/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/reducercommutativity/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:28:09,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:28:09,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:28:09,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:28:09,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:28:09,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:28:09,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:28:09,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:28:09,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:28:09,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:28:09,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:28:09,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:28:09,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:28:09,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:28:09,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:28:09,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:28:09,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:28:09,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:28:09,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:28:09,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:28:09,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:28:09,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:28:09,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:28:09,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:28:09,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:28:09,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:28:09,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:28:09,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:28:09,330 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 22:28:09,351 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:28:09,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:28:09,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:28:09,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:28:09,353 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:28:09,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:28:09,354 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:28:09,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:28:09,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:28:09,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:28:09,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:28:09,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:28:09,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:28:09,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:28:09,356 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:28:09,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:28:09,357 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:28:09,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:28:09,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:28:09,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:28:09,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:28:09,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:28:09,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:28:09,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:28:09,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:28:09,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:28:09,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:28:09,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:28:09,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:28:09,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:28:09,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:28:09,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:28:09,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:28:09,654 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:28:09,654 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:28:09,655 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-23 22:28:09,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc80a0a9/d1d513cd56a542a58b3aa2143233f3dc/FLAG8d1b7a19d [2019-11-23 22:28:10,131 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:28:10,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-23 22:28:10,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc80a0a9/d1d513cd56a542a58b3aa2143233f3dc/FLAG8d1b7a19d [2019-11-23 22:28:10,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc80a0a9/d1d513cd56a542a58b3aa2143233f3dc [2019-11-23 22:28:10,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:28:10,537 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:28:10,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:28:10,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:28:10,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:28:10,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21140bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10, skipping insertion in model container [2019-11-23 22:28:10,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:28:10,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:28:10,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:28:10,774 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:28:10,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:28:10,809 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:28:10,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10 WrapperNode [2019-11-23 22:28:10,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:28:10,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:28:10,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:28:10,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:28:10,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:28:10,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:28:10,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:28:10,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:28:10,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... [2019-11-23 22:28:10,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:28:10,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:28:10,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:28:10,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:28:10,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:28:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:28:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:28:11,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:28:11,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:28:11,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:28:11,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:28:11,365 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:28:11,366 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:28:11,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:11 BoogieIcfgContainer [2019-11-23 22:28:11,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:28:11,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:28:11,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:28:11,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:28:11,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:28:10" (1/3) ... [2019-11-23 22:28:11,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ca56b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:11, skipping insertion in model container [2019-11-23 22:28:11,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:10" (2/3) ... [2019-11-23 22:28:11,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ca56b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:11, skipping insertion in model container [2019-11-23 22:28:11,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:11" (3/3) ... [2019-11-23 22:28:11,375 INFO L109 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2019-11-23 22:28:11,382 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:28:11,388 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:28:11,398 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:28:11,418 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:28:11,418 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:28:11,418 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:28:11,419 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:28:11,419 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:28:11,419 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:28:11,419 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:28:11,419 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:28:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 22:28:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:28:11,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:11,437 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:11,437 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:11,442 INFO L82 PathProgramCache]: Analyzing trace with hash -23080620, now seen corresponding path program 1 times [2019-11-23 22:28:11,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:11,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236853856] [2019-11-23 22:28:11,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:11,571 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 22:28:11,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236853856] [2019-11-23 22:28:11,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:11,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:28:11,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614280215] [2019-11-23 22:28:11,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:28:11,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:11,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:28:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:28:11,596 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-23 22:28:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:11,620 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2019-11-23 22:28:11,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:28:11,622 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-23 22:28:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:11,632 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:28:11,633 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:28:11,638 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 22:28:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:28:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:28:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:28:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 22:28:11,676 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2019-11-23 22:28:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:11,677 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 22:28:11,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:28:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 22:28:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:28:11,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:11,678 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:11,679 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1060874985, now seen corresponding path program 1 times [2019-11-23 22:28:11,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:11,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778577953] [2019-11-23 22:28:11,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:11,768 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 22:28:11,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778577953] [2019-11-23 22:28:11,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:11,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:28:11,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502375456] [2019-11-23 22:28:11,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:28:11,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:11,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:28:11,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:11,772 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 3 states. [2019-11-23 22:28:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:11,796 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-11-23 22:28:11,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:28:11,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:28:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:11,797 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:28:11,798 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:28:11,799 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 22:28:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:28:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:28:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:28:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2019-11-23 22:28:11,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2019-11-23 22:28:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:11,805 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2019-11-23 22:28:11,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:28:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2019-11-23 22:28:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:28:11,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:11,807 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:11,807 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash -507200985, now seen corresponding path program 1 times [2019-11-23 22:28:11,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:11,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112550066] [2019-11-23 22:28:11,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:28:11,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112550066] [2019-11-23 22:28:11,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:11,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:28:11,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280548882] [2019-11-23 22:28:11,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:28:11,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:28:11,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:11,872 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 3 states. [2019-11-23 22:28:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:11,941 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-23 22:28:11,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:28:11,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:28:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:11,942 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:28:11,942 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:28:11,943 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 22:28:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:28:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-11-23 22:28:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:28:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 22:28:11,949 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2019-11-23 22:28:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:11,949 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 22:28:11,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:28:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 22:28:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:28:11,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:11,951 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:11,951 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:11,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1833868074, now seen corresponding path program 1 times [2019-11-23 22:28:11,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:11,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736379354] [2019-11-23 22:28:11,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:12,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736379354] [2019-11-23 