/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:08:05,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:08:05,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:08:05,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:08:05,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:08:05,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:08:05,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:08:05,591 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 [2021-06-05 05:08:05,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:08:05,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:08:05,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:08:05,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:08:05,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:08:05,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:08:05,621 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:08:05,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:08:05,621 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:08:05,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:08:05,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:08:05,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:08:05,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:08:05,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:08:05,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:08:05,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:08:05,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:08:05,623 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:08:05,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:08:05,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:08:05,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:08:05,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:08:05,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:08:05,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:08:05,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:08:05,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:08:05,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:08:05,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:08:05,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:08:05,624 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:08:05,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:08:05,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:08:05,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:08:05,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:08:05,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:08:05,935 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:08:05,936 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:08:05,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl [2021-06-05 05:08:05,937 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl' [2021-06-05 05:08:05,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:08:05,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:08:05,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:08:05,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:08:05,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:08:05,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:08:05,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:08:05,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:08:05,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:08:05,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:05,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... [2021-06-05 05:08:06,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:08:06,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:08:06,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:08:06,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:08:06,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:08:06,066 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:08:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:08:06,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:08:06,067 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:08:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:08:06,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:08:06,067 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:08:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:08:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:08:06,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:08:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:08:06,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:08:06,069 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:08:06,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:08:06,208 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:08:06,209 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:08:06 BoogieIcfgContainer [2021-06-05 05:08:06,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:08:06,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:08:06,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:08:06,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:08:06,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:08:05" (1/2) ... [2021-06-05 05:08:06,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c1201e and model type misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:08:06, skipping insertion in model container [2021-06-05 05:08:06,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:08:06" (2/2) ... [2021-06-05 05:08:06,214 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3-extended.wvr.bpl [2021-06-05 05:08:06,233 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:08:06,233 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:08:06,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:08:06,234 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:08:06,275 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 05:08:06,296 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 05:08:06,329 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:08:06,329 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:08:06,329 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:08:06,329 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:08:06,329 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:08:06,329 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:08:06,329 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:08:06,329 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:08:06,336 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 124 flow [2021-06-05 05:08:06,430 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:08:06,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:06,453 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:06,453 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash -932509886, now seen corresponding path program 1 times [2021-06-05 05:08:06,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:06,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572510931] [2021-06-05 05:08:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:06,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:06,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572510931] [2021-06-05 05:08:06,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572510931] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:06,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:06,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:08:06,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012633716] [2021-06-05 05:08:06,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:08:06,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:06,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:08:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:06,570 INFO L87 Difference]: Start difference. First operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:06,606 INFO L93 Difference]: Finished difference Result 1005 states and 3886 transitions. [2021-06-05 05:08:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:08:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 05:08:06,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:06,623 INFO L225 Difference]: With dead ends: 1005 [2021-06-05 05:08:06,623 