/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:11:02,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:11:02,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:11:02,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:11:02,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:11:02,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:11:02,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:11:02,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:11:02,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:11:02,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:11:02,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:11:02,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:11:02,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:11:02,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:11:02,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:11:02,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:11:02,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:11:02,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:11:02,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:11:02,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:11:02,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:11:02,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:11:02,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:11:02,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:11:02,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:11:02,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:11:02,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:11:02,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:11:02,590 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 [2019-11-06 22:11:02,608 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:11:02,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:11:02,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:11:02,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:11:02,611 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:11:02,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:11:02,611 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:11:02,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:11:02,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:11:02,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:11:02,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:11:02,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:11:02,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:11:02,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:11:02,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:11:02,614 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:11:02,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:11:02,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:11:02,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:11:02,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:11:02,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:11:02,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:11:02,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:11:02,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:11:02,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:11:02,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:11:02,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:11:02,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:11:02,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:11:02,920 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:11:02,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:11:02,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:11:02,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:11:02,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:11:02,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-11-06 22:11:03,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1ccc5d3/dd86e54894644ee7ae7a88973a1629e7/FLAG1afc477c0 [2019-11-06 22:11:03,507 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:11:03,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-11-06 22:11:03,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1ccc5d3/dd86e54894644ee7ae7a88973a1629e7/FLAG1afc477c0 [2019-11-06 22:11:03,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c1ccc5d3/dd86e54894644ee7ae7a88973a1629e7 [2019-11-06 22:11:03,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:11:03,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:11:03,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:03,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:11:03,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:11:03,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:03" (1/1) ... [2019-11-06 22:11:03,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3043c2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:03, skipping insertion in model container [2019-11-06 22:11:03,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:03" (1/1) ... [2019-11-06 22:11:03,954 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:11:03,972 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:11:04,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:04,200 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:11:04,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:11:04,239 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:11:04,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04 WrapperNode [2019-11-06 22:11:04,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:11:04,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:11:04,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:11:04,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:11:04,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (1/1) ... [2019-11-06 22:11:04,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (1/1) ... [2019-11-06 22:11:04,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (1/1) ... [2019-11-06 22:11:04,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (1/1) ... [2019-11-06 22:11:04,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (1/1) ... [2019-11-06 22:11:04,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (1/1) ... [2019-11-06 22:11:04,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (1/1) ... [2019-11-06 22:11:04,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:11:04,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:11:04,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:11:04,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:11:04,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (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 [2019-11-06 22:11:04,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:11:04,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:11:04,452 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-06 22:11:04,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:11:04,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:11:04,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:11:04,452 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-06 22:11:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:11:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:11:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:11:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:11:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:11:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:11:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:11:04,754 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:11:04,755 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:11:04,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:04 BoogieIcfgContainer [2019-11-06 22:11:04,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:11:04,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:11:04,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:11:04,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:11:04,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:11:03" (1/3) ... [2019-11-06 22:11:04,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c1caac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:04, skipping insertion in model container [2019-11-06 22:11:04,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:04" (2/3) ... [2019-11-06 22:11:04,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c1caac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:04, skipping insertion in model container [2019-11-06 22:11:04,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:04" (3/3) ... [2019-11-06 22:11:04,777 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-11-06 22:11:04,787 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:11:04,795 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:11:04,807 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:11:04,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:11:04,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:11:04,833 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:11:04,833 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:11:04,833 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:11:04,833 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:11:04,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:11:04,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:11:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-06 22:11:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:04,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:04,855 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:04,857 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-11-06 22:11:04,869 