22:28:12,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:12,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:28:12,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623006421] [2019-11-23 22:28:12,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:28:12,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:12,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:28:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:12,054 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-11-23 22:28:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:12,069 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-11-23 22:28:12,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:28:12,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-23 22:28:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:12,070 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:28:12,070 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:28:12,071 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 22:28:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:28:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 22:28:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:28:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-23 22:28:12,076 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2019-11-23 22:28:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:12,077 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-23 22:28:12,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:28:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-23 22:28:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:28:12,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:12,078 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:12,078 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1777663060, now seen corresponding path program 1 times [2019-11-23 22:28:12,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:12,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112222359] [2019-11-23 22:28:12,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:12,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112222359] [2019-11-23 22:28:12,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375547445] [2019-11-23 22:28:12,173 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 22:28:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:12,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:28:12,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:12,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:12,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:28:12,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788805261] [2019-11-23 22:28:12,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:28:12,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:12,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:28:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:28:12,339 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-11-23 22:28:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:12,366 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-11-23 22:28:12,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:28:12,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-23 22:28:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:12,367 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:28:12,367 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:28:12,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 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 22:28:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:28:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 22:28:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:28:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-23 22:28:12,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2019-11-23 22:28:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:12,374 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-23 22:28:12,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:28:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-23 22:28:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:28:12,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:12,376 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:12,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:12,581 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash -861329106, now seen corresponding path program 2 times [2019-11-23 22:28:12,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:12,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379941881] [2019-11-23 22:28:12,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:12,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379941881] [2019-11-23 22:28:12,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837274054] [2019-11-23 22:28:12,686 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 22:28:12,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:12,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:12,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:12,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:12,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:12,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:28:12,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697071199] [2019-11-23 22:28:12,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:28:12,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:12,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:28:12,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:12,771 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2019-11-23 22:28:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:12,801 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2019-11-23 22:28:12,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:28:12,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-23 22:28:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:12,803 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:28:12,803 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:28:12,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 22:28:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:28:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 22:28:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:28:12,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-23 22:28:12,809 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 32 [2019-11-23 22:28:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:12,809 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-23 22:28:12,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:28:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-23 22:28:12,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:28:12,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:12,811 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:13,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:13,022 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:13,023 INFO L82 PathProgramCache]: Analyzing trace with hash -732694992, now seen corresponding path program 3 times [2019-11-23 22:28:13,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:13,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999247924] [2019-11-23 22:28:13,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:13,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999247924] [2019-11-23 22:28:13,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009387215] [2019-11-23 22:28:13,128 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 22:28:13,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:28:13,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:13,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:28:13,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:28:13,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:13,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:28:13,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179405653] [2019-11-23 22:28:13,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:28:13,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:28:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:13,241 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 8 states. [2019-11-23 22:28:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:13,334 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2019-11-23 22:28:13,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:28:13,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2019-11-23 22:28:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:13,336 INFO L225 Difference]: With dead ends: 79 [2019-11-23 22:28:13,336 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:28:13,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:13,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:28:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2019-11-23 22:28:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:28:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-23 22:28:13,342 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 34 [2019-11-23 22:28:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:13,343 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-23 22:28:13,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:28:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-23 22:28:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:28:13,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:13,344 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:13,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:13,548 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:13,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1535236799, now seen corresponding path program 4 times [2019-11-23 22:28:13,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:13,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135038377] [2019-11-23 22:28:13,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:28:13,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135038377] [2019-11-23 22:28:13,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156514886] [2019-11-23 22:28:13,635 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 22:28:13,707 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:13,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:13,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:13,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 22:28:13,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:13,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:28:13,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236676576] [2019-11-23 22:28:13,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:13,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:13,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:13,752 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 10 states. [2019-11-23 22:28:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:13,858 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2019-11-23 22:28:13,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:13,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-23 22:28:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:13,859 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:28:13,860 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:28:13,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:28:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2019-11-23 22:28:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:28:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2019-11-23 22:28:13,868 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 45 [2019-11-23 22:28:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:13,868 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2019-11-23 22:28:13,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2019-11-23 22:28:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:28:13,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:13,870 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:14,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:14,071 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:14,071 INFO L82 PathProgramCache]: Analyzing trace with hash -326050476, now seen corresponding path program 5 times [2019-11-23 22:28:14,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:14,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936480075] [2019-11-23 22:28:14,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 22:28:14,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936480075] [2019-11-23 22:28:14,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282833127] [2019-11-23 22:28:14,233 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 22:28:14,319 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:28:14,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:14,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:14,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 22:28:14,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:14,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:28:14,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150311614] [2019-11-23 22:28:14,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:28:14,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:14,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:28:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:14,380 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 12 states. [2019-11-23 22:28:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:14,523 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2019-11-23 22:28:14,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:28:14,524 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2019-11-23 22:28:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:14,524 INFO L225 Difference]: With dead ends: 119 [2019-11-23 22:28:14,525 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:28:14,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:28:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2019-11-23 22:28:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:28:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2019-11-23 22:28:14,542 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 56 [2019-11-23 22:28:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:14,543 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2019-11-23 22:28:14,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:28:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2019-11-23 22:28:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:28:14,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:14,544 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:14,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:14,745 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash 54449435, now seen corresponding path program 6 times [2019-11-23 22:28:14,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:14,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006283775] [2019-11-23 22:28:14,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 22:28:14,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006283775] [2019-11-23 22:28:14,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565967526] [2019-11-23 22:28:14,873 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 22:28:14,936 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:28:14,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:14,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:28:14,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 22:28:14,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:14,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-11-23 22:28:14,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761430472] [2019-11-23 22:28:14,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:14,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:14,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:14,983 