/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:44:14,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:44:14,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:44:14,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:44:14,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:44:14,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:44:14,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:44:14,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:44:14,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:44:14,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:44:14,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:44:14,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:44:14,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:44:14,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:44:14,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:44:14,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:44:14,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:44:14,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:44:14,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:44:14,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:44:14,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:44:14,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:44:14,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:44:14,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:44:14,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:44:14,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:44:14,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:44:14,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:44:14,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:44:14,577 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:44:14,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:44:14,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:44:14,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:44:14,580 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:44:14,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:44:14,580 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:44:14,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:44:14,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:44:14,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:44:14,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:44:14,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:44:14,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:44:14,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:44:14,583 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:44:14,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:44:14,584 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:44:14,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:44:14,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:44:14,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:44:14,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:44:14,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:44:14,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:14,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:44:14,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:44:14,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:44:14,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:44:14,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:44:14,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:44:14,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:44:14,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:44:14,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:44:14,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:44:14,867 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:44:14,868 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:44:14,869 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2019-11-23 20:44:14,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eae204aea/c26085619e4e432e9521f77291651de3/FLAGaf76e3f58 [2019-11-23 20:44:15,387 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:44:15,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2019-11-23 20:44:15,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eae204aea/c26085619e4e432e9521f77291651de3/FLAGaf76e3f58 [2019-11-23 20:44:15,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eae204aea/c26085619e4e432e9521f77291651de3 [2019-11-23 20:44:15,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:44:15,774 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:44:15,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:15,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:44:15,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:44:15,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:15" (1/1) ... [2019-11-23 20:44:15,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577254a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:15, skipping insertion in model container [2019-11-23 20:44:15,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:15" (1/1) ... [2019-11-23 20:44:15,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:44:15,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:44:15,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:16,001 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:44:16,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:16,037 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:44:16,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16 WrapperNode [2019-11-23 20:44:16,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:16,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:16,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:44:16,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:44:16,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:16,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:44:16,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:44:16,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:44:16,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... [2019-11-23 20:44:16,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:44:16,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:44:16,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:44:16,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:44:16,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:44:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:44:16,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:44:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:44:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:44:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:44:16,514 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:44:16,514 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:44:16,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:16 BoogieIcfgContainer [2019-11-23 20:44:16,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:44:16,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:44:16,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:44:16,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:44:16,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:44:15" (1/3) ... [2019-11-23 20:44:16,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24551f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:16, skipping insertion in model container [2019-11-23 20:44:16,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:16" (2/3) ... [2019-11-23 20:44:16,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24551f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:16, skipping insertion in model container [2019-11-23 20:44:16,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:16" (3/3) ... [2019-11-23 20:44:16,536 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2019-11-23 20:44:16,550 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:44:16,557 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:44:16,568 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:44:16,590 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:44:16,590 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:44:16,590 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:44:16,591 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:44:16,591 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:44:16,591 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:44:16,591 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:44:16,591 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:44:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:44:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:44:16,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:16,609 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:16,609 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2019-11-23 20:44:16,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:16,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130962156] [2019-11-23 20:44:16,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:44:16,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130962156] [2019-11-23 20:44:16,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:16,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:44:16,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294437068] [2019-11-23 20:44:16,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:44:16,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:44:16,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:44:16,761 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-23 20:44:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:16,778 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2019-11-23 20:44:16,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:44:16,779 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:44:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:16,789 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:44:16,789 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:44:16,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:44:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:44:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:44:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:44:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 20:44:16,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2019-11-23 20:44:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:16,828 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 20:44:16,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:44:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 20:44:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:44:16,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:16,829 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:16,829 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:16,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2019-11-23 20:44:16,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:16,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344591559] [2019-11-23 20:44:16,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:44:16,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344591559] [2019-11-23 20:44:16,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:16,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:44:16,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809159481] [2019-11-23 20:44:16,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:44:16,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:16,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:44:16,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:16,884 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2019-11-23 20:44:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:16,966 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-23 20:44:16,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:44:16,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:44:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:16,968 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:44:16,968 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:44:16,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:44:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-11-23 20:44:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:44:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 20:44:16,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-23 20:44:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:16,977 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 20:44:16,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:44:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 20:44:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:44:16,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:16,978 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:16,979 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2019-11-23 20:44:16,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:16,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456590431] [2019-11-23 20:44:16,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:44:17,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456590431] [2019-11-23 20:44:17,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963093257] [2019-11-23 20:44:17,059 INFO L94 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 [2019-11-23 20:44:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:17,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:17,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:44:17,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:17,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:44:17,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753492034] [2019-11-23 20:44:17,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:44:17,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:44:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:44:17,189 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2019-11-23 20:44:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:17,250 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2019-11-23 20:44:17,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:17,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 20:44:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:17,252 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:44:17,252 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:44:17,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:44:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:44:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2019-11-23 20:44:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:44:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 20:44:17,258 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2019-11-23 20:44:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:17,259 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 20:44:17,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:44:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 20:44:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:44:17,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:17,260 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:17,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:17,464 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2030845279, now seen corresponding path program 2 times [2019-11-23 20:44:17,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:17,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737502258] [2019-11-23 20:44:17,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:44:17,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737502258] [2019-11-23 20:44:17,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990457286] [2019-11-23 20:44:17,555 INFO L92 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 [2019-11-23 20:44:17,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:44:17,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:17,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:44:17,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:44:17,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:17,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:44:17,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011863611] [2019-11-23 20:44:17,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:44:17,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:44:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:44:17,619 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 6 states. [2019-11-23 20:44:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:17,694 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-11-23 20:44:17,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:44:17,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-23 20:44:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:17,695 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:44:17,695 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:44:17,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:44:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:44:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-11-23 20:44:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:44:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-23 20:44:17,701 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 20 [2019-11-23 20:44:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:17,702 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-23 20:44:17,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:44:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-23 20:44:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:44:17,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:17,703 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:17,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:17,907 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash -224231843, now seen corresponding path program 3 times [2019-11-23 20:44:17,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:17,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431185956] [2019-11-23 20:44:17,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:44:17,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431185956] [2019-11-23 20:44:18,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442696970] [2019-11-23 20:44:18,002 INFO L92 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 [2019-11-23 20:44:18,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:44:18,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:18,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:44:18,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:44:18,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:18,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:44:18,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115638670] [2019-11-23 20:44:18,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:44:18,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:44:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:44:18,077 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 7 states. [2019-11-23 20:44:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:18,166 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-11-23 20:44:18,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:44:18,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-23 20:44:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:18,168 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:44:18,168 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:44:18,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:44:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:44:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 20:44:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:44:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-23 20:44:18,177 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2019-11-23 20:44:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:18,178 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-23 20:44:18,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:44:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-23 20:44:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:44:18,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:18,181 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:18,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:18,382 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 4 times [2019-11-23 20:44:18,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:18,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564447057] [2019-11-23 20:44:18,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:44:18,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564447057] [2019-11-23 20:44:18,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592737158] [2019-11-23 20:44:18,489 INFO L92 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 [2019-11-23 20:44:18,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:44:18,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:18,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:44:18,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:44:18,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:18,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:44:18,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173525260] [2019-11-23 20:44:18,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:44:18,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:44:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:44:18,576 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2019-11-23 20:44:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:18,678 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2019-11-23 20:44:18,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:44:18,680 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-23 20:44:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:18,681 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:44:18,681 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:44:18,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:44:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:44:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-23 20:44:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:44:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-23 20:44:18,694 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 30 [2019-11-23 20:44:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:18,694 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-23 20:44:18,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:44:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-23 20:44:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:44:18,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:18,696 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:18,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:18,901 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:18,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1407538841, now seen corresponding path program 5 times [2019-11-23 20:44:18,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:18,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120491148] [2019-11-23 20:44:18,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:44:19,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120491148] [2019-11-23 20:44:19,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977882743] [2019-11-23 20:44:19,028 INFO L92 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 [2019-11-23 20:44:19,275 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:44:19,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:19,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:44:19,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:44:19,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:19,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:44:19,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150575419] [2019-11-23 20:44:19,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:44:19,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:19,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:44:19,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:44:19,294 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2019-11-23 20:44:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:19,384 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-11-23 20:44:19,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:44:19,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-11-23 20:44:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:19,386 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:44:19,386 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:44:19,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:44:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:44:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2019-11-23 20:44:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:44:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-11-23 20:44:19,392 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 35 [2019-11-23 20:44:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:19,393 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-11-23 