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:04,870 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294817439] [2019-11-06 22:11:04,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:05,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294817439] [2019-11-06 22:11:05,069 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:11:05,069 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:11:05,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990047912] [2019-11-06 22:11:05,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:05,075 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:11:05,093 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-11-06 22:11:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:05,251 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-11-06 22:11:05,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:05,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:05,265 INFO L225 Difference]: With dead ends: 56 [2019-11-06 22:11:05,266 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 22:11:05,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:11:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 22:11:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 22:11:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 22:11:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-06 22:11:05,338 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-11-06 22:11:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:05,340 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-06 22:11:05,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-06 22:11:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 22:11:05,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:05,347 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:05,348 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:05,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-11-06 22:11:05,349 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:05,350 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470123529] [2019-11-06 22:11:05,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:11:05,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470123529] [2019-11-06 22:11:05,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125373488] [2019-11-06 22:11:05,517 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 [2019-11-06 22:11:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:05,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:11:05,631 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:05,631 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 22:11:05,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373633209] [2019-11-06 22:11:05,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:05,635 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:05,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:05,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:05,636 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-11-06 22:11:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:05,657 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-06 22:11:05,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:05,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 22:11:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:05,659 INFO L225 Difference]: With dead ends: 48 [2019-11-06 22:11:05,659 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 22:11:05,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 22:11:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 22:11:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 22:11:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-06 22:11:05,680 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-11-06 22:11:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:05,682 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-06 22:11:05,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-06 22:11:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 22:11:05,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:05,683 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:05,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:05,888 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-11-06 22:11:05,889 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:05,890 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978608237] [2019-11-06 22:11:05,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:11:06,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978608237] [2019-11-06 22:11:06,031 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319805730] [2019-11-06 22:11:06,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:11:06,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:11:06,113 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:06,114 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 22:11:06,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313591190] [2019-11-06 22:11:06,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:11:06,115 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:11:06,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:06,116 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-11-06 22:11:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:06,140 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-11-06 22:11:06,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:11:06,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 22:11:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:06,143 INFO L225 Difference]: With dead ends: 49 [2019-11-06 22:11:06,143 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 22:11:06,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 22:11:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-06 22:11:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 22:11:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 22:11:06,161 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-11-06 22:11:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:06,161 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 22:11:06,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:11:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 22:11:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 22:11:06,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:06,166 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-06 22:11:06,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:06,370 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:06,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-11-06 22:11:06,371 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:06,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390069142] [2019-11-06 22:11:06,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:06,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390069142] [2019-11-06 22:11:06,538 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:11:06,539 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:11:06,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011625855] [2019-11-06 22:11:06,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:11:06,540 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:06,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:11:06,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:06,540 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-11-06 22:11:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:06,615 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-06 22:11:06,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:11:06,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-06 22:11:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:06,617 INFO L225 Difference]: With dead ends: 45 [2019-11-06 22:11:06,617 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 22:11:06,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:11:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 22:11:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-06 22:11:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 22:11:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-06 22:11:06,623 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-11-06 22:11:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:06,625 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-06 22:11:06,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:11:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-06 22:11:06,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 22:11:06,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:06,629 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-11-06 22:11:06,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:06,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-11-06 22:11:06,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:06,630 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187211842] [2019-11-06 22:11:06,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:06,774 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187211842] [2019-11-06 22:11:06,774 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302542420] [2019-11-06 22:11:06,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:11:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:06,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:06,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:06,875 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:06,876 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 22:11:06,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626737221] [2019-11-06 22:11:06,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:11:06,878 