 15:53:59,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1629.0ms TimeCoverageRelationStatistics Valid=305, Invalid=4117, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:53:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26951 states. [2021-06-05 15:54:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26951 to 23323. [2021-06-05 15:54:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23323 states, 23322 states have (on average 3.0057885258554156) internal successors, (70101), 23322 states have internal predecessors, (70101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23323 states to 23323 states and 70101 transitions. [2021-06-05 15:54:00,262 INFO L78 Accepts]: Start accepts. Automaton has 23323 states and 70101 transitions. Word has length 54 [2021-06-05 15:54:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:00,262 INFO L482 AbstractCegarLoop]: Abstraction has 23323 states and 70101 transitions. [2021-06-05 15:54:00,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 23323 states and 70101 transitions. [2021-06-05 15:54:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:54:00,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:00,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:00,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:00,485 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:00,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1969347959, now seen corresponding path program 247 times [2021-06-05 15:54:00,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:00,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377763007] [2021-06-05 15:54:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:00,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:00,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377763007] [2021-06-05 15:54:00,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377763007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:00,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766177274] [2021-06-05 15:54:00,873 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:00,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:54:00,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:01,103 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:01,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:54:01,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:01,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:01,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:01,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:54:01,235 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:01,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:54:01,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:01,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:01,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:01,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:54:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:54:01,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766177274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:01,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:01,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:54:01,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644337206] [2021-06-05 15:54:01,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:54:01,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:01,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:54:01,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:54:01,410 INFO L87 Difference]: Start difference. First operand 23323 states and 70101 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:03,933 INFO L93 Difference]: Finished difference Result 28386 states and 84595 transitions. [2021-06-05 15:54:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:54:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:54:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:03,971 INFO L225 Difference]: With dead ends: 28386 [2021-06-05 15:54:03,971 INFO L226 Difference]: Without dead ends: 28165 [2021-06-05 15:54:03,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1658.1ms TimeCoverageRelationStatistics Valid=309, Invalid=3981, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:54:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28165 states. [2021-06-05 15:54:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28165 to 23327. [2021-06-05 15:54:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23327 states, 23326 states have (on average 3.0057446626082482) internal successors, (70112), 23326 states have internal predecessors, (70112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23327 states to 23327 states and 70112 transitions. [2021-06-05 15:54:04,270 INFO L78 Accepts]: Start accepts. Automaton has 23327 states and 70112 transitions. Word has length 54 [2021-06-05 15:54:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:04,270 INFO L482 AbstractCegarLoop]: Abstraction has 23327 states and 70112 transitions. [2021-06-05 15:54:04,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23327 states and 70112 transitions. [2021-06-05 15:54:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:54:04,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:04,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:04,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:04,493 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash -375247763, now seen corresponding path program 248 times [2021-06-05 15:54:04,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:04,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238207480] [2021-06-05 15:54:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:04,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238207480] [2021-06-05 15:54:04,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238207480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163535857] [2021-06-05 15:54:04,886 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:04,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:54:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:54:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:05,116 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:54:05,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:54:05,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:05,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:05,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:05,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:54:05,249 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:05,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:54:05,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:05,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:05,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:05,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:54:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:54:05,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163535857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:05,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:05,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:54:05,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973992516] [2021-06-05 15:54:05,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:54:05,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:54:05,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:54:05,421 INFO L87 Difference]: Start difference. First operand 23327 states and 70112 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:08,278 INFO L93 Difference]: Finished difference Result 30086 states and 89416 transitions. [2021-06-05 15:54:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:54:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:54:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:08,319 INFO L225 Difference]: With dead ends: 30086 [2021-06-05 15:54:08,319 INFO L226 Difference]: Without dead ends: 29900 [2021-06-05 15:54:08,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1632.0ms TimeCoverageRelationStatistics Valid=314, Invalid=4108, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:54:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29900 