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 11 states. [2019-11-23 22:28:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:15,048 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2019-11-23 22:28:15,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:28:15,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2019-11-23 22:28:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:15,050 INFO L225 Difference]: With dead ends: 127 [2019-11-23 22:28:15,050 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:28:15,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:28:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-11-23 22:28:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:28:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2019-11-23 22:28:15,067 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 67 [2019-11-23 22:28:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:15,067 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2019-11-23 22:28:15,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2019-11-23 22:28:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:28:15,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:15,073 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:15,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:15,277 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2069670231, now seen corresponding path program 7 times [2019-11-23 22:28:15,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:15,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418475054] [2019-11-23 22:28:15,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:15,419 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 22:28:15,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418475054] [2019-11-23 22:28:15,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851210597] [2019-11-23 22:28:15,420 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 22:28:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:15,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:15,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:15,554 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 22:28:15,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:15,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:28:15,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539579973] [2019-11-23 22:28:15,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:15,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:15,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:15,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:15,558 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 11 states. [2019-11-23 22:28:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:15,598 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2019-11-23 22:28:15,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:15,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2019-11-23 22:28:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:15,599 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:28:15,599 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:28:15,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 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 22:28:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:28:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 22:28:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 22:28:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2019-11-23 22:28:15,609 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 71 [2019-11-23 22:28:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:15,610 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2019-11-23 22:28:15,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2019-11-23 22:28:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 22:28:15,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:15,617 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:15,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:15,826 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:15,827 INFO L82 PathProgramCache]: Analyzing trace with hash 814816789, now seen corresponding path program 8 times [2019-11-23 22:28:15,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:15,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582811401] [2019-11-23 22:28:15,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:15,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582811401] [2019-11-23 22:28:15,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030129541] [2019-11-23 22:28:15,966 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 22:28:16,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:16,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:16,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:16,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:16,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:16,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:28:16,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86023366] [2019-11-23 22:28:16,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:28:16,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:28:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:16,100 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 12 states. [2019-11-23 22:28:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:16,149 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2019-11-23 22:28:16,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:28:16,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-11-23 22:28:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:16,153 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:28:16,154 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 22:28:16,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 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 22:28:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 22:28:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-11-23 22:28:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 22:28:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2019-11-23 22:28:16,167 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 73 [2019-11-23 22:28:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:16,167 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2019-11-23 22:28:16,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:28:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2019-11-23 22:28:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 22:28:16,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:16,168 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:16,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:16,369 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1786469203, now seen corresponding path program 9 times [2019-11-23 22:28:16,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:16,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342479165] [2019-11-23 22:28:16,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:16,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342479165] [2019-11-23 22:28:16,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687318603] [2019-11-23 22:28:16,506 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 22:28:16,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:28:16,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:16,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:16,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 22:28:16,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:16,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-23 22:28:16,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433743727] [2019-11-23 22:28:16,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:28:16,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:16,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:28:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:16,620 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 15 states. [2019-11-23 22:28:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:16,696 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2019-11-23 22:28:16,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:28:16,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2019-11-23 22:28:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:16,698 INFO L225 Difference]: With dead ends: 137 [2019-11-23 22:28:16,698 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:28:16,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:28:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-11-23 22:28:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:28:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2019-11-23 22:28:16,710 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 75 [2019-11-23 22:28:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:16,711 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2019-11-23 22:28:16,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:28:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2019-11-23 22:28:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:28:16,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:16,713 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:16,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:16,919 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:16,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1423401871, now seen corresponding path program 10 times [2019-11-23 22:28:16,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:16,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660385286] [2019-11-23 22:28:16,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 22:28:17,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660385286] [2019-11-23 22:28:17,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39280205] [2019-11-23 22:28:17,093 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 22:28:17,174 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:17,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:17,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:17,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 22:28:17,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:17,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-11-23 22:28:17,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25944015] [2019-11-23 22:28:17,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:28:17,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:28:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:17,284 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 18 states. [2019-11-23 22:28:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:17,439 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2019-11-23 22:28:17,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:28:17,440 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-23 22:28:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:17,441 INFO L225 Difference]: With dead ends: 155 [2019-11-23 22:28:17,441 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:28:17,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:28:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2019-11-23 22:28:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 22:28:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2019-11-23 22:28:17,447 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 79 [2019-11-23 22:28:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:17,448 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2019-11-23 22:28:17,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:28:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2019-11-23 22:28:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 22:28:17,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:17,449 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:17,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:17,654 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash 647910148, now seen corresponding path program 11 times [2019-11-23 22:28:17,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:17,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004329748] [2019-11-23 22:28:17,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-23 22:28:17,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004329748] [2019-11-23 22:28:17,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266798585] [2019-11-23 22:28:17,877 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 22:28:18,200 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:28:18,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:18,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:18,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:28:18,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:18,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2019-11-23 22:28:18,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867995676] [2019-11-23 22:28:18,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:28:18,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:18,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:28:18,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:18,280 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 18 states. [2019-11-23 22:28:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:18,393 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2019-11-23 22:28:18,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:28:18,394 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2019-11-23 22:28:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:18,395 INFO L225 Difference]: With dead ends: 163 [2019-11-23 22:28:18,395 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 22:28:18,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 22:28:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-23 22:28:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:28:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2019-11-23 22:28:18,408 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2019-11-23 22:28:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:18,408 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2019-11-23 22:28:18,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:28:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2019-11-23 22:28:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:28:18,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:18,409 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:18,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:18,610 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1749882872, now seen corresponding path program 12 times [2019-11-23 22:28:18,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:18,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677387795] [2019-11-23 22:28:18,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 22:28:18,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677387795] [2019-11-23 22:28:18,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240688937] [2019-11-23 22:28:18,787 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 22:28:18,975 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:28:18,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:18,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:18,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 22:28:19,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:19,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:28:19,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037406632] [2019-11-23 22:28:19,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:28:19,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:28:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:19,080 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 20 states. [2019-11-23 