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:11:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:06,879 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-11-06 22:11:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:06,967 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-11-06 22:11:06,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:11:06,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-11-06 22:11:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:06,969 INFO L225 Difference]: With dead ends: 54 [2019-11-06 22:11:06,969 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 22:11:06,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:11:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 22:11:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-06 22:11:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 22:11:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-11-06 22:11:06,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-11-06 22:11:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:06,977 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-11-06 22:11:06,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:11:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-11-06 22:11:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:11:06,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:06,978 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:07,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:07,190 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-11-06 22:11:07,191 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:07,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886579076] [2019-11-06 22:11:07,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:07,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886579076] [2019-11-06 22:11:07,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332768348] [2019-11-06 22:11:07,318 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 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 [2019-11-06 22:11:07,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:07,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:07,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:07,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:07,417 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:07,418 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 22:11:07,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728975010] [2019-11-06 22:11:07,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:11:07,419 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:07,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:11:07,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:07,422 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-11-06 22:11:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:07,512 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-06 22:11:07,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:11:07,512 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-11-06 22:11:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:07,513 INFO L225 Difference]: With dead ends: 56 [2019-11-06 22:11:07,513 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 22:11:07,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 22:11:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-06 22:11:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 22:11:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-11-06 22:11:07,525 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-11-06 22:11:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:07,525 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-11-06 22:11:07,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:11:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-11-06 22:11:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 22:11:07,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:07,527 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-06 22:11:07,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:07,734 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-11-06 22:11:07,735 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:07,736 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721312788] [2019-11-06 22:11:07,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:11:07,837 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721312788] [2019-11-06 22:11:07,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060198622] [2019-11-06 22:11:07,838 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 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 [2019-11-06 22:11:07,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 22:11:07,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:07,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:07,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-06 22:11:07,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:07,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:11:07,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440089426] [2019-11-06 22:11:07,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:07,957 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:07,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:07,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:07,959 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-11-06 22:11:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:08,112 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-11-06 22:11:08,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:08,113 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-11-06 22:11:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:08,114 INFO L225 Difference]: With dead ends: 63 [2019-11-06 22:11:08,115 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 22:11:08,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 22:11:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-11-06 22:11:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 22:11:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-06 22:11:08,121 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-11-06 22:11:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:08,122 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-06 22:11:08,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-06 22:11:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 22:11:08,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:08,123 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:08,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:08,334 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-11-06 22:11:08,334 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:08,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833821215] [2019-11-06 22:11:08,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 22:11:08,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833821215] [2019-11-06 22:11:08,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493938967] [2019-11-06 22:11:08,439 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 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 [2019-11-06 22:11:08,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:08,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:08,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:08,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 22:11:08,566 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:08,566 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 22:11:08,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573068248] [2019-11-06 22:11:08,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:11:08,567 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:11:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:08,567 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2019-11-06 22:11:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:08,755 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2019-11-06 22:11:08,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:08,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2019-11-06 22:11:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:08,757 INFO L225 Difference]: With dead ends: 71 [2019-11-06 22:11:08,757 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 22:11:08,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:11:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 22:11:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-06 22:11:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 22:11:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-11-06 22:11:08,764 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 60 [2019-11-06 22:11:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:08,764 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-11-06 22:11:08,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:11:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-11-06 22:11:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 22:11:08,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:08,766 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:08,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:08,975 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash -535819369, now seen corresponding path program 5 times [2019-11-06 22:11:08,976 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:08,976 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101246608] [2019-11-06 22:11:08,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-06 22:11:09,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101246608] [2019-11-06 22:11:09,116 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426788860] [2019-11-06 