20:44:19,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:44:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-11-23 20:44:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:44:19,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:19,394 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:19,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:19,595 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash 968499753, now seen corresponding path program 6 times [2019-11-23 20:44:19,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:19,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664413472] [2019-11-23 20:44:19,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:44:19,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664413472] [2019-11-23 20:44:19,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029292006] [2019-11-23 20:44:19,727 INFO L92 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 [2019-11-23 20:44:20,069 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:44:20,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:20,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:44:20,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:44:20,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:20,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:44:20,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740333961] [2019-11-23 20:44:20,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:44:20,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:44:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:44:20,094 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 10 states. [2019-11-23 20:44:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:20,214 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2019-11-23 20:44:20,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:44:20,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-11-23 20:44:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:20,215 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:44:20,216 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:44:20,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:44:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:44:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-23 20:44:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:44:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-11-23 20:44:20,222 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 40 [2019-11-23 20:44:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:20,223 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-11-23 20:44:20,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:44:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-11-23 20:44:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:44:20,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:20,224 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:20,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:20,437 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1016346923, now seen corresponding path program 7 times [2019-11-23 20:44:20,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:20,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845590245] [2019-11-23 20:44:20,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:44:20,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845590245] [2019-11-23 20:44:20,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761796707] [2019-11-23 20:44:20,576 INFO L92 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 [2019-11-23 20:44:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:20,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:44:20,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:44:20,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:20,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:44:20,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231991523] [2019-11-23 20:44:20,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:44:20,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:44:20,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:44:20,668 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 11 states. [2019-11-23 20:44:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:20,780 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2019-11-23 20:44:20,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:44:20,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-11-23 20:44:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:20,781 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:44:20,782 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:44:20,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:44:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:44:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-11-23 20:44:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:44:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2019-11-23 20:44:20,788 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 45 [2019-11-23 20:44:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:20,789 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2019-11-23 20:44:20,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:44:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2019-11-23 20:44:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:44:20,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:20,790 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:20,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:21,000 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1143734803, now seen corresponding path program 8 times [2019-11-23 20:44:21,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:21,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371812559] [2019-11-23 20:44:21,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:44:21,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371812559] [2019-11-23 20:44:21,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545079329] [2019-11-23 20:44:21,120 INFO L92 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 [2019-11-23 20:44:21,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:44:21,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:21,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:44:21,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:44:21,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:21,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:44:21,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792399352] [2019-11-23 20:44:21,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:44:21,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:44:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:44:21,214 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 12 states. [2019-11-23 20:44:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:21,319 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2019-11-23 20:44:21,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:44:21,322 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2019-11-23 20:44:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:21,323 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:44:21,323 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:44:21,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:44:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:44:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-23 20:44:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:44:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2019-11-23 20:44:21,331 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2019-11-23 20:44:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:21,332 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2019-11-23 20:44:21,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:44:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2019-11-23 20:44:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:44:21,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:21,333 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:21,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:21,534 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1908772625, now seen corresponding path program 9 times [2019-11-23 20:44:21,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:21,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270589428] [2019-11-23 20:44:21,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:44:21,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270589428] [2019-11-23 20:44:21,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761021279] [2019-11-23 20:44:21,688 INFO L92 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 [2019-11-23 20:44:24,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:44:24,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:24,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:44:24,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:44:24,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:24,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:44:24,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986636668] [2019-11-23 20:44:24,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:44:24,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:44:24,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:44:24,621 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 13 states. [2019-11-23 20:44:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:24,760 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2019-11-23 20:44:24,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:44:24,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2019-11-23 20:44:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:24,762 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:44:24,762 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:44:24,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:44:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:44:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-11-23 20:44:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:44:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2019-11-23 20:44:24,772 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2019-11-23 20:44:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:24,773 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2019-11-23 20:44:24,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:44:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2019-11-23 20:44:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:44:24,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:24,777 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:24,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:24,986 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 10 times [2019-11-23 20:44:24,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:24,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650256132] [2019-11-23 20:44:24,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:44:25,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650256132] [2019-11-23 20:44:25,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782377015] [2019-11-23 20:44:25,108 INFO L92 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 [2019-11-23 20:44:25,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:44:25,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:25,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:44:25,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:44:25,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:25,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:44:25,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655957614] [2019-11-23 20:44:25,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:44:25,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:44:25,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:44:25,234 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 14 states. [2019-11-23 20:44:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:25,374 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2019-11-23 20:44:25,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:44:25,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-11-23 20:44:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:25,375 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:44:25,376 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:44:25,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:44:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:44:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-11-23 