states. [2021-06-05 15:54:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29900 to 23307. [2021-06-05 15:54:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23307 states, 23306 states have (on average 3.005964129408736) internal successors, (70057), 23306 states have internal predecessors, (70057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23307 states to 23307 states and 70057 transitions. [2021-06-05 15:54:08,631 INFO L78 Accepts]: Start accepts. Automaton has 23307 states and 70057 transitions. Word has length 54 [2021-06-05 15:54:08,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:08,631 INFO L482 AbstractCegarLoop]: Abstraction has 23307 states and 70057 transitions. [2021-06-05 15:54:08,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 23307 states and 70057 transitions. [2021-06-05 15:54:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:54:08,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:08,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:08,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:08,861 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 382576631, now seen corresponding path program 249 times [2021-06-05 15:54:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:08,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711567904] [2021-06-05 15:54:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:09,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:09,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711567904] [2021-06-05 15:54:09,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711567904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:09,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274946899] [2021-06-05 15:54:09,235 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:54:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:54:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:09,470 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:09,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:54:09,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:09,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:09,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:09,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:54:09,640 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:09,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:54:09,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:09,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:09,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:09,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:54:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:54:09,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274946899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:09,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:09,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:54:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335047540] [2021-06-05 15:54:09,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:54:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:54:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:54:09,790 INFO L87 Difference]: Start difference. First operand 23307 states and 70057 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:12,096 INFO L93 Difference]: Finished difference Result 25963 states and 77444 transitions. [2021-06-05 15:54:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:54:12,097 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:54:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:12,131 INFO L225 Difference]: With dead ends: 25963 [2021-06-05 15:54:12,131 INFO L226 Difference]: Without dead ends: 25602 [2021-06-05 15:54:12,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1642.2ms TimeCoverageRelationStatistics Valid=306, Invalid=3984, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:54:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25602 states. [2021-06-05 15:54:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25602 to 23312. [2021-06-05 15:54:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23312 states, 23311 states have (on average 3.005919951954013) internal successors, (70071), 23311 states have internal predecessors, (70071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23312 states to 23312 states and 70071 transitions. [2021-06-05 15:54:12,424 INFO L78 Accepts]: Start accepts. Automaton has 23312 states and 70071 transitions. Word has length 54 [2021-06-05 15:54:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:12,424 INFO L482 AbstractCegarLoop]: Abstraction has 23312 states and 70071 transitions. [2021-06-05 15:54:12,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23312 states and 70071 transitions. [2021-06-05 15:54:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:54:12,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:12,445 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:12,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:12,646 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash -550363173, now seen corresponding path program 250 times [2021-06-05 15:54:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:12,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086518506] [2021-06-05 15:54:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:13,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:13,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086518506] [2021-06-05 15:54:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086518506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:13,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063867004] [2021-06-05 15:54:13,017 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:13,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:54:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 15:54:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:13,252 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:13,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:54:13,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:13,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:13,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:13,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:54:13,420 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:54:13,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:54:13,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:13,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:13,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:13,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 15:54:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:54:13,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063867004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:13,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:13,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:54:13,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560837733] [2021-06-05 15:54:13,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:54:13,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:13,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:54:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:54:13,568 INFO L87 Difference]: Start difference. First operand 23312 states and 70071 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:54:15,957 INFO L93 Difference]: Finished difference Result 27045 states and 80567 transitions. [2021-06-05 15:54:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:54:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:54:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:54:15,993 INFO L225 Difference]: With dead ends: 27045 [2021-06-05 15:54:15,993 INFO L226 Difference]: Without dead ends: 26719 [2021-06-05 15:54:15,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1682.5ms TimeCoverageRelationStatistics Valid=300, Invalid=3990, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:54:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26719 states. [2021-06-05 15:54:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26719 to 23324. [2021-06-05 