22:11:09,116 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 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 [2019-11-06 22:11:09,246 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 22:11:09,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:09,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:09,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 22:11:09,356 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:09,357 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-06 22:11:09,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727606053] [2019-11-06 22:11:09,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:09,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:09,361 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 13 states. [2019-11-06 22:11:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:09,601 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-11-06 22:11:09,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:11:09,602 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-11-06 22:11:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:09,603 INFO L225 Difference]: With dead ends: 79 [2019-11-06 22:11:09,603 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 22:11:09,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 22:11:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-06 22:11:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 22:11:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-11-06 22:11:09,612 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 71 [2019-11-06 22:11:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:09,612 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-11-06 22:11:09,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-11-06 22:11:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 22:11:09,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:09,618 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:09,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:09,830 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash 778847808, now seen corresponding path program 6 times [2019-11-06 22:11:09,832 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:09,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277155593] [2019-11-06 22:11:09,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-11-06 22:11:10,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277155593] [2019-11-06 22:11:10,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702832613] [2019-11-06 22:11:10,034 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 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 [2019-11-06 22:11:10,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 22:11:10,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:10,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:11:10,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-06 22:11:10,145 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:10,145 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-11-06 22:11:10,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136867844] [2019-11-06 22:11:10,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:10,146 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:10,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:10,147 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 12 states. [2019-11-06 22:11:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:10,282 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2019-11-06 22:11:10,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:10,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-11-06 22:11:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:10,284 INFO L225 Difference]: With dead ends: 85 [2019-11-06 22:11:10,284 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 22:11:10,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 22:11:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-11-06 22:11:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 22:11:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-06 22:11:10,291 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 82 [2019-11-06 22:11:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:10,291 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-06 22:11:10,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-06 22:11:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 22:11:10,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:10,292 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:10,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:10,496 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash 27018272, now seen corresponding path program 7 times [2019-11-06 22:11:10,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:10,498 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780498166] [2019-11-06 22:11:10,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:10,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780498166] [2019-11-06 22:11:10,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040672788] [2019-11-06 22:11:10,658 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 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 [2019-11-06 22:11:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:10,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:10,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:10,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:10,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:11:10,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054654266] [2019-11-06 22:11:10,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:10,755 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:10,756 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2019-11-06 22:11:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:10,839 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-11-06 22:11:10,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:10,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-11-06 22:11:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:10,840 INFO L225 Difference]: With dead ends: 88 [2019-11-06 22:11:10,840 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 22:11:10,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 22:11:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-06 22:11:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 22:11:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-11-06 22:11:10,847 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 86 [2019-11-06 22:11:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:10,848 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-11-06 22:11:10,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-11-06 22:11:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:11:10,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:10,849 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:11,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:11,053 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:11,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1793036866, now seen corresponding path program 8 times [2019-11-06 22:11:11,054 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:11,054 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039439077] [2019-11-06 22:11:11,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:11,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039439077] [2019-11-06 22:11:11,193 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821577045] [2019-11-06 22:11:11,194 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 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 [2019-11-06 22:11:11,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:11,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:11,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:11,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:11,299 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:11,299 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:11:11,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501092528] [2019-11-06 22:11:11,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:11,300 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:11,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:11,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:11,301 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 13 states. [2019-11-06 22:11:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:11,404 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-11-06 22:11:11,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:11,404 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-11-06 22:11:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:11,405 INFO L225 Difference]: With dead ends: 90 [2019-11-06 22:11:11,405 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 22:11:11,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 22:11:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-06 22:11:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 22:11:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-11-06 22:11:11,412 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 88 [2019-11-06 22:11:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:11,412 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-11-06 22:11:11,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-11-06 22:11:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:11:11,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:11,414 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:11,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:11,619 