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 05:08:06,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 05:08:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2021-06-05 05:08:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.8705179282868527) internal successors, (3886), 1004 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3886 transitions. [2021-06-05 05:08:06,699 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3886 transitions. Word has length 15 [2021-06-05 05:08:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:06,700 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3886 transitions. [2021-06-05 05:08:06,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3886 transitions. [2021-06-05 05:08:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:08:06,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:06,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:06,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:08:06,703 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:06,704 INFO L82 PathProgramCache]: Analyzing trace with hash -406691327, now seen corresponding path program 1 times [2021-06-05 05:08:06,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:06,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397676916] [2021-06-05 05:08:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:06,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397676916] [2021-06-05 05:08:06,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397676916] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:06,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:06,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:08:06,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358898016] [2021-06-05 05:08:06,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:08:06,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:06,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:08:06,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:06,724 INFO L87 Difference]: Start difference. First operand 1005 states and 3886 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:06,752 INFO L93 Difference]: Finished difference Result 1114 states and 4276 transitions. [2021-06-05 05:08:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:08:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:08:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:06,759 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 05:08:06,759 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 05:08:06,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 05:08:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-06-05 05:08:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.8418688230008984) internal successors, (4276), 1113 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4276 transitions. [2021-06-05 05:08:06,795 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4276 transitions. Word has length 21 [2021-06-05 05:08:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:06,795 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4276 transitions. [2021-06-05 05:08:06,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4276 transitions. [2021-06-05 05:08:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:08:06,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:06,799 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:06,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:08:06,800 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:06,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2065937446, now seen corresponding path program 1 times [2021-06-05 05:08:06,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:06,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667698283] [2021-06-05 05:08:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:06,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667698283] [2021-06-05 05:08:06,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667698283] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:06,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:06,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:08:06,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387917221] [2021-06-05 05:08:06,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:08:06,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:08:06,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:06,854 INFO L87 Difference]: Start difference. First operand 1114 states and 4276 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) [2021-06-05 05:08:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:06,879 INFO L93 Difference]: Finished difference Result 1550 states and 5618 transitions. [2021-06-05 05:08:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:08:06,881 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 [2021-06-05 05:08:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:06,889 INFO L225 Difference]: With dead ends: 1550 [2021-06-05 05:08:06,891 INFO L226 Difference]: Without dead ends: 1550 [2021-06-05 05:08:06,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-05 05:08:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1550. [2021-06-05 05:08:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.6268560361523563) internal successors, (5618), 1549 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5618 transitions. [2021-06-05 05:08:06,934 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5618 transitions. Word has length 27 [2021-06-05 05:08:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:06,934 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5618 transitions. [2021-06-05 05:08:06,934 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) [2021-06-05 05:08:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5618 transitions. [2021-06-05 05:08:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:08:06,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:06,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:06,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:08:06,939 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:06,940 INFO L82 PathProgramCache]: Analyzing trace with hash -114728766, now seen corresponding path program 1 times [2021-06-05 05:08:06,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:06,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833304481] [2021-06-05 05:08:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:06,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:06,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833304481] [2021-06-05 05:08:06,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833304481] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:06,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:06,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:08:06,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736205444] [2021-06-05 05:08:06,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:08:06,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:06,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:08:06,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:06,983 INFO L87 Difference]: Start difference. First operand 1550 states and 5618 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:06,998 INFO L93 Difference]: Finished difference Result 1705 states and 6135 transitions. [2021-06-05 05:08:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:08:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:08:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:07,006 INFO L225 Difference]: With dead ends: 1705 [2021-06-05 05:08:07,007 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 05:08:07,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 05:08:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2021-06-05 05:08:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.6003521126760565) internal successors, (6135), 1704 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6135 transitions. [2021-06-05 05:08:07,047 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6135 transitions. Word has length 32 [2021-06-05 05:08:07,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:07,048 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 