15:54:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23324 states, 23323 states have (on average 3.0057882776658236) internal successors, (70104), 23323 states have internal predecessors, (70104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23324 states to 23324 states and 70104 transitions. [2021-06-05 15:54:16,286 INFO L78 Accepts]: Start accepts. Automaton has 23324 states and 70104 transitions. Word has length 54 [2021-06-05 15:54:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:54:16,286 INFO L482 AbstractCegarLoop]: Abstraction has 23324 states and 70104 transitions. [2021-06-05 15:54:16,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:54:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 23324 states and 70104 transitions. [2021-06-05 15:54:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:54:16,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:54:16,308 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:54:16,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:16,508 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:54:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:54:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash 770092561, now seen corresponding path program 251 times [2021-06-05 15:54:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:54:16,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29104993] [2021-06-05 15:54:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:54:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:54:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:54:16,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:54:16,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29104993] [2021-06-05 15:54:16,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29104993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:16,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577113027] [2021-06-05 15:54:16,878 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:16,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:54:16,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:54:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:54:16,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:54:17,117 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:17,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:54:17,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:17,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:17,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:17,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:54:17,253 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:54:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:54:17,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:54:17,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:54:17,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:54:17,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 15:54:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:54:17,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577113027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:54:17,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:54:17,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 15:54:17,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814278513] [2021-06-05 15:54:17,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:54:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:54:17,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:54:17,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:54:17,430 INFO L87 Difference]: Start difference. First operand 23324 states and 70104 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:54:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:54:19,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:54:19,499 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:54:19,501 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:54:19,502 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:54:19,502 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:54:19 BasicIcfg [2021-06-05 15:54:19,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:54:19,503 INFO L168 Benchmark]: Toolchain (without parser) took 782850.89 ms. Allocated memory was 341.8 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 321.7 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 15:54:19,503 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 341.8 MB. Free memory was 322.9 MB in the beginning and 322.8 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:54:19,503 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.50 ms. Allocated memory is still 341.8 MB. Free memory was 321.6 MB in the beginning and 320.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:54:19,503 INFO L168 Benchmark]: Boogie Preprocessor took 21.19 ms. Allocated memory is still 341.8 MB. Free memory was 320.2 MB in the beginning and 319.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:54:19,503 INFO L168 Benchmark]: RCFGBuilder took 270.59 ms. Allocated memory is still 341.8 MB. Free memory was 319.1 MB in the beginning and 303.4 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 15:54:19,503 INFO L168 Benchmark]: TraceAbstraction took 782530.28 ms. Allocated memory was 341.8 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 302.9 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 15:54:19,503 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 341.8 MB. Free memory was 322.9 MB in the beginning and 322.8 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.50 ms. Allocated memory is still 341.8 MB. Free memory was 321.6 MB in the beginning and 320.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.19 ms. Allocated memory is still 341.8 MB. Free memory was 320.2 MB in the beginning and 319.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 270.59 ms. Allocated memory is still 341.8 MB. Free memory was 319.1 MB in the beginning and 303.4 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 782530.28 ms. Allocated memory was 341.8 MB in the beginning and 2.7 GB in the end (delta: 2.4 GB). Free memory was 302.9 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (23324states) and FLOYD_HOARE automaton (currently 30 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (2135 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (23324states) and FLOYD_HOARE automaton (currently 30 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (2135 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (23324states) and FLOYD_HOARE automaton (currently 30 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (2135 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (23324states) and FLOYD_HOARE automaton (currently 30 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (2135 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 782426.8ms, OverallIterations: 259, TraceHistogramMax: 3, EmptinessCheckTime: 3609.1ms, AutomataDifference: 490244.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 43295 SDtfs, 93845 SDslu, 767836 SDs, 0 SdLazy, 674336 SolverSat, 14017 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 214641.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23956 GetRequests, 8688 SyntacticMatches, 761 SemanticMatches, 14507 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219182 ImplicationChecksByTransitivity, 340114.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23327occurred in iteration=255, InterpolantAutomatonStates: 10500, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49144.0ms AutomataMinimizationTime, 258 MinimizatonAttempts, 712800 StatesRemovedByMinimization, 254 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1248.4ms SsaConstructionTime, 3631.1ms SatisfiabilityAnalysisTime, 177922.7ms InterpolantComputationTime, 24802 NumberOfCodeBlocks, 24788 NumberOfCodeBlocksAsserted, 829 NumberOfCheckSat, 24288 ConstructedInterpolants, 275 QuantifiedInterpolants, 384103 SizeOfPredicates, 2880 NumberOfNonLiveVariables, 29925 ConjunctsInSsa, 10092 ConjunctsInUnsatCore, 514 InterpolantComputations, 5 PerfectInterpolantSequences, 1378/13793 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown