/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:25:22,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:25:22,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:25:22,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:25:22,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:25:22,666 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:25:22,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:25:22,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:25:22,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:25:22,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:25:22,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:25:22,669 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:25:22,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:25:22,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:25:22,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:25:22,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:25:22,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:25:22,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:25:22,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:25:22,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:25:22,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:25:22,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:25:22,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:25:22,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:25:22,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:25:22,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:25:22,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:25:22,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:25:22,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:25:22,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:25:22,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:25:22,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:25:22,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:25:22,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:25:22,673 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:25:22,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:25:22,673 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:25:22,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:25:22,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:25:23,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:25:23,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:25:23,006 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:25:23,007 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:25:23,007 INFO L432 ainManager$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 [2021-05-22 02:25:23,007 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl' [2021-05-22 02:25:23,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:25:23,045 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:25:23,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:25:23,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:25:23,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:25:23,060 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,066 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:25:23,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:25:23,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:25:23,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:25:23,080 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,080 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,081 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,081 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,083 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,085 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,086 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 22.05 02:25:23" (1/1) ... [2021-05-22 02:25:23,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:25:23,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:25:23,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:25:23,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:25:23,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:23" (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 [2021-05-22 02:25:23,144 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:25:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:25:23,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:25:23,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:25:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:25:23,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:25:23,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:25:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:25:23,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:25:23,146 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:25:23,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:25:23,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:25:23,147 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:25:23,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:25:23,298 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:25:23,299 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:25:23 BoogieIcfgContainer [2021-05-22 02:25:23,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:25:23,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:25:23,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:25:23,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:25:23,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:25:23" (1/2) ... [2021-05-22 02:25:23,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44124bd7 and model type misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:25:23, skipping insertion in model container [2021-05-22 02:25:23,304 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 22.05 02:25:23" (2/2) ... [2021-05-22 02:25:23,305 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3-extended.wvr.bpl [2021-05-22 02:25:23,310 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:25:23,310 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:25:23,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:25:23,310 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:25:23,344 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:25:23,375 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:25:23,390 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:25:23,390 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:25:23,390 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:25:23,391 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:25:23,391 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:25:23,391 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:25:23,391 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:25:23,391 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:25:23,399 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 124 flow [2021-05-22 02:25:23,549 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) [2021-05-22 02:25:23,556 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) [2021-05-22 02:25:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:25:23,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:23,573 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:23,574 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash -932509886, now seen corresponding path program 1 times [2021-05-22 02:25:23,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:23,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78648481] [2021-05-22 02:25:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:23,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:23,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78648481] [2021-05-22 02:25:23,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78648481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:23,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:23,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:25:23,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632772792] [2021-05-22 02:25:23,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:25:23,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:23,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:25:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:25:23,705 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) [2021-05-22 02:25:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:23,753 INFO L93 Difference]: Finished difference Result 1005 states and 3886 transitions. [2021-05-22 02:25:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:25:23,755 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 [2021-05-22 02:25:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:23,775 INFO L225 Difference]: With dead ends: 1005 [2021-05-22 02:25:23,775 INFO L226 Difference]: Without dead ends: 1005 [2021-05-22 02:25:23,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:25:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-05-22 02:25:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2021-05-22 02:25:23,893 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) [2021-05-22 02:25:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3886 transitions. [2021-05-22 02:25:23,901 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3886 transitions. Word has length 15 [2021-05-22 02:25:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:23,902 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3886 transitions. [2021-05-22 02:25:23,902 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) [2021-05-22 02:25:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3886 transitions. [2021-05-22 02:25:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:25:23,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:23,910 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] [2021-05-22 02:25:23,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:25:23,911 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:23,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash -406691327, now seen corresponding path program 1 times [2021-05-22 02:25:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:23,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296263596] [2021-05-22 02:25:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:23,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:23,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296263596] [2021-05-22 02:25:23,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296263596] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:23,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:23,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:25:23,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061039504] [2021-05-22 02:25:23,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:25:23,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:23,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:25:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:25:23,973 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) [2021-05-22 02:25:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,000 INFO L93 Difference]: Finished difference Result 1114 states and 4276 transitions. [2021-05-22 02:25:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:25:24,001 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 [2021-05-22 02:25:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,008 INFO L225 Difference]: With dead ends: 1114 [2021-05-22 02:25:24,009 INFO L226 Difference]: Without dead ends: 1114 [2021-05-22 02:25:24,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:25:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-05-22 02:25:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-05-22 02:25:24,045 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) [2021-05-22 02:25:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4276 transitions. [2021-05-22 02:25:24,051 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4276 transitions. Word has length 21 [2021-05-22 02:25:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,051 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4276 transitions. [2021-05-22 02:25:24,052 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) [2021-05-22 02:25:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4276 transitions. [2021-05-22 02:25:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:25:24,056 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,056 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] [2021-05-22 02:25:24,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:25:24,057 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2065937446, now seen corresponding path program 1 times [2021-05-22 02:25:24,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675418337] [2021-05-22 02:25:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:24,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675418337] [2021-05-22 02:25:24,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675418337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:24,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:24,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621507085] [2021-05-22 02:25:24,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:24,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:24,117 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) [2021-05-22 02:25:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,163 INFO L93 Difference]: Finished difference Result 1550 states and 5618 transitions. [2021-05-22 02:25:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:25:24,164 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 [2021-05-22 02:25:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,179 INFO L225 Difference]: With dead ends: 1550 [2021-05-22 02:25:24,179 INFO L226 Difference]: Without dead ends: 1550 [2021-05-22 02:25:24,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-05-22 02:25:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1550. [2021-05-22 02:25:24,225 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) [2021-05-22 02:25:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5618 transitions. [2021-05-22 02:25:24,237 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5618 transitions. Word has length 27 [2021-05-22 02:25:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,237 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5618 transitions. [2021-05-22 02:25:24,237 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) [2021-05-22 02:25:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5618 transitions. [2021-05-22 02:25:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-22 02:25:24,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,249 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] [2021-05-22 02:25:24,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:25:24,250 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -114728766, now seen corresponding path program 1 times [2021-05-22 02:25:24,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120293534] [2021-05-22 02:25:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:25:24,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120293534] [2021-05-22 02:25:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120293534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:24,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:24,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:25:24,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057036837] [2021-05-22 02:25:24,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:25:24,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:25:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:25:24,307 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) [2021-05-22 02:25:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,334 INFO L93 Difference]: Finished difference Result 1705 states and 6135 transitions. [2021-05-22 02:25:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:25:24,334 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 [2021-05-22 02:25:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,345 INFO L225 Difference]: With dead ends: 1705 [2021-05-22 02:25:24,345 INFO L226 Difference]: Without dead ends: 1705 [2021-05-22 02:25:24,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:25:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-05-22 02:25:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2021-05-22 02:25:24,401 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) [2021-05-22 02:25:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6135 transitions. [2021-05-22 02:25:24,413 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6135 transitions. Word has length 32 [2021-05-22 02:25:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,417 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 6135 transitions. [2021-05-22 02:25:24,417 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) [2021-05-22 02:25:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6135 