/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:59:09,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:59:09,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:59:09,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:59:09,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:59:09,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:59:09,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:59:09,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:59:09,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:59:09,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:59:09,643 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:59:09,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:59:09,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:59:09,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:59:09,645 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:59:09,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:59:09,646 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:59:09,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:59:09,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:59:09,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:59:09,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:59:09,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:59:09,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:59:09,647 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:59:09,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:59:09,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:59:09,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:59:09,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:59:09,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:59:09,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:59:09,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:59:09,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:59:09,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:59:09,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:59:09,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:59:09,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:59:09,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:59:09,649 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:59:09,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:59:09,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:59:09,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:59:09,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:59:09,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:59:10,000 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:59:10,002 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:59:10,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2021-06-12 20:59:10,003 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2021-06-12 20:59:10,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:59:10,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:59:10,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:59:10,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:59:10,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:59:10,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:59:10,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:59:10,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:59:10,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:59:10,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/1) ... [2021-06-12 20:59:10,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:59:10,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:59:10,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:59:10,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:59:10,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (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 [2021-06-12 20:59:10,171 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:59:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:59:10,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:59:10,172 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:59:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:59:10,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:59:10,172 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:59:10,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:59:10,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:59:10,173 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:59:10,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:59:10,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:59:10,173 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:59:10,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:59:10,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:59:10,173 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-12 20:59:10,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-12 20:59:10,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-12 20:59:10,174 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:59:10,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:59:10,358 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:59:10,360 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:59:10 BoogieIcfgContainer [2021-06-12 20:59:10,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:59:10,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:59:10,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:59:10,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:59:10,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:59:10" (1/2) ... [2021-06-12 20:59:10,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c68cfc1 and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:59:10, skipping insertion in model container [2021-06-12 20:59:10,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:59:10" (2/2) ... [2021-06-12 20:59:10,366 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2021-06-12 20:59:10,371 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:59:10,371 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:59:10,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:59:10,372 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:59:10,422 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-06-12 20:59:10,439 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-12 20:59:10,455 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:59:10,455 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:59:10,455 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:59:10,456 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:59:10,456 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:59:10,456 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:59:10,456 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:59:10,456 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:59:10,465 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 42 transitions, 124 flow [2021-06-12 20:59:10,714 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:59:10,759 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:10,760 INFO L472 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] [2021-06-12 20:59:10,761 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:10,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1892590590, now seen corresponding path program 1 times [2021-06-12 20:59:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:10,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943950874] [2021-06-12 20:59:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:10,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:10,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943950874] [2021-06-12 20:59:10,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943950874] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:10,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:10,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:59:10,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283962896] [2021-06-12 20:59:10,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:10,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:11,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:11,022 INFO L87 Difference]: Start difference. First operand has 2848 states, 2846 states have (on average 4.6394940267041465) internal successors, (13204), 2847 states have internal predecessors, (13204), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:11,444 INFO L93 Difference]: Finished difference Result 13093 states and 60005 transitions. [2021-06-12 20:59:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:59:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:11,568 INFO L225 Difference]: With dead ends: 13093 [2021-06-12 20:59:11,568 INFO L226 Difference]: Without dead ends: 8907 [2021-06-12 20:59:11,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-06-12 20:59:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 3875. [2021-06-12 20:59:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.593959731543624) internal successors, (17797), 3874 states have internal predecessors, (17797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17797 transitions. [2021-06-12 20:59:11,971 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17797 transitions. Word has length 27 [2021-06-12 20:59:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:11,972 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17797 transitions. [2021-06-12 20:59:11,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:11,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17797 transitions. [2021-06-12 20:59:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:59:11,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:11,988 INFO L472 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] [2021-06-12 20:59:11,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:59:11,988 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash 358064054, now seen corresponding path program 2 times [2021-06-12 20:59:11,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:11,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896580225] [2021-06-12 20:59:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:12,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:12,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896580225] [2021-06-12 20:59:12,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896580225] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:12,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:12,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:12,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66120049] [2021-06-12 20:59:12,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:12,048 INFO L87 Difference]: Start difference. First operand 3875 states and 17797 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:12,170 INFO L93 Difference]: Finished difference Result 4814 states and 21965 transitions. [2021-06-12 20:59:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:59:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:12,196 INFO L225 Difference]: With dead ends: 4814 [2021-06-12 20:59:12,196 INFO L226 Difference]: Without dead ends: 3427 [2021-06-12 20:59:12,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-06-12 20:59:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2021-06-12 20:59:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.5128429655575015) internal successors, (15461), 3426 states have internal predecessors, (15461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 15461 transitions. [2021-06-12 20:59:12,432 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 15461 transitions. Word has length 27 [2021-06-12 20:59:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:12,433 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 15461 transitions. [2021-06-12 20:59:12,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 15461 transitions. [2021-06-12 20:59:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:59:12,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:12,446 INFO L472 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] [2021-06-12 20:59:12,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:59:12,446 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1343966654, now seen corresponding path program 3 times [2021-06-12 20:59:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:12,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126628496] [2021-06-12 20:59:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:12,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:12,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126628496] [2021-06-12 20:59:12,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126628496] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:12,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:12,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:59:12,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209622359] [2021-06-12 20:59:12,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:12,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:12,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:12,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:12,490 INFO L87 