6135 transitions. [2021-06-05 05:08:07,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6135 transitions. [2021-06-05 05:08:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:08:07,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:07,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:07,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:08:07,053 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1356073541, now seen corresponding path program 1 times [2021-06-05 05:08:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:07,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566720763] [2021-06-05 05:08:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:07,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:07,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566720763] [2021-06-05 05:08:07,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566720763] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:07,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:07,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:08:07,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90699701] [2021-06-05 05:08:07,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:08:07,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:07,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:08:07,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:07,102 INFO L87 Difference]: Start difference. First operand 1705 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:07,124 INFO L93 Difference]: Finished difference Result 2170 states and 7686 transitions. [2021-06-05 05:08:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:08:07,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:08:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:07,133 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 05:08:07,133 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 05:08:07,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:08:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 05:08:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2015. [2021-06-05 05:08:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5595829195630584) internal successors, (7169), 2014 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7169 transitions. [2021-06-05 05:08:07,177 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7169 transitions. Word has length 38 [2021-06-05 05:08:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:07,177 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7169 transitions. [2021-06-05 05:08:07,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7169 transitions. [2021-06-05 05:08:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:08:07,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:07,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:07,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:08:07,184 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash 230141437, now seen corresponding path program 1 times [2021-06-05 05:08:07,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:07,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122325664] [2021-06-05 05:08:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:07,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:07,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122325664] [2021-06-05 05:08:07,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122325664] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:07,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:07,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:08:07,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209900791] [2021-06-05 05:08:07,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:08:07,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:08:07,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:07,226 INFO L87 Difference]: Start difference. First operand 2015 states and 7169 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:07,261 INFO L93 Difference]: Finished difference Result 2747 states and 9215 transitions. [2021-06-05 05:08:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:08:07,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:08:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:07,273 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 05:08:07,273 INFO L226 Difference]: Without dead ends: 2747 [2021-06-05 05:08:07,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-06-05 05:08:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-06-05 05:08:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2746 states have (on average 3.3557902403495996) internal successors, (9215), 2746 states have internal predecessors, (9215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 9215 transitions. [2021-06-05 05:08:07,339 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 9215 transitions. Word has length 38 [2021-06-05 05:08:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:07,343 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 9215 transitions. [2021-06-05 05:08:07,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 9215 transitions. [2021-06-05 05:08:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:08:07,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:07,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:07,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 05:08:07,351 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash -76350981, now seen corresponding path program 1 times [2021-06-05 05:08:07,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:07,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932209549] [2021-06-05 05:08:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 05:08:07,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:07,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932209549] [2021-06-05 05:08:07,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932209549] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:08:07,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:08:07,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:08:07,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678286274] [2021-06-05 05:08:07,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:08:07,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:07,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:08:07,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:07,402 INFO L87 Difference]: Start difference. First operand 2747 states and 9215 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:07,444 INFO L93 Difference]: Finished difference Result 3169 states and 10115 transitions. [2021-06-05 05:08:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:08:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:08:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:07,455 INFO L225 Difference]: With dead ends: 3169 [2021-06-05 05:08:07,455 INFO L226 Difference]: Without dead ends: 3169 [2021-06-05 05:08:07,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:08:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-06-05 05:08:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3169. [2021-06-05 05:08:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 3.1928661616161618) internal successors, (10115), 3168 states have internal predecessors, (10115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 10115 transitions. [2021-06-05 05:08:07,517 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 10115 transitions. Word has length 43 [2021-06-05 05:08:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:07,517 INFO L482 AbstractCegarLoop]: Abstraction has 3169 states and 10115 transitions. [2021-06-05 05:08:07,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 10115 transitions. [2021-06-05 05:08:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:07,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:07,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:07,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:08:07,523 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:07,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:07,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2047461749, now seen corresponding path program 1 times [2021-06-05 05:08:07,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:07,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972032492] [2021-06-05 05:08:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:08:07,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972032492] [2021-06-05 05:08:07,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972032492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558381985] [2021-06-05 05:08:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:08:07,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558381985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:07,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:08:07,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367720937] [2021-06-05 05:08:07,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:08:07,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:08:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:08:07,878 INFO L87 Difference]: Start difference. First operand 3169 states and 10115 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:07,926 INFO L93 Difference]: Finished difference Result 5225 states and 16762 transitions. [2021-06-05 05:08:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:08:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:07,950 INFO L225 Difference]: With dead ends: 5225 [2021-06-05 05:08:07,950 INFO L226 Difference]: Without dead ends: 5074 [2021-06-05 05:08:07,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:08:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5074 states. [2021-06-05 05:08:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5074 to 4826. [2021-06-05 05:08:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 3.2426943005181346) internal successors, (15646), 4825 states have internal predecessors, (15646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 15646 transitions. [2021-06-05 05:08:08,054 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 15646 transitions. Word has length 48 [2021-06-05 05:08:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:08,055 INFO L482 AbstractCegarLoop]: Abstraction has 4826 states and 15646 transitions. [2021-06-05 05:08:08,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 15646 transitions. [2021-06-05 05:08:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:08,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:08,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:08,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 05:08:08,281 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash -999410955, now seen corresponding path program 2 times [2021-06-05 05:08:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:08,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871850471] [2021-06-05 05:08:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:08:08,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:08,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871850471] [2021-06-05 05:08:08,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871850471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:08,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740834487] [2021-06-05 05:08:08,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:08,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:08:08,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740834487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:08,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:08,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:08:08,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555145618] [2021-06-05 05:08:08,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:08:08,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:08,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:08:08,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:08:08,538 INFO L87 Difference]: Start difference. First operand 4826 states and 15646 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:08,601 INFO L93 Difference]: Finished difference Result 6962 states and 22532 transitions. [2021-06-05 05:08:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:08:08,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:08,616 INFO L225 Difference]: With dead ends: 6962 [2021-06-05 05:08:08,616 INFO L226 Difference]: Without dead ends: 6313 [2021-06-05 05:08:08,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:08:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-06-05 05:08:08,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 4631. [2021-06-05 05:08:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 3.2323974082073432) internal successors, (14966), 4630 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 14966 transitions. [2021-06-05 05:08:08,721 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 14966 transitions. Word has length 48 [2021-06-05 05:08:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:08,722 INFO L482 AbstractCegarLoop]: Abstraction has 4631 states and 14966 transitions. [2021-06-05 05:08:08,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 14966 transitions. [2021-06-05 05:08:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:08,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:08,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:08,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:08,946 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2087115997, now seen corresponding path program 3 times [2021-06-05 05:08:08,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:08,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428087189] [2021-06-05 05:08:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:08:09,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:09,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428087189] [2021-06-05 05:08:09,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428087189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309594288] [2021-06-05 05:08:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:09,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:08:09,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:08:09,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309594288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:09,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:08:09,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748271136] [2021-06-05 05:08:09,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:08:09,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:08:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:08:09,159 INFO L87 Difference]: Start difference. First operand 4631 states and 14966 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:09,225 INFO L93 Difference]: Finished difference Result 8195 states and 26626 transitions. [2021-06-05 05:08:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:08:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:09,242 INFO L225 Difference]: With dead ends: 8195 [2021-06-05 05:08:09,242 INFO L226 Difference]: Without dead ends: 7472 [2021-06-05 05:08:09,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:08:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-06-05 05:08:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 6998. [2021-06-05 05:08:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 6997 states have (on average 3.2722595398027727) internal successors, (22896), 6997 states have internal predecessors, (22896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 22896 transitions. [2021-06-05 05:08:09,369 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 22896 transitions. Word has length 48 [2021-06-05 05:08:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:09,369 INFO L482 AbstractCegarLoop]: Abstraction has 6998 states and 22896 transitions. [2021-06-05 05:08:09,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 22896 transitions. [2021-06-05 05:08:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:09,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:09,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:09,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:08:09,598 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash 724420429, now seen corresponding path program 4 times [2021-06-05 05:08:09,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:09,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029946486] [2021-06-05 05:08:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:08:09,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:09,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029946486] [2021-06-05 05:08:09,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029946486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193593974] [2021-06-05 05:08:09,654 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:09,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:09,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:09,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:09,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:08:09,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193593974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:09,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:08:09,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226526544] [2021-06-05 05:08:09,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:08:09,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:08:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:08:09,770 INFO L87 Difference]: Start difference. First operand 6998 states and 22896 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:09,880 INFO L93 Difference]: Finished difference Result 9603 states and 31287 transitions. [2021-06-05 05:08:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:08:09,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:09,895 INFO L225 Difference]: With dead ends: 9603 [2021-06-05 05:08:09,895 INFO L226 Difference]: Without dead ends: 8352 [2021-06-05 05:08:09,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:08:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-05 05:08:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6644. [2021-06-05 05:08:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6644 states, 6643 states have (on average 3.2599729038085203) internal successors, (21656), 6643 states have internal predecessors, (21656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 21656 transitions. [2021-06-05 05:08:10,000 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 21656 transitions. Word has length 48 [2021-06-05 05:08:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:10,000 INFO L482 AbstractCegarLoop]: Abstraction has 6644 states and 21656 transitions. [2021-06-05 05:08:10,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 21656 transitions. [2021-06-05 05:08:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:10,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:10,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:10,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:10,233 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:10,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:10,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1312989021, now seen corresponding path program 5 times [2021-06-05 05:08:10,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:10,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911465116] [2021-06-05 05:08:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:08:10,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:10,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911465116] [2021-06-05 05:08:10,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911465116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:10,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965633922] [2021-06-05 05:08:10,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:10,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:08:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:08:10,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965633922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:10,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:10,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:08:10,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934628281] [2021-06-05 05:08:10,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:08:10,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:08:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:08:10,404 INFO L87 Difference]: Start difference. First operand 6644 states and 21656 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:10,504 INFO L93 Difference]: Finished difference Result 8899 states and 28902 transitions. [2021-06-05 05:08:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:08:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:10,517 INFO L225 Difference]: With dead ends: 8899 [2021-06-05 05:08:10,518 INFO L226 Difference]: Without dead ends: 8464 [2021-06-05 05:08:10,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:08:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2021-06-05 05:08:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 6769. [2021-06-05 05:08:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 3.255171394799054) internal successors, (22031), 6768 states have internal predecessors, (22031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 22031 transitions. [2021-06-05 05:08:10,625 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 22031 transitions. Word has length 48 [2021-06-05 05:08:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:10,625 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 22031 transitions. [2021-06-05 05:08:10,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 22031 transitions. [2021-06-05 05:08:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:10,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:10,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:10,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 05:08:10,851 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:10,852 INFO L82 PathProgramCache]: Analyzing trace with hash 823922659, now seen corresponding path program 6 times [2021-06-05 05:08:10,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:10,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214959244] [2021-06-05 05:08:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:10,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:10,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214959244] [2021-06-05 05:08:10,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214959244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:10,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381484543] [2021-06-05 05:08:10,902 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:10,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:10,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:08:10,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381484543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:10,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:10,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:08:10,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858699020] [2021-06-05 05:08:10,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:08:10,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:08:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:08:10,997 INFO L87 Difference]: Start difference. First operand 6769 states and 22031 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:11,074 INFO L93 Difference]: Finished difference Result 11547 states and 37607 transitions. [2021-06-05 05:08:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:08:11,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:11,093 INFO L225 Difference]: With dead ends: 11547 [2021-06-05 05:08:11,093 INFO L226 Difference]: Without dead ends: 11400 [2021-06-05 05:08:11,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:08:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2021-06-05 05:08:11,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 10354. [2021-06-05 05:08:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 3.3118902733507194) internal successors, (34288), 10353 states have internal predecessors, (34288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 34288 transitions. [2021-06-05 05:08:11,312 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 34288 transitions. Word has length 48 [2021-06-05 05:08:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:11,312 INFO L482 AbstractCegarLoop]: Abstraction has 10354 states and 34288 transitions. [2021-06-05 05:08:11,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 34288 transitions. [2021-06-05 05:08:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:11,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:11,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:11,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:11,533 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:11,533 INFO L82 PathProgramCache]: Analyzing trace with hash 234489175, now seen corresponding path program 7 times [2021-06-05 05:08:11,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:11,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064054287] [2021-06-05 05:08:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:11,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064054287] [2021-06-05 05:08:11,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064054287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756952475] [2021-06-05 05:08:11,583 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:11,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756952475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:11,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:11,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:08:11,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81303539] [2021-06-05 05:08:11,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:08:11,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:11,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:08:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:11,701 INFO L87 Difference]: Start difference. First operand 10354 states and 34288 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:11,811 INFO L93 Difference]: Finished difference Result 13296 states and 43632 transitions. [2021-06-05 05:08:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:08:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:11,833 INFO L225 Difference]: With dead ends: 13296 [2021-06-05 05:08:11,833 INFO L226 Difference]: Without dead ends: 11854 [2021-06-05 05:08:11,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2021-06-05 05:08:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 7019. [2021-06-05 05:08:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7019 states, 7018 states have (on average 3.2460815047021945) internal successors, (22781), 7018 states have internal predecessors, (22781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7019 states to 7019 states and 22781 transitions. [2021-06-05 05:08:11,991 INFO L78 Accepts]: Start accepts. Automaton has 7019 states and 22781 transitions. Word has length 48 [2021-06-05 05:08:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:11,991 INFO L482 AbstractCegarLoop]: Abstraction has 7019 states and 22781 transitions. [2021-06-05 05:08:11,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7019 states and 22781 transitions. [2021-06-05 05:08:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:12,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:12,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:12,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:08:12,281 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:12,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:12,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1877182247, now seen corresponding path program 8 times [2021-06-05 05:08:12,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:12,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329749792] [2021-06-05 05:08:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:12,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:12,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329749792] [2021-06-05 05:08:12,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329749792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:12,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97988041] [2021-06-05 05:08:12,388 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:12,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:12,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:12,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97988041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:12,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:12,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:08:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930454035] [2021-06-05 05:08:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:08:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:08:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:12,514 INFO L87 Difference]: Start difference. First operand 7019 states and 22781 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:12,608 INFO L93 Difference]: Finished difference Result 10813 states and 35013 transitions. [2021-06-05 05:08:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:08:12,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:12,626 INFO L225 Difference]: With dead ends: 10813 [2021-06-05 05:08:12,626 INFO L226 Difference]: Without dead ends: 10186 [2021-06-05 05:08:12,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-05 05:08:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 7527. [2021-06-05 05:08:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 7526 states have (on average 3.233723093276641) internal successors, (24337), 7526 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 24337 transitions. [2021-06-05 05:08:12,801 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 24337 transitions. Word has length 48 [2021-06-05 05:08:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:12,801 INFO L482 AbstractCegarLoop]: Abstraction has 7527 states and 24337 transitions. [2021-06-05 05:08:12,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 24337 transitions. [2021-06-05 05:08:12,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:12,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:12,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:13,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:08:13,025 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1828351565, now seen corresponding path program 9 times [2021-06-05 05:08:13,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:13,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268080735] [2021-06-05 05:08:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:13,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:13,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268080735] [2021-06-05 05:08:13,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268080735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:13,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833990514] [2021-06-05 05:08:13,096 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:13,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:08:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:13,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833990514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:13,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:13,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:08:13,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512259557] [2021-06-05 05:08:13,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:08:13,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:08:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:13,197 INFO L87 Difference]: Start difference. First operand 7527 states and 24337 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:13,287 INFO L93 Difference]: Finished difference Result 12429 states and 40214 transitions. [2021-06-05 05:08:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:08:13,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:13,306 INFO L225 Difference]: With dead ends: 12429 [2021-06-05 05:08:13,306 INFO L226 Difference]: Without dead ends: 12276 [2021-06-05 05:08:13,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2021-06-05 05:08:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 12112. [2021-06-05 05:08:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12112 states, 12111 states have (on average 3.2449838989348527) internal successors, (39300), 12111 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12112 states to 12112 states and 39300 transitions. [2021-06-05 05:08:13,568 INFO L78 Accepts]: Start accepts. Automaton has 12112 states and 39300 transitions. Word has length 48 [2021-06-05 05:08:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:13,569 INFO L482 AbstractCegarLoop]: Abstraction has 12112 states and 39300 transitions. [2021-06-05 05:08:13,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12112 states and 39300 transitions. [2021-06-05 05:08:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:13,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:13,584 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:13,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:08:13,785 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1647215527, now seen corresponding path program 10 times [2021-06-05 05:08:13,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:13,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463116533] [2021-06-05 05:08:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:13,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:13,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463116533] [2021-06-05 05:08:13,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463116533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:13,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162528375] [2021-06-05 05:08:13,841 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:13,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:13,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:14,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162528375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:14,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:08:14,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805337691] [2021-06-05 05:08:14,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:08:14,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:14,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:08:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:14,008 INFO L87 Difference]: Start difference. First operand 12112 states and 39300 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:14,139 INFO L93 Difference]: Finished difference Result 21741 states and 70711 transitions. [2021-06-05 05:08:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:08:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:14,171 INFO L225 Difference]: With dead ends: 21741 [2021-06-05 05:08:14,171 INFO L226 Difference]: Without dead ends: 19893 [2021-06-05 05:08:14,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2021-06-05 05:08:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 18976. [2021-06-05 05:08:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18976 states, 18975 states have (on average 3.25965744400527) internal successors, (61852), 18975 states have internal predecessors, (61852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18976 states to 18976 states and 61852 transitions. [2021-06-05 05:08:14,491 INFO L78 Accepts]: Start accepts. Automaton has 18976 states and 61852 transitions. Word has length 48 [2021-06-05 05:08:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:14,491 INFO L482 AbstractCegarLoop]: Abstraction has 18976 states and 61852 transitions. [2021-06-05 05:08:14,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 18976 states and 61852 transitions. [2021-06-05 05:08:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:14,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:14,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:14,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:08:14,721 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:14,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 420434765, now seen corresponding path program 11 times [2021-06-05 05:08:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:14,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432490951] [2021-06-05 05:08:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:14,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:14,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432490951] [2021-06-05 05:08:14,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432490951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444910044] [2021-06-05 05:08:14,778 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:14,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:08:14,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:14,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444910044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:14,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:08:14,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717082543] [2021-06-05 05:08:14,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:08:14,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:14,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:08:14,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:14,909 INFO L87 Difference]: Start difference. First operand 18976 states and 61852 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:15,126 INFO L93 Difference]: Finished difference Result 34095 states and 111504 transitions. [2021-06-05 05:08:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:08:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:15,179 INFO L225 Difference]: With dead ends: 34095 [2021-06-05 05:08:15,180 INFO L226 Difference]: Without dead ends: 30605 [2021-06-05 05:08:15,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2021-06-05 05:08:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 29305. [2021-06-05 05:08:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29305 states, 29304 states have (on average 3.2807125307125307) internal successors, (96138), 29304 states have internal predecessors, (96138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29305 states to 29305 states and 96138 transitions. [2021-06-05 05:08:15,814 INFO L78 Accepts]: Start accepts. Automaton has 29305 states and 96138 transitions. Word has length 48 [2021-06-05 05:08:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:15,815 INFO L482 AbstractCegarLoop]: Abstraction has 29305 states and 96138 transitions. [2021-06-05 05:08:15,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 29305 states and 96138 transitions. [2021-06-05 05:08:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:08:15,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:15,856 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:16,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:08:16,071 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1849079559, now seen corresponding path program 12 times [2021-06-05 05:08:16,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:16,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825053616] [2021-06-05 05:08:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:16,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:16,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825053616] [2021-06-05 05:08:16,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825053616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:16,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823655118] [2021-06-05 05:08:16,130 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:16,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:16,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:08:16,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:16,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823655118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:16,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:16,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:08:16,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439903169] [2021-06-05 05:08:16,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:08:16,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:16,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:08:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:16,233 INFO L87 Difference]: Start difference. First operand 29305 states and 96138 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:16,504 INFO L93 Difference]: Finished difference Result 46568 states and 152448 transitions. [2021-06-05 05:08:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:08:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:08:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:16,582 INFO L225 Difference]: With dead ends: 46568 [2021-06-05 05:08:16,582 INFO L226 Difference]: Without dead ends: 44858 [2021-06-05 05:08:16,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:08:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44858 states. [2021-06-05 05:08:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44858 to 44258. [2021-06-05 05:08:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44258 states, 44257 states have (on average 3.277741374245882) internal successors, (145063), 44257 states have internal predecessors, (145063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44258 states to 44258 states and 145063 transitions. [2021-06-05 05:08:17,415 INFO L78 Accepts]: Start accepts. Automaton has 44258 states and 145063 transitions. Word has length 48 [2021-06-05 05:08:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:17,415 INFO L482 AbstractCegarLoop]: Abstraction has 44258 states and 145063 transitions. [2021-06-05 05:08:17,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 44258 states and 145063 transitions. [2021-06-05 05:08:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:08:17,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:17,474 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:17,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:17,674 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1183199189, now seen corresponding path program 1 times [2021-06-05 05:08:17,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:17,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983059166] [2021-06-05 05:08:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:08:17,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:17,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983059166] [2021-06-05 05:08:17,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983059166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:17,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66943467] [2021-06-05 05:08:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:08:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:08:17,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66943467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:17,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:17,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 05:08:17,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332347671] [2021-06-05 05:08:17,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:08:17,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:17,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:08:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:08:17,852 INFO L87 Difference]: Start difference. First operand 44258 states and 145063 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) [2021-06-05 05:08:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:18,199 INFO L93 Difference]: Finished difference Result 44256 states and 145061 transitions. [2021-06-05 05:08:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:08:18,199 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 59 [2021-06-05 05:08:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:18,199 INFO L225 Difference]: With dead ends: 44256 [2021-06-05 05:08:18,199 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 05:08:18,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:08:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 05:08:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 05:08:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 05:08:18,200 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-06-05 05:08:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:18,200 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 05:08:18,200 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) [2021-06-05 05:08:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 05:08:18,200 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 05:08:18,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 05:08:18,402 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:08:18,407 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:08:18 BasicIcfg [2021-06-05 05:08:18,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:08:18,407 INFO L168 Benchmark]: Toolchain (without parser) took 12445.48 ms. Allocated memory was 413.1 MB in the beginning and 6.0 GB in the end (delta: 5.6 GB). Free memory was 392.9 MB in the beginning and 5.3 GB in the end (delta: -4.9 GB). Peak memory consumption was 683.8 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:18,407 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 413.1 MB. Free memory was 394.0 MB in the beginning and 394.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:08:18,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.18 ms. Allocated memory is still 413.1 MB. Free memory was 392.8 MB in the beginning and 391.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:18,407 INFO L168 Benchmark]: Boogie Preprocessor took 18.21 ms. Allocated memory is still 413.1 MB. Free memory was 391.4 MB in the beginning and 390.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:18,408 INFO L168 Benchmark]: RCFGBuilder took 207.34 ms. Allocated memory is still 413.1 MB. Free memory was 390.3 MB in the beginning and 377.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:18,408 INFO L168 Benchmark]: TraceAbstraction took 12196.59 ms. Allocated memory was 413.1 MB in the beginning and 6.0 GB in the end (delta: 5.6 GB). Free memory was 376.8 MB in the beginning and 5.3 GB in the end (delta: -4.9 GB). Peak memory consumption was 667.0 MB. Max. memory is 16.0 GB. [2021-06-05 05:08:18,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 413.1 MB. Free memory was 394.0 MB in the beginning and 394.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.18 ms. Allocated memory is still 413.1 MB. Free memory was 392.8 MB in the beginning and 391.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.21 ms. Allocated memory is still 413.1 MB. Free memory was 391.4 MB in the beginning and 390.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 207.34 ms. Allocated memory is still 413.1 MB. Free memory was 390.3 MB in the beginning and 377.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 12196.59 ms. Allocated memory was 413.1 MB in the beginning and 6.0 GB in the end (delta: 5.6 GB). Free memory was 376.8 MB in the beginning and 5.3 GB in the end (delta: -4.9 GB). Peak memory consumption was 667.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 100]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 69 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12093.9ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 367.1ms, AutomataDifference: 2365.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 101.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2083 SDtfs, 1335 SDslu, 7964 SDs, 0 SdLazy, 1605 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 584.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 640 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 494.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44258occurred in iteration=19, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3494.2ms AutomataMinimizationTime, 20 MinimizatonAttempts, 17483 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 81.6ms SsaConstructionTime, 246.5ms SatisfiabilityAnalysisTime, 2269.0ms InterpolantComputationTime, 1484 NumberOfCodeBlocks, 1475 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1451 ConstructedInterpolants, 0 QuantifiedInterpolants, 8762 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1054 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 33 InterpolantComputations, 7 PerfectInterpolantSequences, 101/557 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...