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1870143516, now seen corresponding path program 9 times [2019-11-06 22:11:11,620 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:11,620 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415761777] [2019-11-06 22:11:11,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 22:11:11,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415761777] [2019-11-06 22:11:11,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485802459] [2019-11-06 22:11:11,792 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 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 [2019-11-06 22:11:11,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 22:11:11,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:11,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:11:11,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-11-06 22:11:11,927 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:11,927 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 22:11:11,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371044178] [2019-11-06 22:11:11,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:11:11,928 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:11:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:11:11,929 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 16 states. [2019-11-06 22:11:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:12,093 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2019-11-06 22:11:12,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:11:12,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-11-06 22:11:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:12,095 INFO L225 Difference]: With dead ends: 94 [2019-11-06 22:11:12,095 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 22:11:12,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:11:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 22:11:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-06 22:11:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 22:11:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-11-06 22:11:12,101 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 90 [2019-11-06 22:11:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:12,102 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-11-06 22:11:12,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:11:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-11-06 22:11:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:11:12,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:12,103 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 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, 1] [2019-11-06 22:11:12,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:12,307 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1573371196, now seen corresponding path program 10 times [2019-11-06 22:11:12,309 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:12,309 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601205496] [2019-11-06 22:11:12,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-06 22:11:12,451 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601205496] [2019-11-06 22:11:12,451 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019093209] [2019-11-06 22:11:12,451 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 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 [2019-11-06 22:11:12,519 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:12,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:12,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:12,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-11-06 22:11:12,533 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:12,534 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-11-06 22:11:12,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687073907] [2019-11-06 22:11:12,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:11:12,535 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:11:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:12,535 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 8 states. [2019-11-06 22:11:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:12,705 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-11-06 22:11:12,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:11:12,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2019-11-06 22:11:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:12,707 INFO L225 Difference]: With dead ends: 99 [2019-11-06 22:11:12,707 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 22:11:12,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 22:11:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-11-06 22:11:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 22:11:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-11-06 22:11:12,713 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 94 [2019-11-06 22:11:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:12,713 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-11-06 22:11:12,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:11:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-11-06 22:11:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 22:11:12,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:12,715 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 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, 1] [2019-11-06 22:11:12,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:12,919 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2058184687, now seen corresponding path program 11 times [2019-11-06 22:11:12,920 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:12,920 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264994900] [2019-11-06 22:11:12,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-11-06 22:11:13,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264994900] [2019-11-06 22:11:13,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796160736] [2019-11-06 22:11:13,162 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 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 [2019-11-06 22:11:13,571 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-06 22:11:13,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:13,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:13,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 174 proven. 35 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-06 22:11:13,595 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:13,595 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-11-06 22:11:13,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682392813] [2019-11-06 22:11:13,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:13,596 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:13,597 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 9 states. [2019-11-06 22:11:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:13,766 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2019-11-06 22:11:13,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:13,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2019-11-06 22:11:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:13,767 INFO L225 Difference]: With dead ends: 105 [2019-11-06 22:11:13,767 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 22:11:13,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 22:11:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-11-06 22:11:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 22:11:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2019-11-06 22:11:13,774 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 103 [2019-11-06 22:11:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:13,774 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2019-11-06 22:11:13,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2019-11-06 22:11:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 22:11:13,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:13,776 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 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, 1] [2019-11-06 22:11:13,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:13,988 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:13,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1611383708, now seen corresponding path program 12 times [2019-11-06 22:11:13,989 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:13,989 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886583192] [2019-11-06 22:11:13,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 124 proven. 175 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-06 22:11:14,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886583192] [2019-11-06 22:11:14,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730814470] [2019-11-06 22:11:14,173 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 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 [2019-11-06 22:11:14,279 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:11:14,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:14,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:11:14,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 250 proven. 