/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/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:29:51,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:29:51,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:29:51,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:29:51,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:29:51,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:29:51,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:29:51,828 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 15:29:51,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:29:51,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:29:51,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:29:51,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:29:51,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:29:51,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:29:51,865 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:29:51,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:29:51,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:29:51,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:29:51,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:29:51,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:29:51,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:29:51,867 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:29:51,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:29:51,868 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:29:51,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:29:52,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:29:52,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:29:52,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:29:52,126 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:29:52,127 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:29:52,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2021-06-05 15:29:52,128 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-06-05 15:29:52,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:29:52,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:29:52,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:29:52,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:29:52,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:29:52,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:29:52,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:29:52,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:29:52,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:29:52,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/1) ... [2021-06-05 15:29:52,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:29:52,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:29:52,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:29:52,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:29:52,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (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 15:29:52,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:29:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:29:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:29:52,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:29:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:29:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:29:52,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:29:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:29:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:29:52,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:29:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:29:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:29:52,249 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:29:52,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:29:52,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:29:52,249 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 15:29:52,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:29:52,396 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:29:52,397 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:29:52 BoogieIcfgContainer [2021-06-05 15:29:52,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:29:52,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:29:52,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:29:52,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:29:52,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:29:52" (1/2) ... [2021-06-05 15:29:52,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bca91a and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:29:52, skipping insertion in model container [2021-06-05 15:29:52,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:29:52" (2/2) ... [2021-06-05 15:29:52,402 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-06-05 15:29:52,405 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:29:52,406 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:29:52,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:29:52,406 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:29:52,477 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 15:29:52,490 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 15:29:52,502 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:29:52,503 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:29:52,503 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:29:52,503 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:29:52,503 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:29:52,503 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:29:52,503 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:29:52,503 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:29:52,509 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2021-06-05 15:29:52,547 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:29:52,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:52,565 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] [2021-06-05 15:29:52,565 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash -412067460, now seen corresponding path program 1 times [2021-06-05 15:29:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:52,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301719607] [2021-06-05 15:29:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:52,714 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 15:29:52,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:52,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301719607] [2021-06-05 15:29:52,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301719607] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:29:52,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:29:52,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:29:52,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135706641] [2021-06-05 15:29:52,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:29:52,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:29:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:29:52,736 INFO L87 Difference]: Start difference. First operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:52,830 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2021-06-05 15:29:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:29:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:29:52,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:52,852 INFO L225 Difference]: With dead ends: 857 [2021-06-05 15:29:52,852 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 15:29:52,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:29:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 15:29:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2021-06-05 15:29:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2021-06-05 15:29:52,942 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2021-06-05 15:29:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:52,943 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2021-06-05 15:29:52,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2021-06-05 15:29:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:29:52,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:52,952 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] [2021-06-05 15:29:52,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:29:52,953 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:52,956 INFO L82 PathProgramCache]: Analyzing trace with hash 571605306, now seen corresponding path program 1 times [2021-06-05 15:29:52,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:52,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135539580] [2021-06-05 15:29:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:53,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:53,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135539580] [2021-06-05 15:29:53,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135539580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:53,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732096961] [2021-06-05 15:29:53,069 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 15:29:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:53,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:29:53,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:53,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732096961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:53,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:53,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 15:29:53,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526472136] [2021-06-05 15:29:53,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:29:53,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:29:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:29:53,244 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:53,326 INFO L93 Difference]: Finished difference Result 1528 states and 5659 transitions. [2021-06-05 15:29:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:29:53,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:29:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:53,335 INFO L225 Difference]: With dead ends: 1528 [2021-06-05 15:29:53,335 INFO L226 Difference]: Without dead ends: 1528 [2021-06-05 15:29:53,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-05 15:29:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 838. [2021-06-05 15:29:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.771804062126643) internal successors, (3157), 837 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 3157 transitions. [2021-06-05 15:29:53,363 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 3157 transitions. Word has length 24 [2021-06-05 15:29:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:53,364 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 3157 transitions. [2021-06-05 15:29:53,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 3157 transitions. [2021-06-05 15:29:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:29:53,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:53,366 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] [2021-06-05 15:29:53,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 15:29:53,582 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:53,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2854590, now seen corresponding path program 1 times [2021-06-05 15:29:53,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:53,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816154187] [2021-06-05 15:29:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:53,670 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 15:29:53,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:53,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816154187] [2021-06-05 15:29:53,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816154187] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:29:53,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:29:53,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:29:53,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099933155] [2021-06-05 15:29:53,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:29:53,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:53,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:29:53,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:29:53,671 INFO L87 Difference]: Start difference. First operand 838 states and 3157 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:53,723 INFO L93 Difference]: Finished difference Result 1187 states and 4245 transitions. [2021-06-05 15:29:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:29:53,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:29:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:53,729 INFO L225 Difference]: With dead ends: 1187 [2021-06-05 15:29:53,729 INFO L226 Difference]: Without dead ends: 1077 [2021-06-05 15:29:53,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:29:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-06-05 15:29:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 806. [2021-06-05 15:29:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.7950310559006213) internal successors, (3055), 805 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 3055 transitions. [2021-06-05 15:29:53,752 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 3055 transitions. Word has length 24 [2021-06-05 15:29:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:53,753 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 3055 transitions. [2021-06-05 15:29:53,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 3055 transitions. [2021-06-05 15:29:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:29:53,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:53,755 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] [2021-06-05 15:29:53,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:29:53,755 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:53,756 INFO L82 PathProgramCache]: Analyzing trace with hash -257890470, now seen corresponding path program 2 times [2021-06-05 15:29:53,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:53,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108824573] [2021-06-05 15:29:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:53,804 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 15:29:53,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:53,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108824573] [2021-06-05 15:29:53,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108824573] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:29:53,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:29:53,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:29:53,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664776115] [2021-06-05 15:29:53,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:29:53,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:29:53,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:29:53,807 INFO L87 Difference]: Start difference. First operand 806 states and 3055 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:53,848 INFO L93 Difference]: Finished difference Result 1023 states and 3746 transitions. [2021-06-05 15:29:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:29:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:29:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:53,854 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 15:29:53,854 INFO L226 Difference]: Without dead ends: 1023 [2021-06-05 15:29:53,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:29:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-06-05 15:29:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 848. [2021-06-05 15:29:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.7485242030696577) internal successors, (3175), 847 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 3175 transitions. [2021-06-05 15:29:53,876 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 3175 transitions. Word has length 24 [2021-06-05 15:29:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:53,877 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 3175 transitions. [2021-06-05 15:29:53,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 3175 transitions. [2021-06-05 15:29:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:29:53,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:53,880 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] [2021-06-05 15:29:53,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:29:53,880 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:53,881 INFO L82 PathProgramCache]: Analyzing trace with hash 370394274, now seen corresponding path program 2 times [2021-06-05 15:29:53,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:53,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876332823] [2021-06-05 15:29:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:53,924 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 15:29:53,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:53,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876332823] [2021-06-05 15:29:53,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876332823] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:29:53,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:29:53,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:29:53,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615882888] [2021-06-05 15:29:53,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:29:53,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:29:53,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:29:53,925 INFO L87 Difference]: Start difference. First operand 848 states and 3175 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:53,959 INFO L93 Difference]: Finished difference Result 1118 states and 4122 transitions. [2021-06-05 15:29:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:29:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:29:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:53,964 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 15:29:53,964 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 15:29:53,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:29:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 15:29:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-06-05 15:29:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.7671711292200234) internal successors, (3236), 859 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3236 transitions. [2021-06-05 15:29:53,985 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3236 transitions. Word has length 24 [2021-06-05 15:29:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:53,985 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 3236 transitions. [2021-06-05 15:29:53,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3236 transitions. [2021-06-05 15:29:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:29:53,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:53,989 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] [2021-06-05 15:29:53,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:29:53,989 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1537471606, now seen corresponding path program 3 times [2021-06-05 15:29:53,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:53,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863384113] [2021-06-05 15:29:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:54,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:54,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863384113] [2021-06-05 15:29:54,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863384113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:54,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601058274] [2021-06-05 15:29:54,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:29:54,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:29:54,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:29:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:54,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601058274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:54,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:54,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 15:29:54,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615377868] [2021-06-05 15:29:54,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:29:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:54,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:29:54,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:29:54,170 INFO L87 Difference]: Start difference. First operand 860 states and 3236 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:54,221 INFO L93 Difference]: Finished difference Result 882 states and 3347 transitions. [2021-06-05 15:29:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:29:54,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:29:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:54,225 INFO L225 Difference]: With dead ends: 882 [2021-06-05 15:29:54,225 INFO L226 Difference]: Without dead ends: 822 [2021-06-05 15:29:54,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-05 15:29:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 702. [2021-06-05 15:29:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.843081312410842) internal successors, (2694), 701 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2694 transitions. [2021-06-05 15:29:54,256 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2694 transitions. Word has length 24 [2021-06-05 15:29:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:54,256 INFO L482 AbstractCegarLoop]: Abstraction has 702 states and 2694 transitions. [2021-06-05 15:29:54,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2694 transitions. [2021-06-05 15:29:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:29:54,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:54,258 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] [2021-06-05 15:29:54,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:54,473 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:54,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1935675546, now seen corresponding path program 1 times [2021-06-05 15:29:54,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:54,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787444328] [2021-06-05 15:29:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:54,518 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 15:29:54,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:54,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787444328] [2021-06-05 15:29:54,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787444328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:54,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003797262] [2021-06-05 15:29:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:29:54,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:54,642 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 15:29:54,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003797262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:54,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:54,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-05 15:29:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320743664] [2021-06-05 15:29:54,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:29:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:29:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:54,643 INFO L87 Difference]: Start difference. First operand 702 states and 2694 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:54,703 INFO L93 Difference]: Finished difference Result 926 states and 3582 transitions. [2021-06-05 15:29:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:29:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:29:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:54,708 INFO L225 Difference]: With dead ends: 926 [2021-06-05 15:29:54,708 INFO L226 Difference]: Without dead ends: 926 [2021-06-05 15:29:54,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:29:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-06-05 15:29:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 802. [2021-06-05 15:29:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2021-06-05 15:29:54,731 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2021-06-05 15:29:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:54,731 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2021-06-05 15:29:54,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2021-06-05 15:29:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:29:54,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:54,733 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:54,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:54,949 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1942494820, now seen corresponding path program 1 times [2021-06-05 15:29:54,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:54,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203857480] [2021-06-05 15:29:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:55,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:55,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203857480] [2021-06-05 15:29:55,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203857480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:55,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416003633] [2021-06-05 15:29:55,003 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 15:29:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:55,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:29:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:55,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416003633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:55,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:55,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-06-05 15:29:55,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126263005] [2021-06-05 15:29:55,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:29:55,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:29:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:55,116 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:55,172 INFO L93 Difference]: Finished difference Result 1509 states and 5726 transitions. [2021-06-05 15:29:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:29:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:29:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:55,180 INFO L225 Difference]: With dead ends: 1509 [2021-06-05 15:29:55,180 INFO L226 Difference]: Without dead ends: 1509 [2021-06-05 15:29:55,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:29:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-05 15:29:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 953. [2021-06-05 15:29:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2021-06-05 15:29:55,204 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2021-06-05 15:29:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:55,204 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2021-06-05 15:29:55,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2021-06-05 15:29:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:29:55,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:55,208 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:55,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:55,424 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -210647880, now seen corresponding path program 2 times [2021-06-05 15:29:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181025807] [2021-06-05 15:29:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:55,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:55,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181025807] [2021-06-05 15:29:55,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181025807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:55,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466579726] [2021-06-05 15:29:55,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:55,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:29:55,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:29:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:55,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466579726] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:29:55,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:29:55,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-06-05 15:29:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098179336] [2021-06-05 15:29:55,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:29:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:29:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:55,584 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:55,619 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2021-06-05 15:29:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:29:55,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:29:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:55,624 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 15:29:55,624 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 15:29:55,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:29:55,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 15:29:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2021-06-05 15:29:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2021-06-05 15:29:55,647 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2021-06-05 15:29:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:55,647 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2021-06-05 15:29:55,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2021-06-05 15:29:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:29:55,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:55,649 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 15:29:55,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:55,861 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash 319966110, now seen corresponding path program 1 times [2021-06-05 15:29:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:55,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264588440] [2021-06-05 15:29:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:55,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:55,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264588440] [2021-06-05 15:29:55,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264588440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844449782] [2021-06-05 15:29:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:29:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:55,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:29:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:56,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844449782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:56,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:56,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 15:29:56,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549820616] [2021-06-05 15:29:56,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:29:56,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:56,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:29:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:29:56,043 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:56,148 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2021-06-05 15:29:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:29:56,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:29:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:56,167 INFO L225 Difference]: With dead ends: 4025 [2021-06-05 15:29:56,167 INFO L226 Difference]: Without dead ends: 3705 [2021-06-05 15:29:56,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:29:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-06-05 15:29:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2021-06-05 15:29:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2021-06-05 15:29:56,243 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2021-06-05 15:29:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:56,244 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2021-06-05 15:29:56,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2021-06-05 15:29:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:29:56,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:56,250 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:56,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:56,467 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash -874031780, now seen corresponding path program 2 times [2021-06-05 15:29:56,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:56,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728608858] [2021-06-05 15:29:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:56,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:56,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728608858] [2021-06-05 15:29:56,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728608858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:56,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573620982] [2021-06-05 15:29:56,514 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:56,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:29:56,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:29:56,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:56,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573620982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:56,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:56,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 15:29:56,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297143639] [2021-06-05 15:29:56,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:29:56,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:56,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:29:56,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:29:56,644 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:56,915 INFO L93 Difference]: Finished difference Result 11823 states and 45853 transitions. [2021-06-05 15:29:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:29:56,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:29:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:56,954 INFO L225 Difference]: With dead ends: 11823 [2021-06-05 15:29:56,954 INFO L226 Difference]: Without dead ends: 11823 [2021-06-05 15:29:56,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:29:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11823 states. [2021-06-05 15:29:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11823 to 4060. [2021-06-05 15:29:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2021-06-05 15:29:57,108 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2021-06-05 15:29:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:57,108 INFO L482 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2021-06-05 15:29:57,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2021-06-05 15:29:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:29:57,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:57,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:57,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:57,334 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1773521824, now seen corresponding path program 3 times [2021-06-05 15:29:57,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:57,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754315538] [2021-06-05 15:29:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:57,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:57,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754315538] [2021-06-05 15:29:57,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754315538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:57,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000514430] [2021-06-05 15:29:57,390 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 15:29:57,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:29:57,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:29:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:57,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000514430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:57,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:57,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:29:57,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114062438] [2021-06-05 15:29:57,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:29:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:57,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:29:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:29:57,514 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 15:29:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:58,181 INFO L93 Difference]: Finished difference Result 18640 states and 72700 transitions. [2021-06-05 15:29:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:29:58,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:29:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:58,238 INFO L225 Difference]: With dead ends: 18640 [2021-06-05 15:29:58,238 INFO L226 Difference]: Without dead ends: 17252 [2021-06-05 15:29:58,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:29:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17252 states. [2021-06-05 15:29:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17252 to 8566. [2021-06-05 15:29:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.2192644483362525) internal successors, (36138), 8565 states have internal predecessors, (36138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:58,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 36138 transitions. [2021-06-05 15:29:58,616 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 36138 transitions. Word has length 32 [2021-06-05 15:29:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:58,616 INFO L482 AbstractCegarLoop]: Abstraction has 8566 states and 36138 transitions. [2021-06-05 15:29:58,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 15:29:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 36138 transitions. [2021-06-05 15:29:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:29:58,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:58,671 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:58,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 15:29:58,887 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash -402067132, now seen corresponding path program 4 times [2021-06-05 15:29:58,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:58,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090688069] [2021-06-05 15:29:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:58,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:58,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090688069] [2021-06-05 15:29:58,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090688069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:58,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939935383] [2021-06-05 15:29:58,976 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 15:29:59,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:29:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:59,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939935383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:59,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:59,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:29:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71589862] [2021-06-05 15:29:59,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:29:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:29:59,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:29:59,121 INFO L87 Difference]: Start difference. First operand 8566 states and 36138 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:59,259 INFO L93 Difference]: Finished difference Result 13296 states and 52964 transitions. [2021-06-05 15:29:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:29:59,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:29:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:59,302 INFO L225 Difference]: With dead ends: 13296 [2021-06-05 15:29:59,302 INFO L226 Difference]: Without dead ends: 13128 [2021-06-05 15:29:59,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:29:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-06-05 15:29:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 8482. [2021-06-05 15:29:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 8481 states have (on average 4.17851668435326) internal successors, (35438), 8481 states have internal predecessors, (35438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 35438 transitions. [2021-06-05 15:29:59,546 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 35438 transitions. Word has length 32 [2021-06-05 15:29:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:59,546 INFO L482 AbstractCegarLoop]: Abstraction has 8482 states and 35438 transitions. [2021-06-05 15:29:59,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 35438 transitions. [2021-06-05 15:29:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:29:59,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:59,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:59,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:59,781 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1929237264, now seen corresponding path program 5 times [2021-06-05 15:29:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:59,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632158445] [2021-06-05 15:29:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:59,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:59,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632158445] [2021-06-05 15:29:59,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632158445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:59,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973187141] [2021-06-05 15:29:59,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:29:59,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:29:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:29:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:00,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973187141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:00,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:00,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 15:30:00,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941631075] [2021-06-05 15:30:00,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:30:00,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:30:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:30:00,034 INFO L87 Difference]: Start difference. First operand 8482 states and 35438 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:00,203 INFO L93 Difference]: Finished difference Result 17125 states and 69725 transitions. [2021-06-05 15:30:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:30:00,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:30:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:00,250 INFO L225 Difference]: With dead ends: 17125 [2021-06-05 15:30:00,250 INFO L226 Difference]: Without dead ends: 17125 [2021-06-05 15:30:00,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:30:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17125 states. [2021-06-05 15:30:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17125 to 10475. [2021-06-05 15:30:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10474 states have (on average 4.289765132709567) internal successors, (44931), 10474 states have internal predecessors, (44931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 44931 transitions. [2021-06-05 15:30:00,673 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 44931 transitions. Word has length 32 [2021-06-05 15:30:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:00,673 INFO L482 AbstractCegarLoop]: Abstraction has 10475 states and 44931 transitions. [2021-06-05 15:30:00,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 44931 transitions. [2021-06-05 15:30:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:30:00,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:00,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:00,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:00,913 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1951270200, now seen corresponding path program 6 times [2021-06-05 15:30:00,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:00,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439996904] [2021-06-05 15:30:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:00,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:00,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439996904] [2021-06-05 15:30:00,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439996904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:00,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107988197] [2021-06-05 15:30:00,954 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 15:30:01,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:30:01,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:30:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:30:01,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107988197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:01,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:01,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:30:01,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319215025] [2021-06-05 15:30:01,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:30:01,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:01,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:30:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:30:01,132 INFO L87 Difference]: Start difference. First operand 10475 states and 44931 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:01,275 INFO L93 Difference]: Finished difference Result 16571 states and 66710 transitions. [2021-06-05 15:30:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:30:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:30:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:01,315 INFO L225 Difference]: With dead ends: 16571 [2021-06-05 15:30:01,315 INFO L226 Difference]: Without dead ends: 16190 [2021-06-05 15:30:01,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:30:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16190 states. [2021-06-05 15:30:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16190 to 10209. [2021-06-05 15:30:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 10208 states have (on average 4.278800940438871) internal successors, (43678), 10208 states have internal predecessors, (43678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 43678 transitions. [2021-06-05 15:30:01,612 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 43678 transitions. Word has length 32 [2021-06-05 15:30:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:01,613 INFO L482 AbstractCegarLoop]: Abstraction has 10209 states and 43678 transitions. [2021-06-05 15:30:01,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 43678 transitions. [2021-06-05 15:30:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:30:01,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:01,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:01,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:30:01,856 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:01,856 INFO L82 PathProgramCache]: Analyzing trace with hash -722377608, now seen corresponding path program 7 times [2021-06-05 15:30:01,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:01,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341106839] [2021-06-05 15:30:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:01,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:01,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341106839] [2021-06-05 15:30:01,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341106839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:01,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106173118] [2021-06-05 15:30:01,910 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 15:30:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:30:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:02,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106173118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:02,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:02,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:30:02,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705976911] [2021-06-05 15:30:02,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:30:02,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:30:02,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:30:02,034 INFO L87 Difference]: Start difference. First operand 10209 states and 43678 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:02,312 INFO L93 Difference]: Finished difference Result 19431 states and 81047 transitions. [2021-06-05 15:30:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:30:02,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:30:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:02,362 INFO L225 Difference]: With dead ends: 19431 [2021-06-05 15:30:02,362 INFO L226 Difference]: Without dead ends: 19035 [2021-06-05 15:30:02,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:30:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2021-06-05 15:30:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 13737. [2021-06-05 15:30:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 4.360439720442632) internal successors, (59895), 13736 states have internal predecessors, (59895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 59895 transitions. [2021-06-05 15:30:02,757 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 59895 transitions. Word has length 32 [2021-06-05 15:30:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:02,757 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 59895 transitions. [2021-06-05 15:30:02,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 59895 transitions. [2021-06-05 15:30:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:30:02,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:02,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:02,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:30:02,990 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1698964616, now seen corresponding path program 8 times [2021-06-05 15:30:02,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:02,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648993009] [2021-06-05 15:30:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:03,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:03,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648993009] [2021-06-05 15:30:03,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648993009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:03,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571804482] [2021-06-05 15:30:03,092 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 15:30:03,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:30:03,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:30:03,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:03,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571804482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:03,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:03,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:30:03,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331914505] [2021-06-05 15:30:03,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:30:03,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:30:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:30:03,386 INFO L87 Difference]: Start difference. First operand 13737 states and 59895 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 15:30:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:04,429 INFO L93 Difference]: Finished difference Result 59639 states and 243328 transitions. [2021-06-05 15:30:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:30:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:30:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:04,636 INFO L225 Difference]: With dead ends: 59639 [2021-06-05 15:30:04,637 INFO L226 Difference]: Without dead ends: 58849 [2021-06-05 15:30:04,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:30:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58849 states. [2021-06-05 15:30:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58849 to 27180. [2021-06-05 15:30:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27180 states, 27179 states have (on average 4.433606828801648) internal successors, (120501), 27179 states have internal predecessors, (120501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27180 states to 27180 states and 120501 transitions. [2021-06-05 15:30:05,881 INFO L78 Accepts]: Start accepts. Automaton has 27180 states and 120501 transitions. Word has length 32 [2021-06-05 15:30:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:05,881 INFO L482 AbstractCegarLoop]: Abstraction has 27180 states and 120501 transitions. [2021-06-05 15:30:05,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 15:30:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 27180 states and 120501 transitions. [2021-06-05 15:30:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:30:05,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:05,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:06,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:30:06,145 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1473506436, now seen corresponding path program 9 times [2021-06-05 15:30:06,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:06,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120861567] [2021-06-05 15:30:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:06,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:06,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120861567] [2021-06-05 15:30:06,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120861567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:06,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642402964] [2021-06-05 15:30:06,341 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 15:30:06,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:30:06,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:06,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:30:06,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:30:06,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642402964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:06,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:06,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 15:30:06,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392853787] [2021-06-05 15:30:06,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:30:06,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:06,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:30:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:30:06,654 INFO L87 Difference]: Start difference. First operand 27180 states and 120501 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:06,938 INFO L93 Difference]: Finished difference Result 31277 states and 134903 transitions. [2021-06-05 15:30:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:30:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:30:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:07,039 INFO L225 Difference]: With dead ends: 31277 [2021-06-05 15:30:07,039 INFO L226 Difference]: Without dead ends: 30802 [2021-06-05 15:30:07,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:30:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-06-05 15:30:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 25038. [2021-06-05 15:30:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2021-06-05 15:30:07,747 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2021-06-05 15:30:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:07,747 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2021-06-05 15:30:07,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2021-06-05 15:30:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:30:07,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:07,798 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 15:30:08,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:08,013 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash -963056650, now seen corresponding path program 10 times [2021-06-05 15:30:08,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:08,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378711590] [2021-06-05 15:30:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:30:08,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:08,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378711590] [2021-06-05 15:30:08,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378711590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:08,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798222961] [2021-06-05 15:30:08,055 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 15:30:08,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:30:08,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:08,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:30:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:30:08,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798222961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:08,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:08,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:30:08,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998850299] [2021-06-05 15:30:08,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:30:08,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:08,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:30:08,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:30:08,310 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 15:30:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:09,274 INFO L93 Difference]: Finished difference Result 54817 states and 230789 transitions. [2021-06-05 15:30:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:30:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 34 [2021-06-05 15:30:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:09,471 INFO L225 Difference]: With dead ends: 54817 [2021-06-05 15:30:09,471 INFO L226 Difference]: Without dead ends: 53957 [2021-06-05 15:30:09,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:30:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53957 states. [2021-06-05 15:30:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53957 to 33088. [2021-06-05 15:30:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33088 states, 33087 states have (on average 4.473599903285278) internal successors, (148018), 33087 states have internal predecessors, (148018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33088 states to 33088 states and 148018 transitions. [2021-06-05 15:30:10,783 INFO L78 Accepts]: Start accepts. Automaton has 33088 states and 148018 transitions. Word has length 34 [2021-06-05 15:30:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:10,801 INFO L482 AbstractCegarLoop]: Abstraction has 33088 states and 148018 transitions. [2021-06-05 15:30:10,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 15:30:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 33088 states and 148018 transitions. [2021-06-05 15:30:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:30:10,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:10,877 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 15:30:11,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:11,078 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1490817678, now seen corresponding path program 11 times [2021-06-05 15:30:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:11,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634746728] [2021-06-05 15:30:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:30:11,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634746728] [2021-06-05 15:30:11,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634746728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127720260] [2021-06-05 15:30:11,132 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 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 15:30:11,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:30:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:30:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:30:11,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127720260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:11,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:11,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:30:11,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695496719] [2021-06-05 15:30:11,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:30:11,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:30:11,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:30:11,238 INFO L87 Difference]: Start difference. First operand 33088 states and 148018 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 15:30:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:12,273 INFO L93 Difference]: Finished difference Result 59653 states and 250894 transitions. [2021-06-05 15:30:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:30:12,274 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 34 [2021-06-05 15:30:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:12,475 INFO L225 Difference]: With dead ends: 59653 [2021-06-05 15:30:12,475 INFO L226 Difference]: Without dead ends: 58480 [2021-06-05 15:30:12,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:30:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-06-05 15:30:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 38451. [2021-06-05 15:30:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.454200260078023) internal successors, (171264), 38450 states have internal predecessors, (171264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 171264 transitions. [2021-06-05 15:30:13,866 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 171264 transitions. Word has length 34 [2021-06-05 15:30:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:13,881 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 171264 transitions. [2021-06-05 15:30:13,881 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 15:30:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 171264 transitions. [2021-06-05 15:30:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:30:14,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:14,000 INFO L521 BasicCegarLoop]: trace histogram [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 15:30:14,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:14,201 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1889373340, now seen corresponding path program 12 times [2021-06-05 15:30:14,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:14,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999825820] [2021-06-05 15:30:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:30:14,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:14,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999825820] [2021-06-05 15:30:14,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999825820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:14,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791322004] [2021-06-05 15:30:14,272 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 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 15:30:14,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:30:14,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:14,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:30:14,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:30:14,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791322004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:14,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:14,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-05 15:30:14,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653421818] [2021-06-05 15:30:14,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:30:14,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:14,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:30:14,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:30:14,419 INFO L87 Difference]: Start difference. First operand 38451 states and 171264 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 15:30:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:15,646 INFO L93 Difference]: Finished difference Result 101501 states and 447345 transitions. [2021-06-05 15:30:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:30:15,646 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 36 [2021-06-05 15:30:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:16,015 INFO L225 Difference]: With dead ends: 101501 [2021-06-05 15:30:16,015 INFO L226 Difference]: Without dead ends: 100925 [2021-06-05 15:30:16,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:30:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100925 states. [2021-06-05 15:30:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100925 to 64709. [2021-06-05 15:30:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64709 states, 64708 states have (on average 4.539284168881745) internal successors, (293728), 64708 states have internal predecessors, (293728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64709 states to 64709 states and 293728 transitions. [2021-06-05 15:30:18,154 INFO L78 Accepts]: Start accepts. Automaton has 64709 states and 293728 transitions. Word has length 36 [2021-06-05 15:30:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:18,154 INFO L482 AbstractCegarLoop]: Abstraction has 64709 states and 293728 transitions. [2021-06-05 15:30:18,155 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 15:30:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 64709 states and 293728 transitions. [2021-06-05 15:30:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:30:18,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:18,314 INFO L521 BasicCegarLoop]: trace histogram [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 15:30:18,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:30:18,516 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:18,517 INFO L82 PathProgramCache]: Analyzing trace with hash -644790412, now seen corresponding path program 13 times [2021-06-05 15:30:18,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:18,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043850667] [2021-06-05 15:30:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:30:18,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:18,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043850667] [2021-06-05 15:30:18,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043850667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:18,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839818310] [2021-06-05 15:30:18,584 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 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 15:30:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:18,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:30:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:30:19,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839818310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:19,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:19,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:30:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27253737] [2021-06-05 15:30:19,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:30:19,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:30:19,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:30:19,024 INFO L87 Difference]: Start difference. First operand 64709 states and 293728 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:22,578 INFO L93 Difference]: Finished difference Result 345279 states and 1557613 transitions. [2021-06-05 15:30:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:30:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:30:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:24,544 INFO L225 Difference]: With dead ends: 345279 [2021-06-05 15:30:24,544 INFO L226 Difference]: Without dead ends: 340111 [2021-06-05 15:30:24,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:30:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340111 states. [2021-06-05 15:30:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340111 to 209327. [2021-06-05 15:30:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209327 states, 209326 states have (on average 4.720412180044524) internal successors, (988105), 209326 states have internal predecessors, (988105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209327 states to 209327 states and 988105 transitions. [2021-06-05 15:30:33,661 INFO L78 Accepts]: Start accepts. Automaton has 209327 states and 988105 transitions. Word has length 36 [2021-06-05 15:30:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:33,661 INFO L482 AbstractCegarLoop]: Abstraction has 209327 states and 988105 transitions. [2021-06-05 15:30:33,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 209327 states and 988105 transitions. [2021-06-05 15:30:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:30:34,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:34,831 INFO L521 BasicCegarLoop]: trace histogram [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 15:30:35,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:30:35,048 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash -854765258, now seen corresponding path program 14 times [2021-06-05 15:30:35,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:35,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340217362] [2021-06-05 15:30:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:30:35,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:35,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340217362] [2021-06-05 15:30:35,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340217362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:35,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688389658] [2021-06-05 15:30:35,100 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 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 15:30:35,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:30:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:35,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:30:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:30:35,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688389658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:35,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:35,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:30:35,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067674959] [2021-06-05 15:30:35,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:30:35,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:30:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:30:35,201 INFO L87 Difference]: Start difference. First operand 209327 states and 988105 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:37,231 INFO L93 Difference]: Finished difference Result 231776 states and 1069827 transitions. [2021-06-05 15:30:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:30:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:30:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:38,683 INFO L225 Difference]: With dead ends: 231776 [2021-06-05 15:30:38,684 INFO L226 Difference]: Without dead ends: 229312 [2021-06-05 15:30:38,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:30:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229312 states. [2021-06-05 15:30:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229312 to 204036. [2021-06-05 15:30:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204036 states, 204035 states have (on average 4.715220427867767) internal successors, (962070), 204035 states have internal predecessors, (962070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204036 states to 204036 states and 962070 transitions. [2021-06-05 15:30:45,630 INFO L78 Accepts]: Start accepts. Automaton has 204036 states and 962070 transitions. Word has length 36 [2021-06-05 15:30:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:45,630 INFO L482 AbstractCegarLoop]: Abstraction has 204036 states and 962070 transitions. [2021-06-05 15:30:45,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 204036 states and 962070 transitions. [2021-06-05 15:30:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:30:46,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:46,830 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-06-05 15:30:47,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:30:47,031 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1958295198, now seen corresponding path program 15 times [2021-06-05 15:30:47,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:47,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755206070] [2021-06-05 15:30:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:47,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:47,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755206070] [2021-06-05 15:30:47,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755206070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:47,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598492792] [2021-06-05 15:30:47,109 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 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 15:30:47,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:30:47,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:30:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:30:47,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598492792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:47,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:47,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 15:30:47,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909127644] [2021-06-05 15:30:47,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:30:47,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:30:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:30:47,218 INFO L87 Difference]: Start difference. First operand 204036 states and 962070 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:52,176 INFO L93 Difference]: Finished difference Result 502202 states and 2377356 transitions. [2021-06-05 15:30:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:30:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:30:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:55,062 INFO L225 Difference]: With dead ends: 502202 [2021-06-05 15:30:55,062 INFO L226 Difference]: Without dead ends: 498334 [2021-06-05 15:30:55,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:30:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498334 states. [2021-06-05 15:31:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498334 to 386864. [2021-06-05 15:31:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386864 states, 386863 states have (on average 4.774356813652378) internal successors, (1847022), 386863 states have internal predecessors, (1847022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386864 states to 386864 states and 1847022 transitions. [2021-06-05 15:31:09,969 INFO L78 Accepts]: Start accepts. Automaton has 386864 states and 1847022 transitions. Word has length 38 [2021-06-05 15:31:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:09,970 INFO L482 AbstractCegarLoop]: Abstraction has 386864 states and 1847022 transitions. [2021-06-05 15:31:09,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 386864 states and 1847022 transitions. [2021-06-05 15:31:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:31:11,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:11,568 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:31:11,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:31:11,785 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash -79715748, now seen corresponding path program 16 times [2021-06-05 15:31:11,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:11,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670551060] [2021-06-05 15:31:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:12,429 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 15:31:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:31:12,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:12,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670551060] [2021-06-05 15:31:12,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670551060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:12,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239749658] [2021-06-05 15:31:12,440 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 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 15:31:12,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:31:12,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:31:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:31:12,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239749658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:12,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:12,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 15:31:12,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562581641] [2021-06-05 15:31:12,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:31:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:31:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:31:12,614 INFO L87 Difference]: Start difference. First operand 386864 states and 1847022 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:24,274 INFO L93 Difference]: Finished difference Result 1120732 states and 5108769 transitions. [2021-06-05 15:31:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:31:24,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 15:31:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:30,916 INFO L225 Difference]: With dead ends: 1120732 [2021-06-05 15:31:30,916 INFO L226 Difference]: Without dead ends: 1114512 [2021-06-05 15:31:30,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:31:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114512 states. [2021-06-05 15:31:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114512 to 448533. [2021-06-05 15:31:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448533 states, 448532 states have (on average 4.7567286169102765) internal successors, (2133545), 448532 states have internal predecessors, (2133545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448533 states to 448533 states and 2133545 transitions. [2021-06-05 15:31:58,341 INFO L78 Accepts]: Start accepts. Automaton has 448533 states and 2133545 transitions. Word has length 40 [2021-06-05 15:31:58,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:58,341 INFO L482 AbstractCegarLoop]: Abstraction has 448533 states and 2133545 transitions. [2021-06-05 15:31:58,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:58,341 INFO L276 IsEmpty]: Start isEmpty. Operand 448533 states and 2133545 transitions. [2021-06-05 15:32:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:32:01,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:01,255 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:32:01,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:32:01,470 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:01,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1291496032, now seen corresponding path program 17 times [2021-06-05 15:32:01,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:01,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578389211] [2021-06-05 15:32:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:32:01,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:01,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578389211] [2021-06-05 15:32:01,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578389211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:01,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965651158] [2021-06-05 15:32:01,557 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 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 15:32:01,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:32:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:01,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:32:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:32:01,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965651158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:01,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:01,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 15:32:01,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490691848] [2021-06-05 15:32:01,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:32:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:32:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:32:01,748 INFO L87 Difference]: Start difference. First operand 448533 states and 2133545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 15:32:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:22,656 INFO L93 Difference]: Finished difference Result 1565237 states and 7251935 transitions. [2021-06-05 15:32:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:32:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 40 [2021-06-05 15:32:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:33,728 INFO L225 Difference]: With dead ends: 1565237 [2021-06-05 15:32:33,729 INFO L226 Difference]: Without dead ends: 1521056 [2021-06-05 15:32:33,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 978.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=4574, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:32:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521056 states. [2021-06-05 15:33:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521056 to 810028. [2021-06-05 15:33:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810028 states, 810027 states have (on average 4.736152004809716) internal successors, (3836411), 810027 states have internal predecessors, (3836411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810028 states to 810028 states and 3836411 transitions. [2021-06-05 15:33:19,003 INFO L78 Accepts]: Start accepts. Automaton has 810028 states and 3836411 transitions. Word has length 40 [2021-06-05 15:33:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:19,003 INFO L482 AbstractCegarLoop]: Abstraction has 810028 states and 3836411 transitions. [2021-06-05 15:33:19,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 15:33:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 810028 states and 3836411 transitions. [2021-06-05 15:33:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:33:24,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:24,834 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 15:33:25,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:25,063 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1485289540, now seen corresponding path program 18 times [2021-06-05 15:33:25,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:25,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806739506] [2021-06-05 15:33:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:33:25,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806739506] [2021-06-05 15:33:25,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806739506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132706312] [2021-06-05 15:33:25,133 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 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 15:33:25,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:33:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:25,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:33:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:33:25,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132706312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:25,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:25,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 15:33:25,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638168279] [2021-06-05 15:33:25,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:33:25,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:25,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:33:25,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:33:25,312 INFO L87 Difference]: Start difference. First operand 810028 states and 3836411 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)