transitions. [2021-05-22 02:25:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 02:25:24,423 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,423 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] [2021-05-22 02:25:24,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:25:24,423 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1356073541, now seen corresponding path program 1 times [2021-05-22 02:25:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499287872] [2021-05-22 02:25:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:25:24,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499287872] [2021-05-22 02:25:24,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499287872] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:24,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:24,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:25:24,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312556959] [2021-05-22 02:25:24,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:25:24,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:24,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:25:24,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:25:24,476 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) [2021-05-22 02:25:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,508 INFO L93 Difference]: Finished difference Result 2170 states and 7686 transitions. [2021-05-22 02:25:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:25:24,509 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 [2021-05-22 02:25:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,522 INFO L225 Difference]: With dead ends: 2170 [2021-05-22 02:25:24,523 INFO L226 Difference]: Without dead ends: 2170 [2021-05-22 02:25:24,524 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 [2021-05-22 02:25:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-05-22 02:25:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2015. [2021-05-22 02:25:24,583 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) [2021-05-22 02:25:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7169 transitions. [2021-05-22 02:25:24,596 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7169 transitions. Word has length 38 [2021-05-22 02:25:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,596 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7169 transitions. [2021-05-22 02:25:24,596 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) [2021-05-22 02:25:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7169 transitions. [2021-05-22 02:25:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-22 02:25:24,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,606 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] [2021-05-22 02:25:24,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:25:24,606 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 230141437, now seen corresponding path program 1 times [2021-05-22 02:25:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213166546] [2021-05-22 02:25:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:25:24,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213166546] [2021-05-22 02:25:24,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213166546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:24,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:24,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:24,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467030685] [2021-05-22 02:25:24,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:24,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:24,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:24,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:24,658 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) [2021-05-22 02:25:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,727 INFO L93 Difference]: Finished difference Result 2747 states and 9215 transitions. [2021-05-22 02:25:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:25:24,727 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 [2021-05-22 02:25:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,743 INFO L225 Difference]: With dead ends: 2747 [2021-05-22 02:25:24,743 INFO L226 Difference]: Without dead ends: 2747 [2021-05-22 02:25:24,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-05-22 02:25:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-05-22 02:25:24,809 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) [2021-05-22 02:25:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 9215 transitions. [2021-05-22 02:25:24,823 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 9215 transitions. Word has length 38 [2021-05-22 02:25:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,823 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 9215 transitions. [2021-05-22 02:25:24,823 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) [2021-05-22 02:25:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 9215 transitions. [2021-05-22 02:25:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-22 02:25:24,831 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,831 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] [2021-05-22 02:25:24,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:25:24,831 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash -76350981, now seen corresponding path program 1 times [2021-05-22 02:25:24,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65739219] [2021-05-22 02:25:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-22 02:25:24,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65739219] [2021-05-22 02:25:24,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65739219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:25:24,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:25:24,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:25:24,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115252892] [2021-05-22 02:25:24,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:25:24,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:25:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:24,870 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) [2021-05-22 02:25:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,904 INFO L93 Difference]: Finished difference Result 3169 states and 10115 transitions. [2021-05-22 02:25:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:25:24,904 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 [2021-05-22 02:25:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,920 INFO L225 Difference]: With dead ends: 3169 [2021-05-22 02:25:24,920 INFO L226 Difference]: Without dead ends: 3169 [2021-05-22 02:25:24,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:25:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-05-22 02:25:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3169. [2021-05-22 02:25:24,988 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) [2021-05-22 02:25:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 10115 transitions. [2021-05-22 02:25:24,999 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 10115 transitions. Word has length 43 [2021-05-22 02:25:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,999 INFO L482 AbstractCegarLoop]: Abstraction has 3169 states and 10115 transitions. [2021-05-22 02:25:25,000 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) [2021-05-22 02:25:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 10115 transitions. [2021-05-22 02:25:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:25,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:25,007 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] [2021-05-22 02:25:25,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:25:25,008 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2047461749, now seen corresponding path program 1 times [2021-05-22 02:25:25,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:25,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764525553] [2021-05-22 02:25:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:25,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:25,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764525553] [2021-05-22 02:25:25,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764525553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:25,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356563024] [2021-05-22 02:25:25,161 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 [2021-05-22 02:25:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:25,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356563024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:25,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:25,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-22 02:25:25,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369165403] [2021-05-22 02:25:25,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:25:25,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:25,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:25:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:25,461 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) [2021-05-22 02:25:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:25,522 INFO L93 Difference]: Finished difference Result 5225 states and 16762 transitions. [2021-05-22 02:25:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:25:25,523 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 [2021-05-22 02:25:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:25,554 INFO L225 Difference]: With dead ends: 5225 [2021-05-22 02:25:25,554 INFO L226 Difference]: Without dead ends: 5074 [2021-05-22 02:25:25,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:25:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5074 states. [2021-05-22 02:25:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5074 to 4826. [2021-05-22 02:25:25,686 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) [2021-05-22 02:25:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 15646 transitions. [2021-05-22 02:25:25,705 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 15646 transitions. Word has length 48 [2021-05-22 02:25:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:25,705 INFO L482 AbstractCegarLoop]: Abstraction has 4826 states and 15646 transitions. [2021-05-22 02:25:25,706 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) [2021-05-22 02:25:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 15646 transitions. [2021-05-22 02:25:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:25,719 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:25,719 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] [2021-05-22 02:25:25,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-22 02:25:25,944 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash -999410955, now seen corresponding path program 2 times [2021-05-22 02:25:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:25,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135839640] [2021-05-22 02:25:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:26,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:26,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135839640] [2021-05-22 02:25:26,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135839640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:26,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194142604] [2021-05-22 02:25:26,016 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 [2021-05-22 02:25:26,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:26,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:26,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194142604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:26,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:26,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-22 02:25:26,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402280797] [2021-05-22 02:25:26,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:25:26,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:26,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:25:26,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:26,177 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) [2021-05-22 02:25:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:26,307 INFO L93 Difference]: Finished difference Result 6962 states and 22532 transitions. [2021-05-22 02:25:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:25:26,308 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 [2021-05-22 02:25:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:26,330 INFO L225 Difference]: With dead ends: 6962 [2021-05-22 02:25:26,330 INFO L226 Difference]: Without dead ends: 6313 [2021-05-22 02:25:26,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-05-22 02:25:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 4631. [2021-05-22 02:25:26,463 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) [2021-05-22 02:25:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 14966 transitions. [2021-05-22 02:25:26,482 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 14966 transitions. Word has length 48 [2021-05-22 02:25:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:26,483 INFO L482 AbstractCegarLoop]: Abstraction has 4631 states and 14966 transitions. [2021-05-22 02:25:26,483 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) [2021-05-22 02:25:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 14966 transitions. [2021-05-22 02:25:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:26,494 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:26,494 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] [2021-05-22 02:25:26,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:26,717 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2087115997, now seen corresponding path program 3 times [2021-05-22 02:25:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:26,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085735154] [2021-05-22 02:25:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:26,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:26,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085735154] [2021-05-22 02:25:26,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085735154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349554290] [2021-05-22 02:25:26,771 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 [2021-05-22 02:25:26,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:25:26,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:26,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:25:26,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349554290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:26,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:26,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-05-22 02:25:26,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234805533] [2021-05-22 02:25:26,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:25:26,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:26,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:25:26,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:26,910 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) [2021-05-22 02:25:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:27,004 INFO L93 Difference]: Finished difference Result 8195 states and 26626 transitions. [2021-05-22 02:25:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:25:27,004 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 [2021-05-22 02:25:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:27,031 INFO L225 Difference]: With dead ends: 8195 [2021-05-22 02:25:27,031 INFO L226 Difference]: Without dead ends: 7472 [2021-05-22 02:25:27,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:25:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-05-22 02:25:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 6998. [2021-05-22 02:25:27,215 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) [2021-05-22 02:25:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 22896 transitions. [2021-05-22 02:25:27,304 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 22896 transitions. Word has length 48 [2021-05-22 02:25:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:27,304 INFO L482 AbstractCegarLoop]: Abstraction has 6998 states and 22896 transitions. [2021-05-22 02:25:27,304 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) [2021-05-22 02:25:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 22896 transitions. [2021-05-22 02:25:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:27,337 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:27,337 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] [2021-05-22 02:25:27,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-22 02:25:27,554 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash 724420429, now seen corresponding path program 4 times [2021-05-22 02:25:27,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:27,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523809444] [2021-05-22 02:25:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:25:27,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:27,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523809444] [2021-05-22 02:25:27,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523809444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:27,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238682097] [2021-05-22 02:25:27,689 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 [2021-05-22 02:25:27,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:27,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-22 02:25:27,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238682097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:27,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:27,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-22 02:25:27,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438538834] [2021-05-22 02:25:27,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:27,831 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) [2021-05-22 02:25:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:27,975 INFO L93 Difference]: Finished difference Result 9603 states and 31287 transitions. [2021-05-22 02:25:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:27,976 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 [2021-05-22 02:25:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:28,004 INFO L225 Difference]: With dead ends: 9603 [2021-05-22 02:25:28,004 INFO L226 Difference]: Without dead ends: 8352 [2021-05-22 02:25:28,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-05-22 02:25:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6644. [2021-05-22 02:25:28,231 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) [2021-05-22 02:25:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 21656 transitions. [2021-05-22 02:25:28,264 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 21656 transitions. Word has length 48 [2021-05-22 02:25:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:28,264 INFO L482 AbstractCegarLoop]: Abstraction has 6644 states and 21656 transitions. [2021-05-22 02:25:28,264 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) [2021-05-22 02:25:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 21656 transitions. [2021-05-22 02:25:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:28,280 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:28,280 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] [2021-05-22 02:25:28,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:28,504 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1312989021, now seen corresponding path program 5 times [2021-05-22 02:25:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309459589] [2021-05-22 02:25:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-22 02:25:28,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:28,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309459589] [2021-05-22 02:25:28,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309459589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:28,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661838155] [2021-05-22 02:25:28,570 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 [2021-05-22 02:25:28,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:28,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-22 02:25:28,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661838155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:28,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:28,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-22 02:25:28,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181280382] [2021-05-22 02:25:28,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:28,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:28,720 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) [2021-05-22 02:25:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:28,869 INFO L93 Difference]: Finished difference Result 8899 states and 28902 transitions. [2021-05-22 02:25:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:28,869 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 [2021-05-22 02:25:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:28,892 INFO L225 Difference]: With dead ends: 8899 [2021-05-22 02:25:28,892 INFO L226 Difference]: Without dead ends: 8464 [2021-05-22 02:25:28,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2021-05-22 02:25:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 6769. [2021-05-22 02:25:29,044 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) [2021-05-22 02:25:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 22031 transitions. [2021-05-22 02:25:29,066 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 22031 transitions. Word has length 48 [2021-05-22 02:25:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:29,067 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 22031 transitions. [2021-05-22 02:25:29,067 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) [2021-05-22 02:25:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 22031 transitions. [2021-05-22 02:25:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:29,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:29,083 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] [2021-05-22 02:25:29,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-22 02:25:29,297 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:29,297 INFO L82 PathProgramCache]: Analyzing trace with hash 823922659, now seen corresponding path program 6 times [2021-05-22 02:25:29,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:29,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034859525] [2021-05-22 02:25:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:25:29,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:29,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034859525] [2021-05-22 02:25:29,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034859525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:29,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074636419] [2021-05-22 02:25:29,371 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 [2021-05-22 02:25:29,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:29,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-22 02:25:29,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074636419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:29,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:29,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-05-22 02:25:29,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016264067] [2021-05-22 02:25:29,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:25:29,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:25:29,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:29,547 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) [2021-05-22 02:25:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:29,660 INFO L93 Difference]: Finished difference Result 11547 states and 37607 transitions. [2021-05-22 02:25:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:25:29,660 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 [2021-05-22 02:25:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:29,692 INFO L225 Difference]: With dead ends: 11547 [2021-05-22 02:25:29,692 INFO L226 Difference]: Without dead ends: 11400 [2021-05-22 02:25:29,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:25:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2021-05-22 02:25:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 10354. [2021-05-22 02:25:29,949 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) [2021-05-22 02:25:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 34288 transitions. [2021-05-22 02:25:29,979 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 34288 transitions. Word has length 48 [2021-05-22 02:25:29,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:29,979 INFO L482 AbstractCegarLoop]: Abstraction has 10354 states and 34288 transitions. [2021-05-22 02:25:29,979 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) [2021-05-22 02:25:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 34288 transitions. [2021-05-22 02:25:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:30,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:30,001 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] [2021-05-22 02:25:30,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:30,224 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 234489175, now seen corresponding path program 7 times [2021-05-22 02:25:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:30,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191059154] [2021-05-22 02:25:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:30,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:30,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191059154] [2021-05-22 02:25:30,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191059154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:30,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899138002] [2021-05-22 02:25:30,289 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 [2021-05-22 02:25:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:30,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899138002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:30,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:30,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-22 02:25:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387481782] [2021-05-22 02:25:30,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:30,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:30,417 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) [2021-05-22 02:25:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:30,554 INFO L93 Difference]: Finished difference Result 13296 states and 43632 transitions. [2021-05-22 02:25:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:25:30,555 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 [2021-05-22 02:25:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:30,582 INFO L225 Difference]: With dead ends: 13296 [2021-05-22 02:25:30,582 INFO L226 Difference]: Without dead ends: 11854 [2021-05-22 02:25:30,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2021-05-22 02:25:30,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 7019. [2021-05-22 02:25:30,849 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) [2021-05-22 02:25:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7019 states to 7019 states and 22781 transitions. [2021-05-22 02:25:30,871 INFO L78 Accepts]: Start accepts. Automaton has 7019 states and 22781 transitions. Word has length 48 [2021-05-22 02:25:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:30,872 INFO L482 AbstractCegarLoop]: Abstraction has 7019 states and 22781 transitions. [2021-05-22 02:25:30,872 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) [2021-05-22 02:25:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7019 states and 22781 transitions. [2021-05-22 02:25:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:30,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:30,891 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] [2021-05-22 02:25:31,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-22 02:25:31,105 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1877182247, now seen corresponding path program 8 times [2021-05-22 02:25:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:31,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183242062] [2021-05-22 02:25:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:31,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:31,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183242062] [2021-05-22 02:25:31,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183242062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659822647] [2021-05-22 02:25:31,170 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 [2021-05-22 02:25:31,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:31,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:31,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659822647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:31,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:31,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-22 02:25:31,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773696593] [2021-05-22 02:25:31,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:31,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:31,323 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) [2021-05-22 02:25:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:31,523 INFO L93 Difference]: Finished difference Result 10813 states and 35013 transitions. [2021-05-22 02:25:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:25:31,523 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 [2021-05-22 02:25:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:31,544 INFO L225 Difference]: With dead ends: 10813 [2021-05-22 02:25:31,544 INFO L226 Difference]: Without dead ends: 10186 [2021-05-22 02:25:31,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-05-22 02:25:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 7527. [2021-05-22 02:25:31,697 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) [2021-05-22 02:25:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 24337 transitions. [2021-05-22 02:25:31,717 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 24337 transitions. Word has length 48 [2021-05-22 02:25:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:31,718 INFO L482 AbstractCegarLoop]: Abstraction has 7527 states and 24337 transitions. [2021-05-22 02:25:31,718 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) [2021-05-22 02:25:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 24337 transitions. [2021-05-22 02:25:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:31,730 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:31,730 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] [2021-05-22 02:25:31,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-22 02:25:31,945 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1828351565, now seen corresponding path program 9 times [2021-05-22 02:25:31,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:31,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377841613] [2021-05-22 02:25:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:32,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:32,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377841613] [2021-05-22 02:25:32,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377841613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:32,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151835375] [2021-05-22 02:25:32,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:25:32,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:25:32,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:32,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151835375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:32,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:32,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-22 02:25:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722048582] [2021-05-22 02:25:32,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:32,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:32,188 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) [2021-05-22 02:25:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:32,315 INFO L93 Difference]: Finished difference Result 12429 states and 40214 transitions. [2021-05-22 02:25:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:25:32,315 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 [2021-05-22 02:25:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:32,336 INFO L225 Difference]: With dead ends: 12429 [2021-05-22 02:25:32,336 INFO L226 Difference]: Without dead ends: 12276 [2021-05-22 02:25:32,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2021-05-22 02:25:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 12112. [2021-05-22 02:25:32,595 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) [2021-05-22 02:25:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12112 states to 12112 states and 39300 transitions. [2021-05-22 02:25:32,629 INFO L78 Accepts]: Start accepts. Automaton has 12112 states and 39300 transitions. Word has length 48 [2021-05-22 02:25:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:32,629 INFO L482 AbstractCegarLoop]: Abstraction has 12112 states and 39300 transitions. [2021-05-22 02:25:32,630 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) [2021-05-22 02:25:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12112 states and 39300 transitions. [2021-05-22 02:25:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:32,650 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:32,650 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] [2021-05-22 02:25:32,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-22 02:25:32,871 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:32,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1647215527, now seen corresponding path program 10 times [2021-05-22 02:25:32,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:32,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623687572] [2021-05-22 02:25:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:32,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623687572] [2021-05-22 02:25:32,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623687572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134065867] [2021-05-22 02:25:32,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:25:32,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:32,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:32,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:33,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134065867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:33,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:33,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-22 02:25:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141656764] [2021-05-22 02:25:33,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:33,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:33,074 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) [2021-05-22 02:25:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:33,234 INFO L93 Difference]: Finished difference Result 21741 states and 70711 transitions. [2021-05-22 02:25:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:25:33,234 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 [2021-05-22 02:25:33,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:33,276 INFO L225 Difference]: With dead ends: 21741 [2021-05-22 02:25:33,276 INFO L226 Difference]: Without dead ends: 19893 [2021-05-22 02:25:33,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2021-05-22 02:25:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 18976. [2021-05-22 02:25:33,670 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) [2021-05-22 02:25:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18976 states to 18976 states and 61852 transitions. [2021-05-22 02:25:33,901 INFO L78 Accepts]: Start accepts. Automaton has 18976 states and 61852 transitions. Word has length 48 [2021-05-22 02:25:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:33,901 INFO L482 AbstractCegarLoop]: Abstraction has 18976 states and 61852 transitions. [2021-05-22 02:25:33,901 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) [2021-05-22 02:25:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18976 states and 61852 transitions. [2021-05-22 02:25:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:33,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:33,953 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] [2021-05-22 02:25:34,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-22 02:25:34,157 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:34,158 INFO L82 PathProgramCache]: Analyzing trace with hash 420434765, now seen corresponding path program 11 times [2021-05-22 02:25:34,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:34,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123009042] [2021-05-22 02:25:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:34,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:34,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123009042] [2021-05-22 02:25:34,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123009042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:34,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276965719] [2021-05-22 02:25:34,239 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 [2021-05-22 02:25:34,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:25:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:34,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276965719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:34,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:34,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-22 02:25:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597840971] [2021-05-22 02:25:34,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:34,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:34,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:34,415 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) [2021-05-22 02:25:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:34,706 INFO L93 Difference]: Finished difference Result 34095 states and 111504 transitions. [2021-05-22 02:25:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:25:34,707 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 [2021-05-22 02:25:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:34,765 INFO L225 Difference]: With dead ends: 34095 [2021-05-22 02:25:34,765 INFO L226 Difference]: Without dead ends: 30605 [2021-05-22 02:25:34,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2021-05-22 02:25:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 29305. [2021-05-22 02:25:35,306 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) [2021-05-22 02:25:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29305 states to 29305 states and 96138 transitions. [2021-05-22 02:25:35,375 INFO L78 Accepts]: Start accepts. Automaton has 29305 states and 96138 transitions. Word has length 48 [2021-05-22 02:25:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:35,375 INFO L482 AbstractCegarLoop]: Abstraction has 29305 states and 96138 transitions. [2021-05-22 02:25:35,375 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) [2021-05-22 02:25:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 29305 states and 96138 transitions. [2021-05-22 02:25:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-22 02:25:35,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:35,431 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] [2021-05-22 02:25:35,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-22 02:25:35,653 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1849079559, now seen corresponding path program 12 times [2021-05-22 02:25:35,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:35,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246656764] [2021-05-22 02:25:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:35,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:35,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246656764] [2021-05-22 02:25:35,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246656764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:35,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261504191] [2021-05-22 02:25:35,712 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 [2021-05-22 02:25:35,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:35,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:35,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:25:35,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:36,004 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-22 02:25:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:25:36,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261504191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:36,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:36,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-05-22 02:25:36,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874261255] [2021-05-22 02:25:36,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-22 02:25:36,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:36,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-22 02:25:36,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:36,051 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) [2021-05-22 02:25:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:36,426 INFO L93 Difference]: Finished difference Result 46568 states and 152448 transitions. [2021-05-22 02:25:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:25:36,426 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 [2021-05-22 02:25:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:36,551 INFO L225 Difference]: With dead ends: 46568 [2021-05-22 02:25:36,552 INFO L226 Difference]: Without dead