9 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-06 22:11:14,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:14,328 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 22:11:14,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380610351] [2019-11-06 22:11:14,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 22:11:14,329 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:14,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 22:11:14,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:11:14,329 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 14 states. [2019-11-06 22:11:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:14,582 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2019-11-06 22:11:14,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:11:14,582 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2019-11-06 22:11:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:14,584 INFO L225 Difference]: With dead ends: 114 [2019-11-06 22:11:14,584 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 22:11:14,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:14,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 22:11:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-11-06 22:11:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 22:11:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2019-11-06 22:11:14,591 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 112 [2019-11-06 22:11:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:14,591 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2019-11-06 22:11:14,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 22:11:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2019-11-06 22:11:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 22:11:14,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:14,593 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:14,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:14,797 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2115527283, now seen corresponding path program 13 times [2019-11-06 22:11:14,798 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:14,798 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722346780] [2019-11-06 22:11:14,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 165 proven. 235 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-11-06 22:11:15,005 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722346780] [2019-11-06 22:11:15,005 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736158280] [2019-11-06 22:11:15,005 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 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 [2019-11-06 22:11:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:15,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 326 proven. 70 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2019-11-06 22:11:15,132 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:15,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2019-11-06 22:11:15,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517466418] [2019-11-06 22:11:15,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:11:15,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:11:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:15,134 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 11 states. [2019-11-06 22:11:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:15,335 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2019-11-06 22:11:15,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:15,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2019-11-06 22:11:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:15,337 INFO L225 Difference]: With dead ends: 121 [2019-11-06 22:11:15,337 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 22:11:15,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:11:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 22:11:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-11-06 22:11:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:11:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2019-11-06 22:11:15,344 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 123 [2019-11-06 22:11:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:15,344 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2019-11-06 22:11:15,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:11:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2019-11-06 22:11:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:11:15,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:15,346 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:15,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:15,559 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash -638066878, now seen corresponding path program 14 times [2019-11-06 22:11:15,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:15,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053482867] [2019-11-06 22:11:15,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2019-11-06 22:11:15,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053482867] [2019-11-06 22:11:15,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505937817] [2019-11-06 22:11:15,759 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 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 [2019-11-06 22:11:15,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:15,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:15,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:15,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-11-06 22:11:15,905 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:15,905 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-11-06 22:11:15,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960839654] [2019-11-06 22:11:15,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:15,906 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:15,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:15,907 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 12 states. [2019-11-06 22:11:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:16,148 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2019-11-06 22:11:16,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:16,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2019-11-06 22:11:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:16,149 INFO L225 Difference]: With dead ends: 127 [2019-11-06 22:11:16,149 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 22:11:16,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:11:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 22:11:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-11-06 22:11:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 22:11:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2019-11-06 22:11:16,155 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 132 [2019-11-06 22:11:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:16,155 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2019-11-06 22:11:16,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2019-11-06 22:11:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:11:16,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:16,157 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 27, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:16,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:16,357 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:16,358 INFO L82 PathProgramCache]: Analyzing trace with hash -720039853, now seen corresponding path program 15 times [2019-11-06 22:11:16,358 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:16,358 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620408894] [2019-11-06 22:11:16,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 265 proven. 382 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2019-11-06 22:11:16,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620408894] [2019-11-06 22:11:16,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933673174] [2019-11-06 22:11:16,551 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 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 [2019-11-06 22:11:16,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 22:11:16,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:16,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 22:11:16,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 532 proven. 16 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-11-06 22:11:16,782 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:16,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-11-06 22:11:16,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031680976] [2019-11-06 22:11:16,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 22:11:16,784 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 22:11:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:11:16,785 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 19 states. [2019-11-06 22:11:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:17,116 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2019-11-06 22:11:17,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:11:17,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2019-11-06 22:11:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:17,118 INFO L225 Difference]: With dead ends: 134 [2019-11-06 22:11:17,118 INFO L226 Difference]: Without dead ends: 84 [2019-11-06 22:11:17,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2019-11-06 22:11:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-06 22:11:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-11-06 22:11:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 22:11:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2019-11-06 22:11:17,124 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 141 [2019-11-06 22:11:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:17,124 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2019-11-06 22:11:17,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 22:11:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2019-11-06 22:11:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:11:17,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:17,127 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:17,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:17,338 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:17,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1444910496, now seen corresponding path program 16 times [2019-11-06 22:11:17,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:17,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506178320] [2019-11-06 22:11:17,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-11-06 22:11:17,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506178320] [2019-11-06 22:11:17,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068701430] [2019-11-06 22:11:17,527 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 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 [2019-11-06 22:11:17,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:17,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:17,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:17,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 650 proven. 