20:44:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:44:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2019-11-23 20:44:25,385 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2019-11-23 20:44:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:25,385 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2019-11-23 20:44:25,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:44:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2019-11-23 20:44:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:44:25,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:25,386 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:25,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:25,591 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:25,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2055049395, now seen corresponding path program 11 times [2019-11-23 20:44:25,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:25,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553707539] [2019-11-23 20:44:25,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:44:25,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553707539] [2019-11-23 20:44:25,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478628452] [2019-11-23 20:44:25,732 INFO L92 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 [2019-11-23 20:44:45,539 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:44:45,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:45,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:44:45,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:44:45,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:45,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:44:45,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787616695] [2019-11-23 20:44:45,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:44:45,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:45,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:44:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:44:45,583 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 15 states. [2019-11-23 20:44:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:45,737 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2019-11-23 20:44:45,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:44:45,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2019-11-23 20:44:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:45,738 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:44:45,738 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:44:45,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:44:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:44:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-11-23 20:44:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:44:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2019-11-23 20:44:45,745 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2019-11-23 20:44:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:45,745 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2019-11-23 20:44:45,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:44:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2019-11-23 20:44:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:44:45,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:45,746 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:45,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:45,958 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1898335605, now seen corresponding path program 12 times [2019-11-23 20:44:45,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:45,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866579320] [2019-11-23 20:44:45,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:44:46,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866579320] [2019-11-23 20:44:46,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707574539] [2019-11-23 20:44:46,120 INFO L92 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 [2019-11-23 20:45:02,079 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:45:02,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:45:02,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:45:02,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:45:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:45:02,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:45:02,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:45:02,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757612970] [2019-11-23 20:45:02,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:45:02,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:45:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:45:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:45:02,114 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 16 states. [2019-11-23 20:45:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:45:02,274 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2019-11-23 20:45:02,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:45:02,275 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-11-23 20:45:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:45:02,276 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:45:02,276 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:45:02,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:45:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:45:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2019-11-23 20:45:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:45:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2019-11-23 20:45:02,283 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 70 [2019-11-23 20:45:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:45:02,283 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2019-11-23 20:45:02,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:45:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2019-11-23 20:45:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:45:02,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:45:02,284 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:45:02,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:02,485 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:45:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:45:02,486 INFO L82 PathProgramCache]: Analyzing trace with hash -684578935, now seen corresponding path program 13 times [2019-11-23 20:45:02,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:45:02,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025128037] [2019-11-23 20:45:02,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:45:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:45:02,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025128037] [2019-11-23 20:45:02,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238377598] [2019-11-23 20:45:02,663 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-11-23 20:45:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:02,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:45:02,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:45:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:45:02,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:45:02,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:45:02,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348548609] [2019-11-23 20:45:02,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:45:02,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:45:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:45:02,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:45:02,740 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 17 states. [2019-11-23 20:45:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:45:02,902 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2019-11-23 20:45:02,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:45:02,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-11-23 20:45:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:45:02,910 INFO L225 Difference]: With dead ends: 135 [2019-11-23 20:45:02,910 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:45:02,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:45:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:45:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-11-23 20:45:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:45:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2019-11-23 20:45:02,916 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 75 [2019-11-23 20:45:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:45:02,916 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2019-11-23 20:45:02,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:45:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2019-11-23 20:45:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:45:02,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:45:02,918 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:45:03,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:03,121 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:45:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:45:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1002487495, now seen corresponding path program 14 times [2019-11-23 20:45:03,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:45:03,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926721739] [2019-11-23 20:45:03,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:45:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:45:03,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926721739] [2019-11-23 20:45:03,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626314701] [2019-11-23 20:45:03,357 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:03,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:45:03,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:45:03,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:45:03,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:45:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:45:03,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:45:03,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:45:03,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859137556] [2019-11-23 20:45:03,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:45:03,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:45:03,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:45:03,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:45:03,461 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 18 states. [2019-11-23 20:45:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:45:03,634 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2019-11-23 20:45:03,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:45:03,634 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2019-11-23 20:45:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:45:03,635 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:45:03,636 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:45:03,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:45:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:45:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2019-11-23 20:45:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:45:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2019-11-23 20:45:03,641 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2019-11-23 20:45:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:45:03,641 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2019-11-23 20:45:03,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:45:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2019-11-23 20:45:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:45:03,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:45:03,643 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:45:03,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:03,847 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:45:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:45:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1385924667, now seen corresponding path program 15 times [2019-11-23 20:45:03,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:45:03,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888314582] [2019-11-23 20:45:03,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:45:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:45:04,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888314582] [2019-11-23 20:45:04,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043833649] [2019-11-23 20:45:04,038 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true