ends: 44858 [2021-05-22 02:25:36,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:25:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44858 states. [2021-05-22 02:25:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44858 to 44258. [2021-05-22 02:25:37,255 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) [2021-05-22 02:25:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44258 states to 44258 states and 145063 transitions. [2021-05-22 02:25:37,347 INFO L78 Accepts]: Start accepts. Automaton has 44258 states and 145063 transitions. Word has length 48 [2021-05-22 02:25:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:37,347 INFO L482 AbstractCegarLoop]: Abstraction has 44258 states and 145063 transitions. [2021-05-22 02:25:37,347 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) [2021-05-22 02:25:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44258 states and 145063 transitions. [2021-05-22 02:25:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-22 02:25:37,407 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:37,407 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] [2021-05-22 02:25:37,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:37,610 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1183199189, now seen corresponding path program 1 times [2021-05-22 02:25:37,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:37,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242847071] [2021-05-22 02:25:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:25:37,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:37,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242847071] [2021-05-22 02:25:37,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242847071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:37,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436456859] [2021-05-22 02:25:37,683 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 [2021-05-22 02:25:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:37,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:25:37,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-22 02:25:38,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436456859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:38,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:38,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-22 02:25:38,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275025676] [2021-05-22 02:25:38,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:25:38,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:38,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:25:38,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:38,075 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) [2021-05-22 02:25:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:38,302 INFO L93 Difference]: Finished difference Result 44256 states and 145061 transitions. [2021-05-22 02:25:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:25:38,302 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 [2021-05-22 02:25:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:38,303 INFO L225 Difference]: With dead ends: 44256 [2021-05-22 02:25:38,303 INFO L226 Difference]: Without dead ends: 0 [2021-05-22 02:25:38,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:25:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-22 02:25:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-22 02:25:38,303 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) [2021-05-22 02:25:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-22 02:25:38,303 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-05-22 02:25:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:38,303 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-22 02:25:38,303 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) [2021-05-22 02:25:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-22 02:25:38,304 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:25:38,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-22 02:25:38,504 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-05-22 02:25:38,506 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-22 02:25:38,506 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:25:38,506 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:25:38,507 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:25:38,507 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:25:38,507 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:25:38,507 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:25:38,507 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:25:38,507 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:25:38,509 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 124 flow [2021-05-22 02:25:38,530 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) [2021-05-22 02:25:38,531 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) [2021-05-22 02:25:38,534 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-22 02:25:38,534 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-22 02:25:38,534 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:25:38,542 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:25:38 BasicIcfg [2021-05-22 02:25:38,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:25:38,543 INFO L168 Benchmark]: Toolchain (without parser) took 15497.60 ms. Allocated memory was 329.3 MB in the beginning and 5.9 GB in the end (delta: 5.6 GB). Free memory was 308.4 MB in the beginning and 5.1 GB in the end (delta: -4.8 GB). Peak memory consumption was 785.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:38,543 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 329.3 MB. Free memory is still 309.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:38,543 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.62 ms. Allocated memory is still 329.3 MB. Free memory was 308.3 MB in the beginning and 306.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:25:38,543 INFO L168 Benchmark]: Boogie Preprocessor took 13.00 ms. Allocated memory is still 329.3 MB. Free memory was 306.9 MB in the beginning and 306.0 MB in the end (delta: 946.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:38,543 INFO L168 Benchmark]: RCFGBuilder took 211.77 ms. Allocated memory is still 329.3 MB. Free memory was 305.9 MB in the beginning and 293.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:38,543 INFO L168 Benchmark]: TraceAbstraction took 15241.98 ms. Allocated memory was 329.3 MB in the beginning and 5.9 GB in the end (delta: 5.6 GB). Free memory was 292.6 MB in the beginning and 5.1 GB in the end (delta: -4.8 GB). Peak memory consumption was 771.0 MB. Max. memory is 16.0 GB. [2021-05-22 02:25:38,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 329.3 MB. Free memory is still 309.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.62 ms. Allocated memory is still 329.3 MB. Free memory was 308.3 MB in the beginning and 306.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.00 ms. Allocated memory is still 329.3 MB. Free memory was 306.9 MB in the beginning and 306.0 MB in the end (delta: 946.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 211.77 ms. Allocated memory is still 329.3 MB. Free memory was 305.9 MB in the beginning and 293.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 15241.98 ms. Allocated memory was 329.3 MB in the beginning and 5.9 GB in the end (delta: 5.6 GB). Free memory was 292.6 MB in the beginning and 5.1 GB in the end (delta: -4.8 GB). Peak memory consumption was 771.0 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: 15115.9ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 399.4ms, AutomataDifference: 3107.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 158.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2083 SDtfs, 1335 SDslu, 7964 SDs, 0 SdLazy, 1605 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 765.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 640 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 626.5ms 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: 4583.4ms AutomataMinimizationTime, 20 MinimizatonAttempts, 17483 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 282.4ms SsaConstructionTime, 343.8ms SatisfiabilityAnalysisTime, 2879.6ms 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 69 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=916occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: 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...