25 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-11-06 22:11:17,696 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:17,696 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 22:11:17,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293511905] [2019-11-06 22:11:17,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:11:17,697 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:11:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:17,698 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 10 states. [2019-11-06 22:11:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:17,789 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2019-11-06 22:11:17,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:17,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 152 [2019-11-06 22:11:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:17,791 INFO L225 Difference]: With dead ends: 127 [2019-11-06 22:11:17,791 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 22:11:17,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 22:11:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-06 22:11:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-06 22:11:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2019-11-06 22:11:17,796 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 152 [2019-11-06 22:11:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:17,797 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2019-11-06 22:11:17,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:11:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2019-11-06 22:11:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:11:17,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:17,799 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:18,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:18,004 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:18,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1810174302, now seen corresponding path program 17 times [2019-11-06 22:11:18,005 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:18,005 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351987875] [2019-11-06 22:11:18,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-11-06 22:11:18,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351987875] [2019-11-06 22:11:18,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617569859] [2019-11-06 22:11:18,232 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 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 [2019-11-06 22:11:19,748 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-06 22:11:19,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:19,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:19,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-11-06 22:11:19,784 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:19,784 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 22:11:19,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51303868] [2019-11-06 22:11:19,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:11:19,785 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:19,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:11:19,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:19,786 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 11 states. [2019-11-06 22:11:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:19,868 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2019-11-06 22:11:19,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:11:19,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-11-06 22:11:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:19,869 INFO L225 Difference]: With dead ends: 129 [2019-11-06 22:11:19,869 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 22:11:19,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 22:11:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-11-06 22:11:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 22:11:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2019-11-06 22:11:19,875 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 154 [2019-11-06 22:11:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:19,875 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2019-11-06 22:11:19,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:11:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2019-11-06 22:11:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 22:11:19,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:19,877 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:20,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:20,084 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:20,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:20,085 INFO L82 PathProgramCache]: Analyzing trace with hash 641373596, now seen corresponding path program 18 times [2019-11-06 22:11:20,085 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:20,085 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377886691] [2019-11-06 22:11:20,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-11-06 22:11:20,298 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377886691] [2019-11-06 22:11:20,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787803505] [2019-11-06 22:11:20,299 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 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 [2019-11-06 22:11:20,682 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 22:11:20,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:20,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 22:11:20,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 650 proven. 49 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-11-06 22:11:20,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:20,727 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 22:11:20,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080867814] [2019-11-06 22:11:20,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:20,728 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:20,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:20,729 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 12 states. [2019-11-06 22:11:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:20,867 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2019-11-06 22:11:20,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:20,869 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 156 [2019-11-06 22:11:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:20,870 INFO L225 Difference]: With dead ends: 131 [2019-11-06 22:11:20,870 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 22:11:20,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 22:11:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 22:11:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 22:11:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2019-11-06 22:11:20,879 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 156 [2019-11-06 22:11:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:20,880 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2019-11-06 22:11:20,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2019-11-06 22:11:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:11:20,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:20,882 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:21,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:21,093 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:21,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1589640614, now seen corresponding path program 19 times [2019-11-06 22:11:21,094 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:21,094 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246269063] [2019-11-06 22:11:21,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-11-06 22:11:21,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246269063] [2019-11-06 22:11:21,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015949034] [2019-11-06 22:11:21,299 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 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 [2019-11-06 22:11:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:21,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:21,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 650 proven. 