Difference]: Start difference. First operand 3427 states and 15461 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:12,703 INFO L93 Difference]: Finished difference Result 13141 states and 59505 transitions. [2021-06-12 20:59:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:12,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:59:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:12,749 INFO L225 Difference]: With dead ends: 13141 [2021-06-12 20:59:12,749 INFO L226 Difference]: Without dead ends: 9627 [2021-06-12 20:59:12,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-06-12 20:59:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 3610. [2021-06-12 20:59:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 4.5259074535882515) internal successors, (16334), 3609 states have internal predecessors, (16334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 16334 transitions. [2021-06-12 20:59:12,990 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 16334 transitions. Word has length 27 [2021-06-12 20:59:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:12,991 INFO L482 AbstractCegarLoop]: Abstraction has 3610 states and 16334 transitions. [2021-06-12 20:59:12,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 16334 transitions. [2021-06-12 20:59:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:59:13,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:13,003 INFO L472 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] [2021-06-12 20:59:13,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:59:13,004 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2077293150, now seen corresponding path program 4 times [2021-06-12 20:59:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:13,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78584204] [2021-06-12 20:59:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:13,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:13,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78584204] [2021-06-12 20:59:13,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78584204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:13,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:13,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:13,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25636563] [2021-06-12 20:59:13,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:13,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:13,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:13,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:13,038 INFO L87 Difference]: Start difference. First operand 3610 states and 16334 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:13,075 INFO L93 Difference]: Finished difference Result 4293 states and 19350 transitions. [2021-06-12 20:59:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:59:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:13,089 INFO L225 Difference]: With dead ends: 4293 [2021-06-12 20:59:13,090 INFO L226 Difference]: Without dead ends: 3354 [2021-06-12 20:59:13,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-06-12 20:59:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3354. [2021-06-12 20:59:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 4.470623322397853) internal successors, (14990), 3353 states have internal predecessors, (14990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 14990 transitions. [2021-06-12 20:59:13,256 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 14990 transitions. Word has length 27 [2021-06-12 20:59:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:13,257 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 14990 transitions. [2021-06-12 20:59:13,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 14990 transitions. [2021-06-12 20:59:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:13,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:13,270 INFO L472 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] [2021-06-12 20:59:13,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:59:13,270 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash 327705852, now seen corresponding path program 1 times [2021-06-12 20:59:13,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:13,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625574918] [2021-06-12 20:59:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:13,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625574918] [2021-06-12 20:59:13,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625574918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:13,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727256094] [2021-06-12 20:59:13,362 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 [2021-06-12 20:59:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:59:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:13,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727256094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:13,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:13,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 20:59:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187577402] [2021-06-12 20:59:13,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:59:13,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:59:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:13,591 INFO L87 Difference]: Start difference. First operand 3354 states and 14990 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:13,705 INFO L93 Difference]: Finished difference Result 6670 states and 29656 transitions. [2021-06-12 20:59:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:59:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:13,737 INFO L225 Difference]: With dead ends: 6670 [2021-06-12 20:59:13,737 INFO L226 Difference]: Without dead ends: 6670 [2021-06-12 20:59:13,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2021-06-12 20:59:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4206. [2021-06-12 20:59:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 4.520332936979786) internal successors, (19008), 4205 states have internal predecessors, (19008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 19008 transitions. [2021-06-12 20:59:13,981 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 19008 transitions. Word has length 29 [2021-06-12 20:59:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:13,981 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 19008 transitions. [2021-06-12 20:59:13,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 19008 transitions. [2021-06-12 20:59:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:14,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:14,000 INFO L472 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] [2021-06-12 20:59:14,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:14,217 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash -804997632, now seen corresponding path program 1 times [2021-06-12 20:59:14,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:14,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103325387] [2021-06-12 20:59:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:14,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:14,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103325387] [2021-06-12 20:59:14,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103325387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:14,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388671019] [2021-06-12 20:59:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:59:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388671019] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:14,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 20:59:14,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-12 20:59:14,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747821874] [2021-06-12 20:59:14,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:14,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:14,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:14,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:14,449 INFO L87 Difference]: Start difference. First operand 4206 states and 19008 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:14,525 INFO L93 Difference]: Finished difference Result 5618 states and 25299 transitions. [2021-06-12 20:59:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:14,550 INFO L225 Difference]: With dead ends: 5618 [2021-06-12 20:59:14,550 INFO L226 Difference]: Without dead ends: 5418 [2021-06-12 20:59:14,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-06-12 20:59:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4426. [2021-06-12 20:59:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 4.55864406779661) internal successors, (20172), 4425 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 20172 transitions. [2021-06-12 20:59:14,763 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 20172 transitions. Word has length 29 [2021-06-12 20:59:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:14,763 INFO L482 AbstractCegarLoop]: Abstraction has 4426 states and 20172 transitions. [2021-06-12 20:59:14,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 20172 transitions. [2021-06-12 20:59:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:14,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:14,775 INFO L472 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] [2021-06-12 20:59:14,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:14,989 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1698649094, now seen corresponding path program 1 times [2021-06-12 20:59:14,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:14,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960850599] [2021-06-12 20:59:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:15,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:15,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960850599] [2021-06-12 20:59:15,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960850599] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:15,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:15,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:15,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214171754] [2021-06-12 20:59:15,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:15,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:15,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:15,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:15,036 INFO L87 Difference]: Start difference. First operand 4426 states and 20172 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:15,142 INFO L93 Difference]: Finished difference Result 7946 states and 35321 transitions. [2021-06-12 20:59:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:15,174 INFO L225 Difference]: With dead ends: 7946 [2021-06-12 20:59:15,175 INFO L226 Difference]: Without dead ends: 7848 [2021-06-12 20:59:15,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-06-12 20:59:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 6434. [2021-06-12 20:59:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 4.542048810819214) internal successors, (29219), 6433 states have internal predecessors, (29219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 29219 transitions. [2021-06-12 20:59:15,388 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 29219 transitions. Word has length 29 [2021-06-12 20:59:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:15,388 INFO L482 AbstractCegarLoop]: Abstraction has 6434 states and 29219 transitions. [2021-06-12 20:59:15,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 29219 transitions. [2021-06-12 20:59:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:15,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:15,407 INFO L472 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] [2021-06-12 20:59:15,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:59:15,408 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2054616512, now seen corresponding path program 1 times [2021-06-12 20:59:15,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:15,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330248039] [2021-06-12 20:59:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:15,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330248039] [2021-06-12 20:59:15,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330248039] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:15,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:15,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:15,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424422937] [2021-06-12 20:59:15,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:15,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:15,461 INFO L87 Difference]: Start difference. First operand 6434 states and 29219 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:15,580 INFO L93 Difference]: Finished difference Result 11319 states and 50308 transitions. [2021-06-12 20:59:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:15,628 INFO L225 Difference]: With dead ends: 11319 [2021-06-12 20:59:15,628 INFO L226 Difference]: Without dead ends: 11198 [2021-06-12 20:59:15,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2021-06-12 20:59:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 8925. [2021-06-12 20:59:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 4.6001792917974) internal successors, (41052), 8924 states have internal predecessors, (41052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 41052 transitions. [2021-06-12 20:59:15,967 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 41052 transitions. Word has length 29 [2021-06-12 20:59:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:15,967 INFO L482 AbstractCegarLoop]: Abstraction has 8925 states and 41052 transitions. [2021-06-12 20:59:15,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 41052 transitions. [2021-06-12 20:59:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:15,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:15,993 INFO L472 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] [2021-06-12 20:59:15,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:59:15,993 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:15,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1727440508, now seen corresponding path program 2 times [2021-06-12 20:59:15,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:15,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060553603] [2021-06-12 20:59:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:16,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:16,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060553603] [2021-06-12 20:59:16,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060553603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:16,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524673096] [2021-06-12 20:59:16,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:16,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:59:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:16,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524673096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:16,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:16,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-12 20:59:16,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669253681] [2021-06-12 20:59:16,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:16,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:16,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:16,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:16,200 INFO L87 Difference]: Start difference. First operand 8925 states and 41052 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:17,140 INFO L93 Difference]: Finished difference Result 31957 states and 138250 transitions. [2021-06-12 20:59:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:59:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:17,250 INFO L225 Difference]: With dead ends: 31957 [2021-06-12 20:59:17,251 INFO L226 Difference]: Without dead ends: 25190 [2021-06-12 20:59:17,251 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:59:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25190 states. [2021-06-12 20:59:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25190 to 11186. [2021-06-12 20:59:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11186 states, 11185 states have (on average 4.569959767545821) internal successors, (51115), 11185 states have internal predecessors, (51115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 51115 transitions. [2021-06-12 20:59:17,936 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 51115 transitions. Word has length 29 [2021-06-12 20:59:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:17,936 INFO L482 AbstractCegarLoop]: Abstraction has 11186 states and 51115 transitions. [2021-06-12 20:59:17,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 51115 transitions. [2021-06-12 20:59:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:17,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:17,966 INFO L472 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] [2021-06-12 20:59:18,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:18,188 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -187895172, now seen corresponding path program 2 times [2021-06-12 20:59:18,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:18,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357902420] [2021-06-12 20:59:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:18,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:18,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357902420] [2021-06-12 20:59:18,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357902420] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:18,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:18,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:18,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900855827] [2021-06-12 20:59:18,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:18,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:18,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:18,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:18,234 INFO L87 Difference]: Start difference. First operand 11186 states and 51115 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:18,358 INFO L93 Difference]: Finished difference Result 13521 states and 60589 transitions. [2021-06-12 20:59:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:18,579 INFO L225 Difference]: With dead ends: 13521 [2021-06-12 20:59:18,579 INFO L226 Difference]: Without dead ends: 13281 [2021-06-12 20:59:18,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2021-06-12 20:59:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 11164. [2021-06-12 20:59:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11164 states, 11163 states have (on average 4.55361461972588) internal successors, (50832), 11163 states have internal predecessors, (50832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11164 states to 11164 states and 50832 transitions. [2021-06-12 20:59:19,035 INFO L78 Accepts]: Start accepts. Automaton has 11164 states and 50832 transitions. Word has length 29 [2021-06-12 20:59:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:19,036 INFO L482 AbstractCegarLoop]: Abstraction has 11164 states and 50832 transitions. [2021-06-12 20:59:19,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 11164 states and 50832 transitions. [2021-06-12 20:59:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:19,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:19,064 INFO L472 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] [2021-06-12 20:59:19,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 20:59:19,064 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash -439577730, now seen corresponding path program 2 times [2021-06-12 20:59:19,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:19,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504480925] [2021-06-12 20:59:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:19,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:19,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504480925] [2021-06-12 20:59:19,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504480925] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:19,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:19,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991148640] [2021-06-12 20:59:19,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:19,103 INFO L87 Difference]: Start difference. First operand 11164 states and 50832 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:19,197 INFO L93 Difference]: Finished difference Result 12568 states and 55860 transitions. [2021-06-12 20:59:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:59:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:19,230 INFO L225 Difference]: With dead ends: 12568 [2021-06-12 20:59:19,231 INFO L226 Difference]: Without dead ends: 12568 [2021-06-12 20:59:19,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12568 states. [2021-06-12 20:59:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12568 to 10980. [2021-06-12 20:59:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 4.559340559249477) internal successors, (50057), 10979 states have internal predecessors, (50057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 50057 transitions. [2021-06-12 20:59:19,719 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 50057 transitions. Word has length 29 [2021-06-12 20:59:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:19,720 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 50057 transitions. [2021-06-12 20:59:19,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 50057 transitions. [2021-06-12 20:59:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:19,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:19,864 INFO L472 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] [2021-06-12 20:59:19,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 20:59:19,864 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1843096386, now seen corresponding path program 3 times [2021-06-12 20:59:19,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:19,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378327765] [2021-06-12 20:59:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:19,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:19,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378327765] [2021-06-12 20:59:19,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378327765] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:19,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:19,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:19,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082027828] [2021-06-12 20:59:19,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:19,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:19,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:19,900 INFO L87 Difference]: Start difference. First operand 10980 states and 50057 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:20,013 INFO L93 Difference]: Finished difference Result 13957 states and 62115 transitions. [2021-06-12 20:59:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:59:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:20,056 INFO L225 Difference]: With dead ends: 13957 [2021-06-12 20:59:20,056 INFO L226 Difference]: Without dead ends: 13957 [2021-06-12 20:59:20,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13957 states. [2021-06-12 20:59:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13957 to 11348. [2021-06-12 20:59:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11348 states, 11347 states have (on average 4.560324314796863) internal successors, (51746), 11347 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11348 states to 11348 states and 51746 transitions. [2021-06-12 20:59:20,464 INFO L78 Accepts]: Start accepts. Automaton has 11348 states and 51746 transitions. Word has length 29 [2021-06-12 20:59:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:20,465 INFO L482 AbstractCegarLoop]: Abstraction has 11348 states and 51746 transitions. [2021-06-12 20:59:20,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 11348 states and 51746 transitions. [2021-06-12 20:59:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:20,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:20,487 INFO L472 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] [2021-06-12 20:59:20,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 20:59:20,487 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:20,487 INFO L82 PathProgramCache]: Analyzing trace with hash 266466850, now seen corresponding path program 4 times [2021-06-12 20:59:20,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:20,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946253130] [2021-06-12 20:59:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:20,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946253130] [2021-06-12 20:59:20,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946253130] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:20,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:20,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:59:20,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995988433] [2021-06-12 20:59:20,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:20,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:20,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:20,515 INFO L87 Difference]: Start difference. First operand 11348 states and 51746 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:20,645 INFO L93 Difference]: Finished difference Result 15992 states and 69373 transitions. [2021-06-12 20:59:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:20,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:20,852 INFO L225 Difference]: With dead ends: 15992 [2021-06-12 20:59:20,852 INFO L226 Difference]: Without dead ends: 15751 [2021-06-12 20:59:20,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2021-06-12 20:59:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 11284. [2021-06-12 20:59:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 11283 states have (on average 4.5284055658955955) internal successors, (51094), 11283 states have internal predecessors, (51094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 51094 transitions. [2021-06-12 20:59:21,274 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 51094 transitions. Word has length 29 [2021-06-12 20:59:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:21,274 INFO L482 AbstractCegarLoop]: Abstraction has 11284 states and 51094 transitions. [2021-06-12 20:59:21,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 51094 transitions. [2021-06-12 20:59:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:21,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:21,298 INFO L472 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] [2021-06-12 20:59:21,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 20:59:21,298 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1522958180, now seen corresponding path program 2 times [2021-06-12 20:59:21,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:21,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937704493] [2021-06-12 20:59:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:21,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937704493] [2021-06-12 20:59:21,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937704493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:21,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327033669] [2021-06-12 20:59:21,381 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 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 [2021-06-12 20:59:21,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:21,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:21,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:59:21,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:21,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327033669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:21,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:21,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-12 20:59:21,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252095303] [2021-06-12 20:59:21,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:21,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:21,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:21,482 INFO L87 Difference]: Start difference. First operand 11284 states and 51094 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:22,566 INFO L93 Difference]: Finished difference Result 34532 states and 153051 transitions. [2021-06-12 20:59:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:59:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:22,618 INFO L225 Difference]: With dead ends: 34532 [2021-06-12 20:59:22,619 INFO L226 Difference]: Without dead ends: 15158 [2021-06-12 20:59:22,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:59:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15158 states. [2021-06-12 20:59:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15158 to 6407. [2021-06-12 20:59:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 6406 states have (on average 4.431002185451139) internal successors, (28385), 6406 states have internal predecessors, (28385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 28385 transitions. [2021-06-12 20:59:22,968 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 28385 transitions. Word has length 29 [2021-06-12 20:59:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:22,969 INFO L482 AbstractCegarLoop]: Abstraction has 6407 states and 28385 transitions. [2021-06-12 20:59:22,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 28385 transitions. [2021-06-12 20:59:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:22,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:22,982 INFO L472 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] [2021-06-12 20:59:23,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:23,189 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:23,190 INFO L82 PathProgramCache]: Analyzing trace with hash 291794052, now seen corresponding path program 3 times [2021-06-12 20:59:23,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:23,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773666503] [2021-06-12 20:59:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:23,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773666503] [2021-06-12 20:59:23,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773666503] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:23,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:23,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:59:23,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714165037] [2021-06-12 20:59:23,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:59:23,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:23,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:59:23,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:59:23,215 INFO L87 Difference]: Start difference. First operand 6407 states and 28385 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:23,281 INFO L93 Difference]: Finished difference Result 6967 states and 30444 transitions. [2021-06-12 20:59:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:59:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:23,297 INFO L225 Difference]: With dead ends: 6967 [2021-06-12 20:59:23,297 INFO L226 Difference]: Without dead ends: 6541 [2021-06-12 20:59:23,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2021-06-12 20:59:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 5575. [2021-06-12 20:59:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.463939720129171) internal successors, (24882), 5574 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 24882 transitions. [2021-06-12 20:59:23,405 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 24882 transitions. Word has length 29 [2021-06-12 20:59:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:23,405 INFO L482 AbstractCegarLoop]: Abstraction has 5575 states and 24882 transitions. [2021-06-12 20:59:23,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 24882 transitions. [2021-06-12 20:59:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:59:23,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:23,414 INFO L472 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] [2021-06-12 20:59:23,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-12 20:59:23,415 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:23,415 INFO L82 PathProgramCache]: Analyzing trace with hash 504381606, now seen corresponding path program 5 times [2021-06-12 20:59:23,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:23,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925644706] [2021-06-12 20:59:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:23,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:23,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925644706] [2021-06-12 20:59:23,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925644706] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:59:23,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:59:23,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:59:23,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018775217] [2021-06-12 20:59:23,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:59:23,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:59:23,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:59:23,443 INFO L87 Difference]: Start difference. First operand 5575 states and 24882 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:23,599 INFO L93 Difference]: Finished difference Result 5778 states and 25550 transitions. [2021-06-12 20:59:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:59:23,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:59:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:23,612 INFO L225 Difference]: With dead ends: 5778 [2021-06-12 20:59:23,612 INFO L226 Difference]: Without dead ends: 5413 [2021-06-12 20:59:23,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-12 20:59:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 5186. [2021-06-12 20:59:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 5185 states have (on average 4.515911282545805) internal successors, (23415), 5185 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 23415 transitions. [2021-06-12 20:59:23,706 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 23415 transitions. Word has length 29 [2021-06-12 20:59:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:23,706 INFO L482 AbstractCegarLoop]: Abstraction has 5186 states and 23415 transitions. [2021-06-12 20:59:23,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 23415 transitions. [2021-06-12 20:59:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:59:23,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:23,718 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:23,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 20:59:23,718 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:23,718 INFO L82 PathProgramCache]: Analyzing trace with hash 5948864, now seen corresponding path program 1 times [2021-06-12 20:59:23,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:23,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778818234] [2021-06-12 20:59:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:23,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:23,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778818234] [2021-06-12 20:59:23,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778818234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:23,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614496729] [2021-06-12 20:59:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:59:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:59:23,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:23,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614496729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:23,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:23,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 10 [2021-06-12 20:59:23,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082528542] [2021-06-12 20:59:23,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:23,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:23,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:23,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:23,950 INFO L87 Difference]: Start difference. First operand 5186 states and 23415 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:24,993 INFO L93 Difference]: Finished difference Result 18525 states and 84293 transitions. [2021-06-12 20:59:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:59:24,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 20:59:24,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:25,026 INFO L225 Difference]: With dead ends: 18525 [2021-06-12 20:59:25,026 INFO L226 Difference]: Without dead ends: 11569 [2021-06-12 20:59:25,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:59:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2021-06-12 20:59:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 6899. [2021-06-12 20:59:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6898 states have (on average 4.447521020585677) internal successors, (30679), 6898 states have internal predecessors, (30679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30679 transitions. [2021-06-12 20:59:25,227 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30679 transitions. Word has length 33 [2021-06-12 20:59:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:25,227 INFO L482 AbstractCegarLoop]: Abstraction has 6899 states and 30679 transitions. [2021-06-12 20:59:25,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30679 transitions. [2021-06-12 20:59:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:25,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:25,240 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:25,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:59:25,441 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash -356412096, now seen corresponding path program 1 times [2021-06-12 20:59:25,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:25,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409679511] [2021-06-12 20:59:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:25,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409679511] [2021-06-12 20:59:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409679511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114422067] [2021-06-12 20:59:25,543 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 [2021-06-12 20:59:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:59:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:25,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:59:25,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:25,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:25,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:25,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:59:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:25,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114422067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:25,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:25,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 20:59:25,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345790407] [2021-06-12 20:59:25,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:59:25,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:59:25,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:59:25,772 INFO L87 Difference]: Start difference. First operand 6899 states and 30679 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:25,929 INFO L93 Difference]: Finished difference Result 13711 states and 61754 transitions. [2021-06-12 20:59:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 20:59:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:25,949 INFO L225 Difference]: With dead ends: 13711 [2021-06-12 20:59:25,949 INFO L226 Difference]: Without dead ends: 8117 [2021-06-12 20:59:25,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-12 20:59:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6184. [2021-06-12 20:59:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 4.44088630114831) internal successors, (27458), 6183 states have internal predecessors, (27458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 27458 transitions. [2021-06-12 20:59:26,070 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 27458 transitions. Word has length 35 [2021-06-12 20:59:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:26,070 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 27458 transitions. [2021-06-12 20:59:26,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 27458 transitions. [2021-06-12 20:59:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:26,082 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:26,082 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:26,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:59:26,282 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:26,283 INFO L82 PathProgramCache]: Analyzing trace with hash -427040094, now seen corresponding path program 2 times [2021-06-12 20:59:26,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:26,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294742610] [2021-06-12 20:59:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:26,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:26,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294742610] [2021-06-12 20:59:26,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294742610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:26,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556870845] [2021-06-12 20:59:26,386 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 [2021-06-12 20:59:26,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:26,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:59:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:26,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:59:26,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:26,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:26,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:26,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:59:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:26,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556870845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:26,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:26,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 20:59:26,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317670961] [2021-06-12 20:59:26,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:26,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:26,537 INFO L87 Difference]: Start difference. First operand 6184 states and 27458 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:26,999 INFO L93 Difference]: Finished difference Result 16542 states and 75355 transitions. [2021-06-12 20:59:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:59:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 20:59:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:27,021 INFO L225 Difference]: With dead ends: 16542 [2021-06-12 20:59:27,021 INFO L226 Difference]: Without dead ends: 9202 [2021-06-12 20:59:27,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:59:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-06-12 20:59:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6580. [2021-06-12 20:59:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 6579 states have (on average 4.455692354461164) internal successors, (29314), 6579 states have internal predecessors, (29314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 29314 transitions. [2021-06-12 20:59:27,138 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 29314 transitions. Word has length 35 [2021-06-12 20:59:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:27,138 INFO L482 AbstractCegarLoop]: Abstraction has 6580 states and 29314 transitions. [2021-06-12 20:59:27,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 29314 transitions. [2021-06-12 20:59:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:27,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:27,149 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:27,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:27,351 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash -277867294, now seen corresponding path program 3 times [2021-06-12 20:59:27,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:27,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824188372] [2021-06-12 20:59:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:27,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:27,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824188372] [2021-06-12 20:59:27,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824188372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:27,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597588697] [2021-06-12 20:59:27,487 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 [2021-06-12 20:59:27,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:59:27,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:59:27,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:27,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-12 20:59:27,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:27,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:27,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:27,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 20:59:27,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-06-12 20:59:27,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:27,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:27,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:27,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-06-12 20:59:27,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:59:27,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:27,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:27,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:27,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:59:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:27,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597588697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:27,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:27,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 20:59:27,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629154733] [2021-06-12 20:59:27,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:59:27,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:27,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:59:27,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:59:27,676 INFO L87 Difference]: Start difference. First operand 6580 states and 29314 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:27,990 INFO L93 Difference]: Finished difference Result 12638 states and 57079 transitions. [2021-06-12 20:59:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:59:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 20:59:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:28,011 INFO L225 Difference]: With dead ends: 12638 [2021-06-12 20:59:28,012 INFO L226 Difference]: Without dead ends: 6958 [2021-06-12 20:59:28,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:59:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2021-06-12 20:59:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6767. [2021-06-12 20:59:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 4.428909252143068) internal successors, (29966), 6766 states have internal predecessors, (29966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 29966 transitions. [2021-06-12 20:59:28,202 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 29966 transitions. Word has length 35 [2021-06-12 20:59:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:28,203 INFO L482 AbstractCegarLoop]: Abstraction has 6767 states and 29966 transitions. [2021-06-12 20:59:28,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 29966 transitions. [2021-06-12 20:59:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:28,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:28,215 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:28,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:28,416 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:28,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1166208778, now seen corresponding path program 4 times [2021-06-12 20:59:28,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:28,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128066019] [2021-06-12 20:59:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:28,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128066019] [2021-06-12 20:59:28,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128066019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547644241] [2021-06-12 20:59:28,548 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 [2021-06-12 20:59:28,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:59:28,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:59:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:28,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-12 20:59:28,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:28,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:28,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:28,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-12 20:59:28,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2021-06-12 20:59:28,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:28,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:28,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:28,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:16 [2021-06-12 20:59:28,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:59:28,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:28,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:28,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:28,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:59:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:28,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547644241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:28,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:28,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 20:59:28,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36699058] [2021-06-12 20:59:28,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:59:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:59:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:59:28,818 INFO L87 Difference]: Start difference. First operand 6767 states and 29966 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:29,222 INFO L93 Difference]: Finished difference Result 16561 states and 74831 transitions. [2021-06-12 20:59:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:59:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 20:59:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:29,240 INFO L225 Difference]: With dead ends: 16561 [2021-06-12 20:59:29,240 INFO L226 Difference]: Without dead ends: 6962 [2021-06-12 20:59:29,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:59:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2021-06-12 20:59:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6907. [2021-06-12 20:59:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 4.406602953953084) internal successors, (30432), 6906 states have internal predecessors, (30432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:29,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 30432 transitions. [2021-06-12 20:59:29,353 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 30432 transitions. Word has length 35 [2021-06-12 20:59:29,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:29,353 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 30432 transitions. [2021-06-12 20:59:29,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 30432 transitions. [2021-06-12 20:59:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:29,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:29,364 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:29,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:29,566 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1739465236, now seen corresponding path program 5 times [2021-06-12 20:59:29,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:29,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461705244] [2021-06-12 20:59:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:29,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:29,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461705244] [2021-06-12 20:59:29,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461705244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:29,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929946178] [2021-06-12 20:59:29,692 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 [2021-06-12 20:59:29,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:59:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:29,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:59:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:29,966 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-06-12 20:59:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 28 [2021-06-12 20:59:29,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:59:30,015 INFO L628 ElimStorePlain]: treesize reduction 15, result has 66.7 percent of original size [2021-06-12 20:59:30,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-12 20:59:30,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-06-12 20:59:30,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:30,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-12 20:59:30,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 20:59:30,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:30,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:30,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-12 20:59:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:59:30,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929946178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:30,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:30,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 20:59:30,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9062924] [2021-06-12 20:59:30,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:59:30,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:30,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:59:30,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:59:30,161 INFO L87 Difference]: Start difference. First operand 6907 states and 30432 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:30,815 INFO L93 Difference]: Finished difference Result 20574 states and 92411 transitions. [2021-06-12 20:59:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:59:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 20:59:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:30,849 INFO L225 Difference]: With dead ends: 20574 [2021-06-12 20:59:30,849 INFO L226 Difference]: Without dead ends: 13086 [2021-06-12 20:59:30,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:59:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13086 states. [2021-06-12 20:59:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13086 to 8827. [2021-06-12 20:59:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8827 states, 8826 states have (on average 4.414343983684568) internal successors, (38961), 8826 states have internal predecessors, (38961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8827 states to 8827 states and 38961 transitions. [2021-06-12 20:59:31,033 INFO L78 Accepts]: Start accepts. Automaton has 8827 states and 38961 transitions. Word has length 35 [2021-06-12 20:59:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:31,033 INFO L482 AbstractCegarLoop]: Abstraction has 8827 states and 38961 transitions. [2021-06-12 20:59:31,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 8827 states and 38961 transitions. [2021-06-12 20:59:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:59:31,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:31,047 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:31,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:31,248 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:31,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1637524792, now seen corresponding path program 6 times [2021-06-12 20:59:31,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:31,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812530409] [2021-06-12 20:59:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:31,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812530409] [2021-06-12 20:59:31,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812530409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929857004] [2021-06-12 20:59:31,366 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 [2021-06-12 20:59:31,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:59:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:31,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:59:31,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:31,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-12 20:59:31,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:31,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:31,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:31,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-12 20:59:31,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 20:59:31,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:59:31,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:59:31,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:59:31,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-12 20:59:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:31,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929857004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:31,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:31,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 20:59:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720346994] [2021-06-12 20:59:31,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:59:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:59:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:31,608 INFO L87 Difference]: Start difference. First operand 8827 states and 38961 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:31,959 INFO L93 Difference]: Finished difference Result 18175 states and 81358 transitions. [2021-06-12 20:59:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:59:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 20:59:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:31,998 INFO L225 Difference]: With dead ends: 18175 [2021-06-12 20:59:31,998 INFO L226 Difference]: Without dead ends: 12305 [2021-06-12 20:59:31,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:59:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-06-12 20:59:32,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 8940. [2021-06-12 20:59:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8940 states, 8939 states have (on average 4.425327217809598) internal successors, (39558), 8939 states have internal predecessors, (39558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8940 states to 8940 states and 39558 transitions. [2021-06-12 20:59:32,211 INFO L78 Accepts]: Start accepts. Automaton has 8940 states and 39558 transitions. Word has length 35 [2021-06-12 20:59:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:32,211 INFO L482 AbstractCegarLoop]: Abstraction has 8940 states and 39558 transitions. [2021-06-12 20:59:32,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8940 states and 39558 transitions. [2021-06-12 20:59:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:32,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:32,227 INFO L472 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, 1, 1, 1, 1, 1] [2021-06-12 20:59:32,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 20:59:32,430 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:32,430 INFO L82 PathProgramCache]: Analyzing trace with hash 711566540, now seen corresponding path program 7 times [2021-06-12 20:59:32,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:32,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536528224] [2021-06-12 20:59:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:32,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:32,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536528224] [2021-06-12 20:59:32,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536528224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:32,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040196742] [2021-06-12 20:59:32,483 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 [2021-06-12 20:59:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:32,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:59:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:32,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040196742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:32,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:32,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 20:59:32,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905349792] [2021-06-12 20:59:32,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:32,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:32,586 INFO L87 Difference]: Start difference. First operand 8940 states and 39558 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:32,751 INFO L93 Difference]: Finished difference Result 15793 states and 70284 transitions. [2021-06-12 20:59:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 20:59:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:32,864 INFO L225 Difference]: With dead ends: 15793 [2021-06-12 20:59:32,864 INFO L226 Difference]: Without dead ends: 15704 [2021-06-12 20:59:32,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2021-06-12 20:59:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 12260. [2021-06-12 20:59:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12260 states, 12259 states have (on average 4.546210947059303) internal successors, (55732), 12259 states have internal predecessors, (55732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12260 states to 12260 states and 55732 transitions. [2021-06-12 20:59:33,094 INFO L78 Accepts]: Start accepts. Automaton has 12260 states and 55732 transitions. Word has length 37 [2021-06-12 20:59:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:33,095 INFO L482 AbstractCegarLoop]: Abstraction has 12260 states and 55732 transitions. [2021-06-12 20:59:33,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 12260 states and 55732 transitions. [2021-06-12 20:59:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:33,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:33,117 INFO L472 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, 1, 1, 1, 1, 1] [2021-06-12 20:59:33,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 20:59:33,333 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1970707116, now seen corresponding path program 8 times [2021-06-12 20:59:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:33,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613373633] [2021-06-12 20:59:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:33,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613373633] [2021-06-12 20:59:33,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613373633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48386900] [2021-06-12 20:59:33,459 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 [2021-06-12 20:59:33,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:33,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:33,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48386900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:33,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:33,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 20:59:33,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850969004] [2021-06-12 20:59:33,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:59:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:59:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:33,593 INFO L87 Difference]: Start difference. First operand 12260 states and 55732 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:34,382 INFO L93 Difference]: Finished difference Result 42266 states and 186131 transitions. [2021-06-12 20:59:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:59:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 20:59:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:34,504 INFO L225 Difference]: With dead ends: 42266 [2021-06-12 20:59:34,504 INFO L226 Difference]: Without dead ends: 42266 [2021-06-12 20:59:34,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:59:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42266 states. [2021-06-12 20:59:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42266 to 18104. [2021-06-12 20:59:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18104 states, 18103 states have (on average 4.676959619952494) internal successors, (84667), 18103 states have internal predecessors, (84667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18104 states to 18104 states and 84667 transitions. [2021-06-12 20:59:35,360 INFO L78 Accepts]: Start accepts. Automaton has 18104 states and 84667 transitions. Word has length 37 [2021-06-12 20:59:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:35,361 INFO L482 AbstractCegarLoop]: Abstraction has 18104 states and 84667 transitions. [2021-06-12 20:59:35,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 18104 states and 84667 transitions. [2021-06-12 20:59:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:35,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:35,406 INFO L472 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, 1, 1, 1, 1, 1] [2021-06-12 20:59:35,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:59:35,606 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash -292754666, now seen corresponding path program 9 times [2021-06-12 20:59:35,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:35,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591846686] [2021-06-12 20:59:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:35,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:35,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591846686] [2021-06-12 20:59:35,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591846686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:35,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902145799] [2021-06-12 20:59:35,643 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 [2021-06-12 20:59:35,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:59:35,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:35,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:35,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902145799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:35,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:35,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-12 20:59:35,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280640659] [2021-06-12 20:59:35,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:59:35,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:59:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:59:35,757 INFO L87 Difference]: Start difference. First operand 18104 states and 84667 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:59:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:36,352 INFO L93 Difference]: Finished difference Result 36229 states and 162668 transitions. [2021-06-12 20:59:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:59:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 37 [2021-06-12 20:59:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:36,485 INFO L225 Difference]: With dead ends: 36229 [2021-06-12 20:59:36,486 INFO L226 Difference]: Without dead ends: 36052 [2021-06-12 20:59:36,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:59:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-06-12 20:59:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 20234. [2021-06-12 20:59:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20234 states, 20233 states have (on average 4.776750852567588) internal successors, (96648), 20233 states have internal predecessors, (96648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20234 states to 20234 states and 96648 transitions. [2021-06-12 20:59:37,141 INFO L78 Accepts]: Start accepts. Automaton has 20234 states and 96648 transitions. Word has length 37 [2021-06-12 20:59:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:37,142 INFO L482 AbstractCegarLoop]: Abstraction has 20234 states and 96648 transitions. [2021-06-12 20:59:37,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:59:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 20234 states and 96648 transitions. [2021-06-12 20:59:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:37,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:37,354 INFO L472 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, 1, 1, 1, 1, 1] [2021-06-12 20:59:37,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:37,578 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:37,578 INFO L82 PathProgramCache]: Analyzing trace with hash -757299736, now seen corresponding path program 10 times [2021-06-12 20:59:37,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:37,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709349481] [2021-06-12 20:59:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:37,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709349481] [2021-06-12 20:59:37,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709349481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033507164] [2021-06-12 20:59:37,612 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 [2021-06-12 20:59:37,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:59:37,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:59:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:59:37,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033507164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:37,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:37,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 20:59:37,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608571856] [2021-06-12 20:59:37,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:37,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:37,721 INFO L87 Difference]: Start difference. First operand 20234 states and 96648 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2021-06-12 20:59:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:37,936 INFO L93 Difference]: Finished difference Result 26645 states and 124196 transitions. [2021-06-12 20:59:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2021-06-12 20:59:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:38,016 INFO L225 Difference]: With dead ends: 26645 [2021-06-12 20:59:38,016 INFO L226 Difference]: Without dead ends: 26645 [2021-06-12 20:59:38,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:59:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26645 states. [2021-06-12 20:59:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26645 to 22646. [2021-06-12 20:59:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22646 states, 22645 states have (on average 4.74435857805255) internal successors, (107436), 22645 states have internal predecessors, (107436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22646 states to 22646 states and 107436 transitions. [2021-06-12 20:59:38,896 INFO L78 Accepts]: Start accepts. Automaton has 22646 states and 107436 transitions. Word has length 37 [2021-06-12 20:59:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:38,896 INFO L482 AbstractCegarLoop]: Abstraction has 22646 states and 107436 transitions. [2021-06-12 20:59:38,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2021-06-12 20:59:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 22646 states and 107436 transitions. [2021-06-12 20:59:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:59:38,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:38,939 INFO L472 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, 1, 1, 1, 1, 1] [2021-06-12 20:59:39,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:59:39,140 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:39,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:39,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1051419172, now seen corresponding path program 11 times [2021-06-12 20:59:39,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:39,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905208225] [2021-06-12 20:59:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:39,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:39,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905208225] [2021-06-12 20:59:39,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905208225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:39,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605107468] [2021-06-12 20:59:39,168 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 [2021-06-12 20:59:39,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:59:39,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:59:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:59:39,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605107468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:39,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:39,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 20:59:39,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234625618] [2021-06-12 20:59:39,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:59:39,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:39,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:59:39,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:39,275 INFO L87 Difference]: Start difference. First operand 22646 states and 107436 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:40,212 INFO L93 Difference]: Finished difference Result 70509 states and 338891 transitions. [2021-06-12 20:59:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:59:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 20:59:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:40,697 INFO L225 Difference]: With dead ends: 70509 [2021-06-12 20:59:40,697 INFO L226 Difference]: Without dead ends: 65301 [2021-06-12 20:59:40,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:59:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65301 states. [2021-06-12 20:59:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65301 to 40472. [2021-06-12 20:59:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40472 states, 40471 states have (on average 4.977242964097749) internal successors, (201434), 40471 states have internal predecessors, (201434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40472 states to 40472 states and 201434 transitions. [2021-06-12 20:59:42,186 INFO L78 Accepts]: Start accepts. Automaton has 40472 states and 201434 transitions. Word has length 37 [2021-06-12 20:59:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:42,186 INFO L482 AbstractCegarLoop]: Abstraction has 40472 states and 201434 transitions. [2021-06-12 20:59:42,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 40472 states and 201434 transitions. [2021-06-12 20:59:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:59:42,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:42,602 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:42,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:42,825 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:42,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:42,826 INFO L82 PathProgramCache]: Analyzing trace with hash -211695292, now seen corresponding path program 12 times [2021-06-12 20:59:42,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:42,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780182642] [2021-06-12 20:59:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:42,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780182642] [2021-06-12 20:59:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780182642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683639871] [2021-06-12 20:59:42,852 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 [2021-06-12 20:59:42,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:59:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:42,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:42,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:42,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683639871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:42,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:42,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:59:42,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122831788] [2021-06-12 20:59:42,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:59:42,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:59:42,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:59:42,969 INFO L87 Difference]: Start difference. First operand 40472 states and 201434 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:59:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:44,039 INFO L93 Difference]: Finished difference Result 105615 states and 523706 transitions. [2021-06-12 20:59:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:59:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 39 [2021-06-12 20:59:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:44,834 INFO L225 Difference]: With dead ends: 105615 [2021-06-12 20:59:44,834 INFO L226 Difference]: Without dead ends: 105615 [2021-06-12 20:59:44,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:59:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105615 states. [2021-06-12 20:59:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105615 to 55540. [2021-06-12 20:59:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55540 states, 55539 states have (on average 5.127676047462144) internal successors, (284786), 55539 states have internal predecessors, (284786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55540 states to 55540 states and 284786 transitions. [2021-06-12 20:59:47,234 INFO L78 Accepts]: Start accepts. Automaton has 55540 states and 284786 transitions. Word has length 39 [2021-06-12 20:59:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:47,234 INFO L482 AbstractCegarLoop]: Abstraction has 55540 states and 284786 transitions. [2021-06-12 20:59:47,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:59:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 55540 states and 284786 transitions. [2021-06-12 20:59:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:59:47,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:47,762 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:47,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 20:59:47,962 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:47,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:47,963 INFO L82 PathProgramCache]: Analyzing trace with hash -938689434, now seen corresponding path program 13 times [2021-06-12 20:59:47,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:47,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805071066] [2021-06-12 20:59:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:48,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805071066] [2021-06-12 20:59:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805071066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:48,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227730515] [2021-06-12 20:59:48,012 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 [2021-06-12 20:59:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:48,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:48,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227730515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:48,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:48,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 20:59:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962604988] [2021-06-12 20:59:48,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:59:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:59:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:59:48,109 INFO L87 Difference]: Start difference. First operand 55540 states and 284786 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:49,307 INFO L93 Difference]: Finished difference Result 113105 states and 582051 transitions. [2021-06-12 20:59:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:59:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:59:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:50,181 INFO L225 Difference]: With dead ends: 113105 [2021-06-12 20:59:50,181 INFO L226 Difference]: Without dead ends: 112969 [2021-06-12 20:59:50,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:59:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112969 states. [2021-06-12 20:59:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112969 to 87675. [2021-06-12 20:59:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87675 states, 87674 states have (on average 5.334614594976846) internal successors, (467707), 87674 states have internal predecessors, (467707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87675 states to 87675 states and 467707 transitions. [2021-06-12 20:59:53,758 INFO L78 Accepts]: Start accepts. Automaton has 87675 states and 467707 transitions. Word has length 39 [2021-06-12 20:59:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:59:53,758 INFO L482 AbstractCegarLoop]: Abstraction has 87675 states and 467707 transitions. [2021-06-12 20:59:53,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 87675 states and 467707 transitions. [2021-06-12 20:59:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:59:54,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:59:54,487 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:59:54,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 20:59:54,712 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 20:59:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:59:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -605961626, now seen corresponding path program 14 times [2021-06-12 20:59:54,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:59:54,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759524772] [2021-06-12 20:59:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:59:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:59:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:59:54,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:59:54,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759524772] [2021-06-12 20:59:54,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759524772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:54,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578822502] [2021-06-12 20:59:54,735 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 [2021-06-12 20:59:54,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:59:54,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:59:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:59:54,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:59:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:59:54,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578822502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:59:54,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:59:54,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:59:54,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109457740] [2021-06-12 20:59:54,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:59:54,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:59:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:59:54,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:59:54,814 INFO L87 Difference]: Start difference. First operand 87675 states and 467707 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:59:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:59:56,937 INFO L93 Difference]: Finished difference Result 204587 states and 1085617 transitions. [2021-06-12 20:59:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:59:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:59:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:59:59,323 INFO L225 Difference]: With dead ends: 204587 [2021-06-12 20:59:59,324 INFO L226 Difference]: Without dead ends: 200668 [2021-06-12 20:59:59,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:59:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200668 states. [2021-06-12 21:00:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200668 to 143315. [2021-06-12 21:00:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143315 states, 143314 states have (on average 5.5033771997153105) internal successors, (788711), 143314 states have internal predecessors, (788711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143315 states to 143315 states and 788711 transitions. [2021-06-12 21:00:08,137 INFO L78 Accepts]: Start accepts. Automaton has 143315 states and 788711 transitions. Word has length 39 [2021-06-12 21:00:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:08,137 INFO L482 AbstractCegarLoop]: Abstraction has 143315 states and 788711 transitions. [2021-06-12 21:00:08,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 143315 states and 788711 transitions. [2021-06-12 21:00:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:00:09,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:09,049 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:09,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:00:09,269 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 21:00:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1491063522, now seen corresponding path program 15 times [2021-06-12 21:00:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:09,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594501957] [2021-06-12 21:00:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:00:09,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:09,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594501957] [2021-06-12 21:00:09,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594501957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:09,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315310972] [2021-06-12 21:00:09,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:00:09,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:00:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:00:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:00:09,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315310972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:09,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:09,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 21:00:09,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026166994] [2021-06-12 21:00:09,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:00:09,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:00:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:00:09,432 INFO L87 Difference]: Start difference. First operand 143315 states and 788711 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:00:15,048 INFO L93 Difference]: Finished difference Result 400155 states and 2145783 transitions. [2021-06-12 21:00:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:00:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:00:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:00:17,812 INFO L225 Difference]: With dead ends: 400155 [2021-06-12 21:00:17,812 INFO L226 Difference]: Without dead ends: 380814 [2021-06-12 21:00:17,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:00:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380814 states. [2021-06-12 21:00:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380814 to 289785. [2021-06-12 21:00:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289785 states, 289784 states have (on average 5.571549844021754) internal successors, (1614546), 289784 states have internal predecessors, (1614546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289785 states to 289785 states and 1614546 transitions. [2021-06-12 21:00:37,737 INFO L78 Accepts]: Start accepts. Automaton has 289785 states and 1614546 transitions. Word has length 39 [2021-06-12 21:00:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:00:37,737 INFO L482 AbstractCegarLoop]: Abstraction has 289785 states and 1614546 transitions. [2021-06-12 21:00:37,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:00:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 289785 states and 1614546 transitions. [2021-06-12 21:00:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:00:40,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:00:40,086 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:00:40,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 21:00:40,301 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-12 21:00:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:00:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash 98420402, now seen corresponding path program 16 times [2021-06-12 21:00:40,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:00:40,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164177429] [2021-06-12 21:00:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:00:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:00:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:00:40,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:00:40,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164177429] [2021-06-12 21:00:40,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164177429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:40,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121051542] [2021-06-12 21:00:40,353 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 [2021-06-12 21:00:40,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:00:40,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:00:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:00:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:00:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:00:40,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121051542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:00:40,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:00:40,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 21:00:40,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603237651] [2021-06-12 21:00:40,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:00:40,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:00:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:00:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:00:40,517 INFO L87 Difference]: Start difference. First operand 289785 states and 1614546 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)