22:28:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:19,179 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2019-11-23 22:28:19,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:28:19,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2019-11-23 22:28:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:19,180 INFO L225 Difference]: With dead ends: 169 [2019-11-23 22:28:19,181 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 22:28:19,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 22:28:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2019-11-23 22:28:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 22:28:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2019-11-23 22:28:19,186 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 94 [2019-11-23 22:28:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:19,186 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-11-23 22:28:19,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:28:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2019-11-23 22:28:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-23 22:28:19,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:19,187 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:19,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:19,392 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:19,393 INFO L82 PathProgramCache]: Analyzing trace with hash -115639540, now seen corresponding path program 13 times [2019-11-23 22:28:19,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:19,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957715522] [2019-11-23 22:28:19,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:19,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957715522] [2019-11-23 22:28:19,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968739940] [2019-11-23 22:28:19,575 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 22:28:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:19,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:19,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:19,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:19,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:28:19,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58519217] [2019-11-23 22:28:19,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:28:19,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:19,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:28:19,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:19,728 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 17 states. [2019-11-23 22:28:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:19,791 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2019-11-23 22:28:19,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:19,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2019-11-23 22:28:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:19,793 INFO L225 Difference]: With dead ends: 172 [2019-11-23 22:28:19,793 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 22:28:19,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 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 22:28:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 22:28:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-11-23 22:28:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:28:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2019-11-23 22:28:19,800 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 98 [2019-11-23 22:28:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:19,800 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2019-11-23 22:28:19,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:28:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2019-11-23 22:28:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:28:19,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:19,802 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:20,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:20,007 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:20,008 INFO L82 PathProgramCache]: Analyzing trace with hash 367132558, now seen corresponding path program 14 times [2019-11-23 22:28:20,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:20,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376335903] [2019-11-23 22:28:20,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:20,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376335903] [2019-11-23 22:28:20,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377377705] [2019-11-23 22:28:20,222 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 22:28:20,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:20,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:20,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:28:20,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:20,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:20,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:28:20,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91022765] [2019-11-23 22:28:20,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:28:20,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:20,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:28:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:20,353 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 18 states. [2019-11-23 22:28:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:20,412 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2019-11-23 22:28:20,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:28:20,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2019-11-23 22:28:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:20,414 INFO L225 Difference]: With dead ends: 174 [2019-11-23 22:28:20,414 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:28:20,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 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 22:28:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:28:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 22:28:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 22:28:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2019-11-23 22:28:20,418 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 100 [2019-11-23 22:28:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:20,418 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2019-11-23 22:28:20,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:28:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2019-11-23 22:28:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 22:28:20,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:20,420 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:20,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:20,623 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash 454650768, now seen corresponding path program 15 times [2019-11-23 22:28:20,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:20,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504085031] [2019-11-23 22:28:20,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:20,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504085031] [2019-11-23 22:28:20,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089989160] [2019-11-23 22:28:20,858 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 [2019-11-23 22:28:20,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:28:20,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:20,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:28:20,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-11-23 22:28:21,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:21,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:28:21,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576742356] [2019-11-23 22:28:21,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:28:21,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:21,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:28:21,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:28:21,095 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 24 states. [2019-11-23 22:28:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:21,327 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2019-11-23 22:28:21,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:28:21,327 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 102 [2019-11-23 22:28:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:21,328 INFO L225 Difference]: With dead ends: 191 [2019-11-23 22:28:21,328 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 22:28:21,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:28:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 22:28:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2019-11-23 22:28:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:28:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2019-11-23 22:28:21,333 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 102 [2019-11-23 22:28:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:21,334 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2019-11-23 22:28:21,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:28:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2019-11-23 22:28:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:28:21,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:21,335 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:21,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:21,540 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1442664353, now seen corresponding path program 16 times [2019-11-23 22:28:21,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:21,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975976638] [2019-11-23 22:28:21,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:21,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975976638] [2019-11-23 22:28:21,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375345922] [2019-11-23 22:28:21,807 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:21,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:21,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:21,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:28:21,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:21,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:21,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:28:21,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031514807] [2019-11-23 22:28:21,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:28:21,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:21,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:28:21,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:21,933 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 20 states. [2019-11-23 22:28:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:21,994 INFO L93 Difference]: Finished difference Result 196 states and 240 transitions. [2019-11-23 22:28:21,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:28:21,995 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2019-11-23 22:28:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:21,996 INFO L225 Difference]: With dead ends: 196 [2019-11-23 22:28:21,996 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:28:21,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:28:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 22:28:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:28:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2019-11-23 22:28:22,000 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 113 [2019-11-23 22:28:22,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:22,001 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2019-11-23 22:28:22,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:28:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2019-11-23 22:28:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:28:22,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:22,002 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:22,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:22,205 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1794529181, now seen corresponding path program 17 times [2019-11-23 22:28:22,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:22,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134551089] [2019-11-23 22:28:22,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:22,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134551089] [2019-11-23 22:28:22,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27823480] [2019-11-23 22:28:22,502 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:28:23,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:23,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:28:23,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:23,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:23,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:28:23,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989196173] [2019-11-23 22:28:23,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:28:23,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:23,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:28:23,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:28:23,598 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 21 states. [2019-11-23 22:28:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:23,668 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2019-11-23 22:28:23,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:28:23,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 115 [2019-11-23 22:28:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:23,670 INFO L225 Difference]: With dead ends: 198 [2019-11-23 22:28:23,670 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 22:28:23,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:28:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 22:28:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-11-23 22:28:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 22:28:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2019-11-23 22:28:23,675 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 115 [2019-11-23 22:28:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:23,675 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2019-11-23 22:28:23,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:28:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2019-11-23 22:28:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 22:28:23,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:23,677 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:23,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,882 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1113774245, now seen corresponding path program 18 times [2019-11-23 22:28:23,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:23,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398976414] [2019-11-23 22:28:23,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:24,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398976414] [2019-11-23 22:28:24,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107404655] [2019-11-23 22:28:24,191 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:24,538 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:28:24,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:24,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:28:24,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 22:28:24,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:24,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-23 22:28:24,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420481725] [2019-11-23 22:28:24,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:28:24,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:24,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:28:24,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:28:24,717 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand 27 states. [2019-11-23 22:28:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:24,852 INFO L93 Difference]: Finished difference Result 203 states and 248 transitions. [2019-11-23 22:28:24,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:28:24,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 117 [2019-11-23 22:28:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:24,854 INFO L225 Difference]: With dead ends: 203 [2019-11-23 22:28:24,854 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 22:28:24,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:28:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 22:28:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2019-11-23 22:28:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:28:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2019-11-23 22:28:24,858 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 117 [2019-11-23 22:28:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:24,859 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2019-11-23 22:28:24,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:28:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2019-11-23 22:28:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 22:28:24,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:24,860 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:25,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,065 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:25,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:25,065 INFO L82 PathProgramCache]: Analyzing trace with hash -591369833, now seen corresponding path program 19 times [2019-11-23 22:28:25,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:25,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724072379] [2019-11-23 22:28:25,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 22:28:25,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724072379] [2019-11-23 22:28:25,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560763582] [2019-11-23 22:28:25,371 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:25,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:28:25,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 22:28:25,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:25,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:28:25,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597511460] [2019-11-23 22:28:25,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:28:25,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:28:25,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:28:25,521 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 23 states. [2019-11-23 22:28:25,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:25,592 INFO L93 Difference]: Finished difference Result 205 states and 249 transitions. [2019-11-23 22:28:25,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:28:25,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2019-11-23 22:28:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:25,593 INFO L225 Difference]: With dead ends: 205 [2019-11-23 22:28:25,593 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 22:28:25,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:28:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 22:28:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-11-23 22:28:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 22:28:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2019-11-23 22:28:25,598 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 121 [2019-11-23 22:28:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:25,598 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2019-11-23 22:28:25,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:28:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2019-11-23 22:28:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 22:28:25,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:25,599 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:25,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,803 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:25,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2018512171, now seen corresponding path program 20 times [2019-11-23 22:28:25,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:25,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145818582] [2019-11-23 22:28:25,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:28:25,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145818582] [2019-11-23 22:28:25,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137726228] [2019-11-23 22:28:25,948 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:26,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:26,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:28:26,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2019-11-23 22:28:26,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:26,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-23 22:28:26,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533494410] [2019-11-23 22:28:26,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:28:26,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:28:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:26,164 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 16 states. [2019-11-23 22:28:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:26,310 INFO L93 Difference]: Finished difference Result 203 states and 249 transitions. [2019-11-23 22:28:26,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:26,311 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2019-11-23 22:28:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:26,313 INFO L225 Difference]: With dead ends: 203 [2019-11-23 22:28:26,313 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 22:28:26,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 22:28:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2019-11-23 22:28:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-23 22:28:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2019-11-23 22:28:26,319 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 123 [2019-11-23 22:28:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:26,319 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2019-11-23 22:28:26,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:28:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2019-11-23 22:28:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-23 22:28:26,320 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:26,320 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:26,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,524 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:26,525 INFO L82 PathProgramCache]: Analyzing trace with hash 848209086, now seen corresponding path program 21 times [2019-11-23 22:28:26,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:26,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564478307] [2019-11-23 22:28:26,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-23 22:28:26,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564478307] [2019-11-23 22:28:26,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591398011] [2019-11-23 22:28:26,676 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:28:26,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:26,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:28:26,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-23 22:28:26,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:26,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:28:26,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646375799] [2019-11-23 22:28:26,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:26,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:26,897 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand 11 states. [2019-11-23 22:28:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:26,944 INFO L93 Difference]: Finished difference Result 166 states and 199 transitions. [2019-11-23 22:28:26,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:26,947 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 134 [2019-11-23 22:28:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:26,948 INFO L225 Difference]: With dead ends: 166 [2019-11-23 22:28:26,948 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 22:28:26,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 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 22:28:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 22:28:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2019-11-23 22:28:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-23 22:28:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2019-11-23 22:28:26,953 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 134 [2019-11-23 22:28:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:26,953 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2019-11-23 22:28:26,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2019-11-23 22:28:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 22:28:26,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:26,954 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:27,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:27,159 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash -801641536, now seen corresponding path program 22 times [2019-11-23 22:28:27,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:27,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589876946] [2019-11-23 22:28:27,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2019-11-23 22:28:27,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589876946] [2019-11-23 22:28:27,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550445155] [2019-11-23 22:28:27,331 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:27,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:27,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:27,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:27,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2019-11-23 22:28:27,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:27,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:28:27,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132981762] [2019-11-23 22:28:27,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:27,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:27,475 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 11 states. [2019-11-23 22:28:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:27,575 INFO L93 Difference]: Finished difference Result 223 states and 273 transitions. [2019-11-23 22:28:27,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:27,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2019-11-23 22:28:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:27,577 INFO L225 Difference]: With dead ends: 223 [2019-11-23 22:28:27,577 INFO L226 Difference]: Without dead ends: 152 [2019-11-23 22:28:27,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 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 22:28:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-23 22:28:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2019-11-23 22:28:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 22:28:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2019-11-23 22:28:27,581 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 136 [2019-11-23 22:28:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:27,582 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2019-11-23 22:28:27,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2019-11-23 22:28:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 22:28:27,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:27,583 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:27,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:27,787 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash -456441807, now seen corresponding path program 23 times [2019-11-23 22:28:27,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:27,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234380266] [2019-11-23 22:28:27,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 22:28:27,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234380266] [2019-11-23 22:28:27,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922854492] [2019-11-23 22:28:27,969 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:30,716 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:28:30,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:30,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:30,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-11-23 22:28:30,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:30,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-23 22:28:30,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164438093] [2019-11-23 22:28:30,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:28:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:28:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:30,894 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand 20 states. [2019-11-23 22:28:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:31,080 INFO L93 Difference]: Finished difference Result 241 states and 297 transitions. [2019-11-23 22:28:31,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:28:31,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2019-11-23 22:28:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:31,082 INFO L225 Difference]: With dead ends: 241 [2019-11-23 22:28:31,082 INFO L226 Difference]: Without dead ends: 164 [2019-11-23 22:28:31,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-23 22:28:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2019-11-23 22:28:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-23 22:28:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2019-11-23 22:28:31,087 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 145 [2019-11-23 22:28:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:31,087 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2019-11-23 22:28:31,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:28:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2019-11-23 22:28:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-23 22:28:31,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:31,089 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:31,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:31,296 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1788255902, now seen corresponding path program 24 times [2019-11-23 22:28:31,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:31,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28364333] [2019-11-23 22:28:31,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 22:28:31,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28364333] [2019-11-23 22:28:31,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661571136] [2019-11-23 22:28:31,519 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:33,131 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:28:33,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:33,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:33,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-23 22:28:33,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:33,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:28:33,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779147496] [2019-11-23 22:28:33,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:28:33,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:33,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:28:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:28:33,164 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand 13 states. [2019-11-23 22:28:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:33,287 INFO L93 Difference]: Finished difference Result 257 states and 317 transitions. [2019-11-23 22:28:33,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:28:33,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2019-11-23 22:28:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:33,289 INFO L225 Difference]: With dead ends: 257 [2019-11-23 22:28:33,289 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 22:28:33,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 156 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 22:28:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 22:28:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2019-11-23 22:28:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 22:28:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2019-11-23 22:28:33,295 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 156 [2019-11-23 22:28:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:33,295 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2019-11-23 22:28:33,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:28:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2019-11-23 22:28:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-23 22:28:33,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:33,296 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:33,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:33,502 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2064447985, now seen corresponding path program 25 times [2019-11-23 22:28:33,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:33,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342953924] [2019-11-23 22:28:33,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2019-11-23 22:28:33,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342953924] [2019-11-23 22:28:33,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185010496] [2019-11-23 22:28:33,711 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:33,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:28:33,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2019-11-23 22:28:33,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:33,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:28:33,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206377386] [2019-11-23 22:28:33,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:28:33,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:28:33,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:28:33,888 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand 14 states. [2019-11-23 22:28:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:33,996 INFO L93 Difference]: Finished difference Result 272 states and 337 transitions. [2019-11-23 22:28:33,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:28:33,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 165 [2019-11-23 22:28:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:33,998 INFO L225 Difference]: With dead ends: 272 [2019-11-23 22:28:33,998 INFO L226 Difference]: Without dead ends: 181 [2019-11-23 22:28:33,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 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 22:28:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-23 22:28:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2019-11-23 22:28:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 22:28:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2019-11-23 22:28:34,005 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 165 [2019-11-23 22:28:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:34,005 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2019-11-23 22:28:34,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:28:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2019-11-23 22:28:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-23 22:28:34,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:34,007 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:34,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:34,212 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1282998142, now seen corresponding path program 26 times [2019-11-23 22:28:34,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:34,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247441706] [2019-11-23 22:28:34,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2019-11-23 22:28:34,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247441706] [2019-11-23 22:28:34,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361007345] [2019-11-23 22:28:34,572 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:34,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:34,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:34,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:28:34,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2019-11-23 22:28:34,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:34,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 22:28:34,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779889356] [2019-11-23 22:28:34,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:28:34,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:28:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:34,793 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand 15 states. [2019-11-23 22:28:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:34,924 INFO L93 Difference]: Finished difference Result 287 states and 357 transitions. [2019-11-23 22:28:34,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:28:34,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 174 [2019-11-23 22:28:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:34,926 INFO L225 Difference]: With dead ends: 287 [2019-11-23 22:28:34,926 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 22:28:34,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 22:28:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2019-11-23 22:28:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 22:28:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 224 transitions. [2019-11-23 22:28:34,933 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 224 transitions. Word has length 174 [2019-11-23 22:28:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:34,933 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 224 transitions. [2019-11-23 22:28:34,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:28:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 224 transitions. [2019-11-23 22:28:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:28:34,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:34,934 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:35,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:35,138 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1371637359, now seen corresponding path program 27 times [2019-11-23 22:28:35,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:35,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16018337] [2019-11-23 22:28:35,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2019-11-23 22:28:35,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16018337] [2019-11-23 22:28:35,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834669555] [2019-11-23 22:28:35,386 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:35,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:28:35,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:35,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:28:35,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2019-11-23 22:28:35,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:35,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2019-11-23 22:28:35,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721498924] [2019-11-23 22:28:35,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:28:35,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:35,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:28:35,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:28:35,992 INFO L87 Difference]: Start difference. First operand 184 states and 224 transitions. Second operand 25 states. [2019-11-23 22:28:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:36,165 INFO L93 Difference]: Finished difference Result 305 states and 381 transitions. [2019-11-23 22:28:36,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:28:36,165 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 183 [2019-11-23 22:28:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:36,166 INFO L225 Difference]: With dead ends: 305 [2019-11-23 22:28:36,166 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 22:28:36,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:28:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 22:28:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2019-11-23 22:28:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-11-23 22:28:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 238 transitions. [2019-11-23 22:28:36,172 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 238 transitions. Word has length 183 [2019-11-23 22:28:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:36,172 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 238 transitions. [2019-11-23 22:28:36,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:28:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 238 transitions. [2019-11-23 22:28:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-23 22:28:36,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:36,174 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:36,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:36,379 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:36,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1344637220, now seen corresponding path program 28 times [2019-11-23 22:28:36,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:36,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410031532] [2019-11-23 22:28:36,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2019-11-23 22:28:36,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410031532] [2019-11-23 22:28:36,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972855438] [2019-11-23 22:28:36,713 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:36,851 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:36,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:36,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:36,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2019-11-23 22:28:36,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:36,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:28:36,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350062649] [2019-11-23 22:28:36,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:28:36,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:36,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:28:36,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:36,892 INFO L87 Difference]: Start difference. First operand 195 states and 238 transitions. Second operand 17 states. [2019-11-23 22:28:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:37,081 INFO L93 Difference]: Finished difference Result 321 states and 401 transitions. [2019-11-23 22:28:37,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:37,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 194 [2019-11-23 22:28:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:37,083 INFO L225 Difference]: With dead ends: 321 [2019-11-23 22:28:37,083 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 22:28:37,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 194 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 22:28:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 22:28:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2019-11-23 22:28:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 22:28:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 250 transitions. [2019-11-23 22:28:37,089 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 250 transitions. Word has length 194 [2019-11-23 22:28:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:37,090 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 250 transitions. [2019-11-23 22:28:37,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:28:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 250 transitions. [2019-11-23 22:28:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 22:28:37,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:37,091 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:37,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:37,295 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:37,296 INFO L82 PathProgramCache]: Analyzing trace with hash 537160013, now seen corresponding path program 29 times [2019-11-23 22:28:37,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:37,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855282495] [2019-11-23 22:28:37,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2019-11-23 22:28:37,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855282495] [2019-11-23 22:28:37,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846858608] [2019-11-23 22:28:37,567 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:41,164 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:28:41,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:41,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:28:41,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2019-11-23 22:28:41,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:41,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-11-23 22:28:41,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769840612] [2019-11-23 22:28:41,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:28:41,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:41,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:28:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:28:41,468 INFO L87 Difference]: Start difference. First operand 204 states and 250 transitions. Second operand 28 states. [2019-11-23 22:28:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:41,768 INFO L93 Difference]: Finished difference Result 339 states and 425 transitions. [2019-11-23 22:28:41,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:28:41,768 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 203 [2019-11-23 22:28:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:41,770 INFO L225 Difference]: With dead ends: 339 [2019-11-23 22:28:41,770 INFO L226 Difference]: Without dead ends: 222 [2019-11-23 22:28:41,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:28:41,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-23 22:28:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2019-11-23 22:28:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-11-23 22:28:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 264 transitions. [2019-11-23 22:28:41,777 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 264 transitions. Word has length 203 [2019-11-23 22:28:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:41,777 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 264 transitions. [2019-11-23 22:28:41,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:28:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 264 transitions. [2019-11-23 22:28:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-23 22:28:41,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:41,779 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:41,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:41,987 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1315189178, now seen corresponding path program 30 times [2019-11-23 22:28:41,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:41,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190162192] [2019-11-23 22:28:41,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1181 trivial. 0 not checked. [2019-11-23 22:28:42,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190162192] [2019-11-23 22:28:42,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746330919] [2019-11-23 22:28:42,331 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:47,188 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:28:47,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:47,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:28:47,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1181 trivial. 0 not checked. [2019-11-23 22:28:47,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:47,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:28:47,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194404346] [2019-11-23 22:28:47,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:28:47,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:28:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:28:47,251 INFO L87 Difference]: Start difference. First operand 215 states and 264 transitions. Second operand 19 states. [2019-11-23 22:28:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:47,485 INFO L93 Difference]: Finished difference Result 355 states and 445 transitions. [2019-11-23 22:28:47,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:28:47,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 214 [2019-11-23 22:28:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:47,487 INFO L225 Difference]: With dead ends: 355 [2019-11-23 22:28:47,487 INFO L226 Difference]: Without dead ends: 230 [2019-11-23 22:28:47,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:28:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-11-23 22:28:47,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2019-11-23 22:28:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-11-23 22:28:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 276 transitions. [2019-11-23 22:28:47,494 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 276 transitions. Word has length 214 [2019-11-23 22:28:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:47,495 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 276 transitions. [2019-11-23 22:28:47,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:28:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 276 transitions. [2019-11-23 22:28:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-23 22:28:47,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:47,496 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:47,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:47,703 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2021298261, now seen corresponding path program 31 times [2019-11-23 22:28:47,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:47,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995427] [2019-11-23 22:28:47,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2019-11-23 22:28:48,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995427] [2019-11-23 22:28:48,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492627597] [2019-11-23 22:28:48,121 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:48,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:28:48,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2019-11-23 22:28:48,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:48,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:28:48,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883786245] [2019-11-23 22:28:48,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:28:48,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:28:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:48,306 INFO L87 Difference]: Start difference. First operand 224 states and 276 transitions. Second operand 20 states. [2019-11-23 22:28:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:48,489 INFO L93 Difference]: Finished difference Result 370 states and 465 transitions. [2019-11-23 22:28:48,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:28:48,490 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 223 [2019-11-23 22:28:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:48,491 INFO L225 Difference]: With dead ends: 370 [2019-11-23 22:28:48,491 INFO L226 Difference]: Without dead ends: 239 [2019-11-23 22:28:48,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-11-23 22:28:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2019-11-23 22:28:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-23 22:28:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 288 transitions. [2019-11-23 22:28:48,498 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 288 transitions. Word has length 223 [2019-11-23 22:28:48,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:48,498 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 288 transitions. [2019-11-23 22:28:48,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:28:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 288 transitions. [2019-11-23 22:28:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-23 22:28:48,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:48,500 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:48,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:48,704 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1746062746, now seen corresponding path program 32 times [2019-11-23 22:28:48,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:48,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001919684] [2019-11-23 22:28:48,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1675 trivial. 0 not checked. [2019-11-23 22:28:48,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001919684] [2019-11-23 22:28:48,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063397430] [2019-11-23 22:28:48,998 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:49,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:49,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:49,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:28:49,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1371 trivial. 0 not checked. [2019-11-23 22:28:49,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:49,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2019-11-23 22:28:49,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940186531] [2019-11-23 22:28:49,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:28:49,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:49,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:28:49,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:28:49,561 INFO L87 Difference]: Start difference. First operand 233 states and 288 transitions. Second operand 32 states. [2019-11-23 22:28:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:49,873 INFO L93 Difference]: Finished difference Result 388 states and 489 transitions. [2019-11-23 22:28:49,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:28:49,874 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 232 [2019-11-23 22:28:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:49,875 INFO L225 Difference]: With dead ends: 388 [2019-11-23 22:28:49,875 INFO L226 Difference]: Without dead ends: 251 [2019-11-23 22:28:49,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:28:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-11-23 22:28:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2019-11-23 22:28:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-11-23 22:28:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2019-11-23 22:28:49,881 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 232 [2019-11-23 22:28:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:49,881 INFO L462 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2019-11-23 22:28:49,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:28:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2019-11-23 22:28:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-23 22:28:49,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:49,883 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:50,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:50,087 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:50,087 INFO L82 PathProgramCache]: Analyzing trace with hash 695335305, now seen corresponding path program 33 times [2019-11-23 22:28:50,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:50,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296817603] [2019-11-23 22:28:50,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1975 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2019-11-23 22:28:50,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296817603] [2019-11-23 22:28:50,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905696723] [2019-11-23 22:28:50,588 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:51,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-11-23 22:28:51,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:51,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:28:51,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1975 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1831 trivial. 0 not checked. [2019-11-23 22:28:51,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:51,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2019-11-23 22:28:51,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453579310] [2019-11-23 22:28:51,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:28:51,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:28:51,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:28:51,719 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand 34 states. [2019-11-23 22:28:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:52,136 INFO L93 Difference]: Finished difference Result 407 states and 513 transitions. [2019-11-23 22:28:52,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:28:52,136 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 243 [2019-11-23 22:28:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:52,138 INFO L225 Difference]: With dead ends: 407 [2019-11-23 22:28:52,138 INFO L226 Difference]: Without dead ends: 262 [2019-11-23 22:28:52,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:28:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-11-23 22:28:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2019-11-23 22:28:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-11-23 22:28:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 316 transitions. [2019-11-23 22:28:52,145 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 316 transitions. Word has length 243 [2019-11-23 22:28:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:52,145 INFO L462 AbstractCegarLoop]: Abstraction has 255 states and 316 transitions. [2019-11-23 22:28:52,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:28:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 316 transitions. [2019-11-23 22:28:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-11-23 22:28:52,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:52,147 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:52,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:52,347 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2038297078, now seen corresponding path program 34 times [2019-11-23 22:28:52,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:52,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292205630] [2019-11-23 22:28:52,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1633 trivial. 0 not checked. [2019-11-23 22:28:52,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292205630] [2019-11-23 22:28:52,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322305969] [2019-11-23 22:28:52,898 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:53,088 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:53,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:53,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:28:53,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1633 trivial. 0 not checked. [2019-11-23 22:28:53,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:53,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:28:53,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547924961] [2019-11-23 22:28:53,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:28:53,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:53,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:28:53,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:28:53,146 INFO L87 Difference]: Start difference. First operand 255 states and 316 transitions. Second operand 23 states. [2019-11-23 22:28:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:53,389 INFO L93 Difference]: Finished difference Result 417 states and 524 transitions. [2019-11-23 22:28:53,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:28:53,390 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 254 [2019-11-23 22:28:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:53,392 INFO L225 Difference]: With dead ends: 417 [2019-11-23 22:28:53,392 INFO L226 Difference]: Without dead ends: 264 [2019-11-23 22:28:53,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:28:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-11-23 22:28:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2019-11-23 22:28:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2019-11-23 22:28:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 328 transitions. [2019-11-23 22:28:53,399 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 328 transitions. Word has length 254 [2019-11-23 22:28:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:53,400 INFO L462 AbstractCegarLoop]: Abstraction has 264 states and 328 transitions. [2019-11-23 22:28:53,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:28:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 328 transitions. [2019-11-23 22:28:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-11-23 22:28:53,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:53,401 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:53,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:53,606 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash -613456153, now seen corresponding path program 35 times [2019-11-23 22:28:53,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:53,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886614891] [2019-11-23 22:28:53,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:28:54,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886614891] [2019-11-23 22:28:54,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646382505] [2019-11-23 22:28:54,081 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:05,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:29:05,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:05,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:29:05,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:06,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:06,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:29:06,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694119087] [2019-11-23 22:29:06,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:29:06,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:06,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:29:06,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:06,034 INFO L87 Difference]: Start difference. First operand 264 states and 328 transitions. Second operand 17 states. [2019-11-23 22:29:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:06,099 INFO L93 Difference]: Finished difference Result 334 states and 419 transitions. [2019-11-23 22:29:06,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:06,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 263 [2019-11-23 22:29:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:06,101 INFO L225 Difference]: With dead ends: 334 [2019-11-23 22:29:06,101 INFO L226 Difference]: Without dead ends: 267 [2019-11-23 22:29:06,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 263 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 22:29:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-11-23 22:29:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2019-11-23 22:29:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2019-11-23 22:29:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 330 transitions. [2019-11-23 22:29:06,107 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 330 transitions. Word has length 263 [2019-11-23 22:29:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:06,107 INFO L462 AbstractCegarLoop]: Abstraction has 266 states and 330 transitions. [2019-11-23 22:29:06,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:29:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 330 transitions. [2019-11-23 22:29:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-11-23 22:29:06,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:06,109 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:06,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:06,319 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:06,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:06,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1494206491, now seen corresponding path program 36 times [2019-11-23 22:29:06,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:06,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978843105] [2019-11-23 22:29:06,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:06,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978843105] [2019-11-23 22:29:06,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42984610] [2019-11-23 22:29:06,752 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:17,132 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:29:17,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:17,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:29:17,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:17,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:17,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:29:17,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994436682] [2019-11-23 22:29:17,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:29:17,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:29:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:17,196 INFO L87 Difference]: Start difference. First operand 266 states and 330 transitions. Second operand 18 states. [2019-11-23 22:29:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:17,286 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2019-11-23 22:29:17,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:29:17,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 265 [2019-11-23 22:29:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:17,288 INFO L225 Difference]: With dead ends: 336 [2019-11-23 22:29:17,288 INFO L226 Difference]: Without dead ends: 269 [2019-11-23 22:29:17,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 265 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 22:29:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-11-23 22:29:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2019-11-23 22:29:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-11-23 22:29:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 332 transitions. [2019-11-23 22:29:17,294 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 332 transitions. Word has length 265 [2019-11-23 22:29:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:17,295 INFO L462 AbstractCegarLoop]: Abstraction has 268 states and 332 transitions. [2019-11-23 22:29:17,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:29:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 332 transitions. [2019-11-23 22:29:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-23 22:29:17,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:17,297 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:17,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:17,507 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1786723997, now seen corresponding path program 37 times [2019-11-23 22:29:17,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:17,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263706372] [2019-11-23 22:29:17,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:18,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263706372] [2019-11-23 22:29:18,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162344110] [2019-11-23 22:29:18,136 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:18,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:29:18,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:18,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:18,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:29:18,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798344360] [2019-11-23 22:29:18,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:29:18,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:29:18,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:18,425 INFO L87 Difference]: Start difference. First operand 268 states and 332 transitions. Second operand 19 states. [2019-11-23 22:29:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:18,504 INFO L93 Difference]: Finished difference Result 338 states and 423 transitions. [2019-11-23 22:29:18,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:29:18,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 267 [2019-11-23 22:29:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:18,506 INFO L225 Difference]: With dead ends: 338 [2019-11-23 22:29:18,506 INFO L226 Difference]: Without dead ends: 271 [2019-11-23 22:29:18,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-11-23 22:29:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2019-11-23 22:29:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2019-11-23 22:29:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 334 transitions. [2019-11-23 22:29:18,513 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 334 transitions. Word has length 267 [2019-11-23 22:29:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:18,513 INFO L462 AbstractCegarLoop]: Abstraction has 270 states and 334 transitions. [2019-11-23 22:29:18,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:29:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 334 transitions. [2019-11-23 22:29:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-11-23 22:29:18,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:18,515 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:18,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:18,720 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash 571794273, now seen corresponding path program 38 times [2019-11-23 22:29:18,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:18,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597231043] [2019-11-23 22:29:18,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:19,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597231043] [2019-11-23 22:29:19,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267928547] [2019-11-23 22:29:19,168 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:19,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:19,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:19,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:29:19,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:19,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:19,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:29:19,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957051679] [2019-11-23 22:29:19,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:29:19,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:29:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:19,443 INFO L87 Difference]: Start difference. First operand 270 states and 334 transitions. Second operand 20 states. [2019-11-23 22:29:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:19,568 INFO L93 Difference]: Finished difference Result 340 states and 425 transitions. [2019-11-23 22:29:19,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:29:19,569 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 269 [2019-11-23 22:29:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:19,570 INFO L225 Difference]: With dead ends: 340 [2019-11-23 22:29:19,571 INFO L226 Difference]: Without dead ends: 273 [2019-11-23 22:29:19,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-11-23 22:29:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2019-11-23 22:29:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2019-11-23 22:29:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 336 transitions. [2019-11-23 22:29:19,576 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 336 transitions. Word has length 269 [2019-11-23 22:29:19,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:19,577 INFO L462 AbstractCegarLoop]: Abstraction has 272 states and 336 transitions. [2019-11-23 22:29:19,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:29:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 336 transitions. [2019-11-23 22:29:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-23 22:29:19,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:19,579 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:19,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:19,783 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash -634880545, now seen corresponding path program 39 times [2019-11-23 22:29:19,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:19,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041323673] [2019-11-23 22:29:19,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:20,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041323673] [2019-11-23 22:29:20,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517803365] [2019-11-23 22:29:20,271 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:23,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 22:29:23,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:23,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:29:23,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:23,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:23,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:29:23,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232111999] [2019-11-23 22:29:23,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:29:23,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:23,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:29:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:29:23,103 INFO L87 Difference]: Start difference. First operand 272 states and 336 transitions. Second operand 21 states. [2019-11-23 22:29:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:23,194 INFO L93 Difference]: Finished difference Result 342 states and 427 transitions. [2019-11-23 22:29:23,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:29:23,195 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 271 [2019-11-23 22:29:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:23,197 INFO L225 Difference]: With dead ends: 342 [2019-11-23 22:29:23,197 INFO L226 Difference]: Without dead ends: 275 [2019-11-23 22:29:23,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:29:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-11-23 22:29:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2019-11-23 22:29:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-11-23 22:29:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 338 transitions. [2019-11-23 22:29:23,203 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 338 transitions. Word has length 271 [2019-11-23 22:29:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:23,204 INFO L462 AbstractCegarLoop]: Abstraction has 274 states and 338 transitions. [2019-11-23 22:29:23,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:29:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 338 transitions. [2019-11-23 22:29:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-23 22:29:23,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:23,206 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:23,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:23,413 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash -608210723, now seen corresponding path program 40 times [2019-11-23 22:29:23,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:23,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375415329] [2019-11-23 22:29:23,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:23,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375415329] [2019-11-23 22:29:23,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760728269] [2019-11-23 22:29:23,968 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:24,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:24,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:24,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:29:24,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2019-11-23 22:29:24,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:24,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:29:24,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825689485] [2019-11-23 22:29:24,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:29:24,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:29:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:29:24,238 INFO L87 Difference]: Start difference. First operand 274 states and 338 transitions. Second operand 22 states. [2019-11-23 22:29:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:24,320 INFO L93 Difference]: Finished difference Result 343 states and 428 transitions. [2019-11-23 22:29:24,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:29:24,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 273 [2019-11-23 22:29:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:24,323 INFO L225 Difference]: With dead ends: 343 [2019-11-23 22:29:24,323 INFO L226 Difference]: Without dead ends: 276 [2019-11-23 22:29:24,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:29:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-11-23 22:29:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2019-11-23 22:29:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-11-23 22:29:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 340 transitions. [2019-11-23 22:29:24,330 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 340 transitions. Word has length 273 [2019-11-23 22:29:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:24,331 INFO L462 AbstractCegarLoop]: Abstraction has 276 states and 340 transitions. [2019-11-23 22:29:24,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:29:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 340 transitions. [2019-11-23 22:29:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-11-23 22:29:24,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:24,333 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:24,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:24,537 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash -748315557, now seen corresponding path program 41 times [2019-11-23 22:29:24,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:24,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416925797] [2019-11-23 22:29:24,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2531 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2019-11-23 22:29:34,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416925797] [2019-11-23 22:29:34,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45689949] [2019-11-23 22:29:34,172 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true