64 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-11-06 22:11:21,454 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:21,455 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 22:11:21,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184284545] [2019-11-06 22:11:21,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:21,456 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:21,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:21,456 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand 13 states. [2019-11-06 22:11:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:21,593 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2019-11-06 22:11:21,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:21,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 158 [2019-11-06 22:11:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:21,595 INFO L225 Difference]: With dead ends: 132 [2019-11-06 22:11:21,595 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 22:11:21,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 22:11:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-11-06 22:11:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 22:11:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2019-11-06 22:11:21,600 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 158 [2019-11-06 22:11:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:21,601 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2019-11-06 22:11:21,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2019-11-06 22:11:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:11:21,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:21,603 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:21,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:21,807 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:21,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1889351576, now seen corresponding path program 20 times [2019-11-06 22:11:21,808 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:21,808 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49617309] [2019-11-06 22:11:21,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2019-11-06 22:11:23,090 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49617309] [2019-11-06 22:11:23,090 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973366871] [2019-11-06 22:11:23,090 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 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 [2019-11-06 22:11:23,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:23,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:23,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-06 22:11:23,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:23,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:11:23,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:11:24,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:11:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-06 22:11:24,378 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:24,378 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 40] total 44 [2019-11-06 22:11:24,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525556305] [2019-11-06 22:11:24,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-06 22:11:24,381 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:24,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-06 22:11:24,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1778, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 22:11:24,382 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 44 states. [2019-11-06 22:11:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:27,419 INFO L93 Difference]: Finished difference Result 299 states and 417 transitions. [2019-11-06 22:11:27,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-06 22:11:27,420 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 160 [2019-11-06 22:11:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:27,426 INFO L225 Difference]: With dead ends: 299 [2019-11-06 22:11:27,426 INFO L226 Difference]: Without dead ends: 295 [2019-11-06 22:11:27,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 157 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=285, Invalid=5415, Unknown=0, NotChecked=0, Total=5700 [2019-11-06 22:11:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-11-06 22:11:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 233. [2019-11-06 22:11:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-06 22:11:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 299 transitions. [2019-11-06 22:11:27,474 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 299 transitions. Word has length 160 [2019-11-06 22:11:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:27,474 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 299 transitions. [2019-11-06 22:11:27,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-06 22:11:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 299 transitions. [2019-11-06 22:11:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:11:27,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:27,477 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:27,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:27,682 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1725557350, now seen corresponding path program 1 times [2019-11-06 22:11:27,682 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:27,682 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864575385] [2019-11-06 22:11:27,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 324 proven. 864 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-11-06 22:11:29,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864575385] [2019-11-06 22:11:29,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928172612] [2019-11-06 22:11:29,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:11:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:29,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-06 22:11:29,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:29,282 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 22:11:29,288 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2019-11-06 22:11:29,289 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 22:11:29,298 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 22:11:29,299 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 22:11:29,299 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2019-11-06 22:11:29,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:11:29,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:11:29,498 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-06 22:11:29,499 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 22:11:29,503 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 22:11:29,504 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 22:11:29,504 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:11 [2019-11-06 22:11:29,511 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-06 22:11:29,512 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 22:11:29,519 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 22:11:29,519 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 22:11:29,519 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2019-11-06 22:11:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2019-11-06 22:11:30,714 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:11:30,714 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 39 [2019-11-06 22:11:30,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270474089] [2019-11-06 22:11:30,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-06 22:11:30,716 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-06 22:11:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 22:11:30,717 INFO L87 Difference]: Start difference. First operand 233 states and 299 transitions. Second operand 39 states. [2019-11-06 22:11:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:39,098 INFO L93 Difference]: Finished difference Result 1266 states and 1759 transitions. [2019-11-06 22:11:39,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2019-11-06 22:11:39,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 160 [2019-11-06 22:11:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:39,111 INFO L225 Difference]: With dead ends: 1266 [2019-11-06 22:11:39,111 INFO L226 Difference]: Without dead ends: 956 [2019-11-06 22:11:39,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10758 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1693, Invalid=26699, Unknown=0, NotChecked=0, Total=28392 [2019-11-06 22:11:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2019-11-06 22:11:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 601. [2019-11-06 22:11:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2019-11-06 22:11:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 806 transitions. [2019-11-06 22:11:39,174 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 806 transitions. Word has length 160 [2019-11-06 22:11:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:39,174 INFO L462 AbstractCegarLoop]: Abstraction has 601 states and 806 transitions. [2019-11-06 22:11:39,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-06 22:11:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 806 transitions. [2019-11-06 22:11:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:11:39,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:39,179 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:39,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:39,384 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2147450282, now seen corresponding path program 2 times [2019-11-06 22:11:39,385 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:39,385 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530142780] [2019-11-06 22:11:39,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY