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/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:46:25,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:46:25,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:46:25,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:46:25,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:46:25,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:46:25,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:46:25,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:46:25,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:46:25,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:46:25,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:46:25,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:46:25,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:46:25,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:46:25,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:46:25,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:46:25,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:46:25,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:46:25,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:46:25,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:46:25,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:46:25,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:46:25,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:46:25,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:46:25,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:46:25,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:46:25,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:46:25,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:46:25,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:46:25,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:46:25,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:46:25,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:46:25,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:46:25,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:46:25,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:46:25,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:46:25,646 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 [2019-10-13 19:46:25,672 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:46:25,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:46:25,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:46:25,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:46:25,674 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:46:25,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:46:25,675 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:46:25,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:46:25,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:46:25,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:46:25,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:46:25,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:46:25,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:46:25,676 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:46:25,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:46:25,676 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:46:25,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:46:25,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:46:25,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:46:25,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:46:25,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:46:25,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:46:25,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:46:25,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:46:25,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:46:25,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:46:25,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:46:25,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:46:25,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:46:25,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:46:25,973 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:46:25,976 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:46:25,978 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:46:25,978 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:46:25,979 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-13 19:46:26,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c062e417c/0c611ead1dea4b0189d1f9c5a8eba8b5/FLAGf839f250e [2019-10-13 19:46:26,580 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:46:26,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-13 19:46:26,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c062e417c/0c611ead1dea4b0189d1f9c5a8eba8b5/FLAGf839f250e [2019-10-13 19:46:26,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c062e417c/0c611ead1dea4b0189d1f9c5a8eba8b5 [2019-10-13 19:46:26,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:46:26,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:46:26,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:46:26,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:46:26,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:46:26,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:46:26" (1/1) ... [2019-10-13 19:46:26,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7201edc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:26, skipping insertion in model container [2019-10-13 19:46:26,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:46:26" (1/1) ... [2019-10-13 19:46:26,933 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:46:27,003 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:46:27,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:46:27,582 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:46:27,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:46:28,011 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:46:28,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28 WrapperNode [2019-10-13 19:46:28,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:46:28,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:46:28,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:46:28,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:46:28,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (1/1) ... [2019-10-13 19:46:28,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (1/1) ... [2019-10-13 19:46:28,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (1/1) ... [2019-10-13 19:46:28,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (1/1) ... [2019-10-13 19:46:28,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (1/1) ... [2019-10-13 19:46:28,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (1/1) ... [2019-10-13 19:46:28,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (1/1) ... [2019-10-13 19:46:28,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:46:28,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:46:28,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:46:28,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:46:28,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (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 [2019-10-13 19:46:28,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:46:28,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:46:28,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:46:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:46:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 19:46:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-13 19:46:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-13 19:46:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:46:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-13 19:46:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-13 19:46:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-13 19:46:28,259 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-13 19:46:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-13 19:46:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-13 19:46:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-13 19:46:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:46:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:46:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:46:29,932 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:46:29,932 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:46:29,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:46:29 BoogieIcfgContainer [2019-10-13 19:46:29,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:46:29,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:46:29,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:46:29,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:46:29,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:46:26" (1/3) ... [2019-10-13 19:46:29,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38585a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:46:29, skipping insertion in model container [2019-10-13 19:46:29,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:28" (2/3) ... [2019-10-13 19:46:29,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38585a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:46:29, skipping insertion in model container [2019-10-13 19:46:29,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:46:29" (3/3) ... [2019-10-13 19:46:29,957 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2019-10-13 19:46:29,972 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:46:29,995 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:46:30,007 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:46:30,054 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:46:30,054 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:46:30,054 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:46:30,054 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:46:30,055 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:46:30,055 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:46:30,055 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:46:30,055 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:46:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states. [2019-10-13 19:46:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 19:46:30,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:30,125 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:30,127 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash 415390772, now seen corresponding path program 1 times [2019-10-13 19:46:30,142 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:30,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420555912] [2019-10-13 19:46:30,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:30,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:30,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:31,240 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:31,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420555912] [2019-10-13 19:46:31,308 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:31,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:31,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675572626] [2019-10-13 19:46:31,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:31,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:31,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:31,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:31,332 INFO L87 Difference]: Start difference. First operand 329 states. Second operand 4 states. [2019-10-13 19:46:31,685 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-13 19:46:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:33,364 INFO L93 Difference]: Finished difference Result 629 states and 1092 transitions. [2019-10-13 19:46:33,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:33,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 19:46:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:33,390 INFO L225 Difference]: With dead ends: 629 [2019-10-13 19:46:33,390 INFO L226 Difference]: Without dead ends: 514 [2019-10-13 19:46:33,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2019-10-13 19:46:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2019-10-13 19:46:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2019-10-13 19:46:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 761 transitions. [2019-10-13 19:46:33,521 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 761 transitions. Word has length 154 [2019-10-13 19:46:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:33,523 INFO L462 AbstractCegarLoop]: Abstraction has 512 states and 761 transitions. [2019-10-13 19:46:33,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 761 transitions. [2019-10-13 19:46:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 19:46:33,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:33,537 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:33,537 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1479062648, now seen corresponding path program 1 times [2019-10-13 19:46:33,538 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:33,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635888869] [2019-10-13 19:46:33,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:33,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:33,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:34,225 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:34,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635888869] [2019-10-13 19:46:34,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:34,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:34,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569220471] [2019-10-13 19:46:34,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:34,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:34,279 INFO L87 Difference]: Start difference. First operand 512 states and 761 transitions. Second operand 5 states. [2019-10-13 19:46:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:36,400 INFO L93 Difference]: Finished difference Result 1493 states and 2216 transitions. [2019-10-13 19:46:36,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:36,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-13 19:46:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:36,407 INFO L225 Difference]: With dead ends: 1493 [2019-10-13 19:46:36,408 INFO L226 Difference]: Without dead ends: 994 [2019-10-13 19:46:36,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2019-10-13 19:46:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 992. [2019-10-13 19:46:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2019-10-13 19:46:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1463 transitions. [2019-10-13 19:46:36,466 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1463 transitions. Word has length 154 [2019-10-13 19:46:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:36,467 INFO L462 AbstractCegarLoop]: Abstraction has 992 states and 1463 transitions. [2019-10-13 19:46:36,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1463 transitions. [2019-10-13 19:46:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 19:46:36,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:36,471 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:36,471 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash 203763094, now seen corresponding path program 1 times [2019-10-13 19:46:36,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:36,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983511556] [2019-10-13 19:46:36,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:36,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:36,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:36,773 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:36,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983511556] [2019-10-13 19:46:36,829 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:36,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:36,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688929048] [2019-10-13 19:46:36,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:36,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:36,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:36,832 INFO L87 Difference]: Start difference. First operand 992 states and 1463 transitions. Second operand 4 states. [2019-10-13 19:46:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:39,271 INFO L93 Difference]: Finished difference Result 2930 states and 4319 transitions. [2019-10-13 19:46:39,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:39,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-13 19:46:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:39,283 INFO L225 Difference]: With dead ends: 2930 [2019-10-13 19:46:39,283 INFO L226 Difference]: Without dead ends: 1970 [2019-10-13 19:46:39,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2019-10-13 19:46:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 994. [2019-10-13 19:46:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2019-10-13 19:46:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1465 transitions. [2019-10-13 19:46:39,353 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1465 transitions. Word has length 155 [2019-10-13 19:46:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:39,354 INFO L462 AbstractCegarLoop]: Abstraction has 994 states and 1465 transitions. [2019-10-13 19:46:39,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1465 transitions. [2019-10-13 19:46:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 19:46:39,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:39,358 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:39,359 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:39,359 INFO L82 PathProgramCache]: Analyzing trace with hash -691639607, now seen corresponding path program 1 times [2019-10-13 19:46:39,360 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:39,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705400167] [2019-10-13 19:46:39,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:39,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:39,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:39,800 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:39,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705400167] [2019-10-13 19:46:39,841 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:39,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:39,841 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327952110] [2019-10-13 19:46:39,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:39,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:39,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:39,843 INFO L87 Difference]: Start difference. First operand 994 states and 1465 transitions. Second operand 5 states. [2019-10-13 19:46:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:41,129 INFO L93 Difference]: Finished difference Result 1970 states and 2905 transitions. [2019-10-13 19:46:41,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:41,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-13 19:46:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:41,135 INFO L225 Difference]: With dead ends: 1970 [2019-10-13 19:46:41,135 INFO L226 Difference]: Without dead ends: 994 [2019-10-13 19:46:41,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2019-10-13 19:46:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 993. [2019-10-13 19:46:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2019-10-13 19:46:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1462 transitions. [2019-10-13 19:46:41,181 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1462 transitions. Word has length 156 [2019-10-13 19:46:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:41,182 INFO L462 AbstractCegarLoop]: Abstraction has 993 states and 1462 transitions. [2019-10-13 19:46:41,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1462 transitions. [2019-10-13 19:46:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 19:46:41,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:41,186 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:41,186 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2145460590, now seen corresponding path program 1 times [2019-10-13 19:46:41,187 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:41,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145031926] [2019-10-13 19:46:41,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:41,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:41,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:41,609 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:41,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145031926] [2019-10-13 19:46:41,656 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:41,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:41,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678193907] [2019-10-13 19:46:41,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:41,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:41,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:41,658 INFO L87 Difference]: Start difference. First operand 993 states and 1462 transitions. Second operand 5 states. [2019-10-13 19:46:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:43,324 INFO L93 Difference]: Finished difference Result 1973 states and 2907 transitions. [2019-10-13 19:46:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:43,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-13 19:46:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:43,332 INFO L225 Difference]: With dead ends: 1973 [2019-10-13 19:46:43,333 INFO L226 Difference]: Without dead ends: 991 [2019-10-13 19:46:43,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-10-13 19:46:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2019-10-13 19:46:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-10-13 19:46:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1458 transitions. [2019-10-13 19:46:43,399 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1458 transitions. Word has length 156 [2019-10-13 19:46:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:43,399 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1458 transitions. [2019-10-13 19:46:43,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1458 transitions. [2019-10-13 19:46:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 19:46:43,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:43,405 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:43,405 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:43,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1752535471, now seen corresponding path program 1 times [2019-10-13 19:46:43,406 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:43,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106040630] [2019-10-13 19:46:43,407 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:43,407 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:43,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:43,823 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:43,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106040630] [2019-10-13 19:46:43,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:43,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:43,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348369267] [2019-10-13 19:46:43,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:43,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:43,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:43,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:43,923 INFO L87 Difference]: Start difference. First operand 991 states and 1458 transitions. Second operand 4 states. [2019-10-13 19:46:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:46,302 INFO L93 Difference]: Finished difference Result 2257 states and 3335 transitions. [2019-10-13 19:46:46,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:46,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-13 19:46:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:46,313 INFO L225 Difference]: With dead ends: 2257 [2019-10-13 19:46:46,313 INFO L226 Difference]: Without dead ends: 1462 [2019-10-13 19:46:46,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2019-10-13 19:46:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1460. [2019-10-13 19:46:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1460 states. [2019-10-13 19:46:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2122 transitions. [2019-10-13 19:46:46,401 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2122 transitions. Word has length 156 [2019-10-13 19:46:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:46,403 INFO L462 AbstractCegarLoop]: Abstraction has 1460 states and 2122 transitions. [2019-10-13 19:46:46,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2122 transitions. [2019-10-13 19:46:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 19:46:46,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:46,407 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:46,407 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1902063682, now seen corresponding path program 1 times [2019-10-13 19:46:46,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:46,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818168914] [2019-10-13 19:46:46,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:46,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:46,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:46,699 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:46,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818168914] [2019-10-13 19:46:46,744 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:46,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:46,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340770624] [2019-10-13 19:46:46,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:46,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:46,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:46,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:46,747 INFO L87 Difference]: Start difference. First operand 1460 states and 2122 transitions. Second operand 4 states. [2019-10-13 19:46:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:48,293 INFO L93 Difference]: Finished difference Result 3179 states and 4753 transitions. [2019-10-13 19:46:48,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:48,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-13 19:46:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:48,309 INFO L225 Difference]: With dead ends: 3179 [2019-10-13 19:46:48,309 INFO L226 Difference]: Without dead ends: 1908 [2019-10-13 19:46:48,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2019-10-13 19:46:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1876. [2019-10-13 19:46:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2019-10-13 19:46:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2798 transitions. [2019-10-13 19:46:48,393 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2798 transitions. Word has length 157 [2019-10-13 19:46:48,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:48,393 INFO L462 AbstractCegarLoop]: Abstraction has 1876 states and 2798 transitions. [2019-10-13 19:46:48,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2798 transitions. [2019-10-13 19:46:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 19:46:48,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:48,398 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:48,398 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:48,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:48,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1819575298, now seen corresponding path program 1 times [2019-10-13 19:46:48,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:48,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770456557] [2019-10-13 19:46:48,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:48,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:48,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:48,833 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:48,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770456557] [2019-10-13 19:46:48,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:48,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:48,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135218569] [2019-10-13 19:46:48,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:48,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:48,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:48,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:48,890 INFO L87 Difference]: Start difference. First operand 1876 states and 2798 transitions. Second operand 5 states. [2019-10-13 19:46:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:51,134 INFO L93 Difference]: Finished difference Result 4810 states and 7177 transitions. [2019-10-13 19:46:51,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:51,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-13 19:46:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:51,153 INFO L225 Difference]: With dead ends: 4810 [2019-10-13 19:46:51,154 INFO L226 Difference]: Without dead ends: 2965 [2019-10-13 19:46:51,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2019-10-13 19:46:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2019-10-13 19:46:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2019-10-13 19:46:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4385 transitions. [2019-10-13 19:46:51,284 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4385 transitions. Word has length 160 [2019-10-13 19:46:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:51,285 INFO L462 AbstractCegarLoop]: Abstraction has 2963 states and 4385 transitions. [2019-10-13 19:46:51,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4385 transitions. [2019-10-13 19:46:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 19:46:51,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:51,290 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:51,290 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -489223043, now seen corresponding path program 1 times [2019-10-13 19:46:51,290 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:51,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944858500] [2019-10-13 19:46:51,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:51,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:51,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:51,642 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:51,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944858500] [2019-10-13 19:46:51,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:51,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:51,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564868777] [2019-10-13 19:46:51,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:51,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:51,722 INFO L87 Difference]: Start difference. First operand 2963 states and 4385 transitions. Second operand 4 states. [2019-10-13 19:46:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:53,866 INFO L93 Difference]: Finished difference Result 7148 states and 10640 transitions. [2019-10-13 19:46:53,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:53,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 19:46:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:53,888 INFO L225 Difference]: With dead ends: 7148 [2019-10-13 19:46:53,888 INFO L226 Difference]: Without dead ends: 4544 [2019-10-13 19:46:53,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4544 states. [2019-10-13 19:46:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4544 to 4542. [2019-10-13 19:46:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2019-10-13 19:46:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 6645 transitions. [2019-10-13 19:46:54,085 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 6645 transitions. Word has length 162 [2019-10-13 19:46:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:54,086 INFO L462 AbstractCegarLoop]: Abstraction has 4542 states and 6645 transitions. [2019-10-13 19:46:54,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 6645 transitions. [2019-10-13 19:46:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 19:46:54,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:54,092 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:54,092 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash -598358062, now seen corresponding path program 1 times [2019-10-13 19:46:54,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:54,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090042841] [2019-10-13 19:46:54,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:54,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:54,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:54,347 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:54,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090042841] [2019-10-13 19:46:54,429 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:54,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:54,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343338934] [2019-10-13 19:46:54,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:54,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:54,430 INFO L87 Difference]: Start difference. First operand 4542 states and 6645 transitions. Second operand 4 states. [2019-10-13 19:46:54,670 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-10-13 19:46:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:56,282 INFO L93 Difference]: Finished difference Result 12098 states and 17966 transitions. [2019-10-13 19:46:56,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:56,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 19:46:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:56,316 INFO L225 Difference]: With dead ends: 12098 [2019-10-13 19:46:56,316 INFO L226 Difference]: Without dead ends: 8790 [2019-10-13 19:46:56,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8790 states. [2019-10-13 19:46:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8790 to 8788. [2019-10-13 19:46:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8788 states. [2019-10-13 19:46:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 12891 transitions. [2019-10-13 19:46:56,716 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 12891 transitions. Word has length 166 [2019-10-13 19:46:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:56,718 INFO L462 AbstractCegarLoop]: Abstraction has 8788 states and 12891 transitions. [2019-10-13 19:46:56,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 12891 transitions. [2019-10-13 19:46:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 19:46:56,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:56,729 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:56,729 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash 875092589, now seen corresponding path program 1 times [2019-10-13 19:46:56,730 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:56,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129768975] [2019-10-13 19:46:56,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:56,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:56,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:57,174 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:46:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:57,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129768975] [2019-10-13 19:46:57,245 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:57,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:46:57,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893261641] [2019-10-13 19:46:57,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:46:57,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:46:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:46:57,247 INFO L87 Difference]: Start difference. First operand 8788 states and 12891 transitions. Second operand 9 states. [2019-10-13 19:46:57,526 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-10-13 19:47:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:47:00,091 INFO L93 Difference]: Finished difference Result 29662 states and 44875 transitions. [2019-10-13 19:47:00,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:47:00,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 166 [2019-10-13 19:47:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:47:00,143 INFO L225 Difference]: With dead ends: 29662 [2019-10-13 19:47:00,143 INFO L226 Difference]: Without dead ends: 21434 [2019-10-13 19:47:00,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:47:00,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21434 states. [2019-10-13 19:47:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21434 to 12552. [2019-10-13 19:47:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12552 states. [2019-10-13 19:47:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12552 states to 12552 states and 18471 transitions. [2019-10-13 19:47:00,927 INFO L78 Accepts]: Start accepts. Automaton has 12552 states and 18471 transitions. Word has length 166 [2019-10-13 19:47:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:47:00,927 INFO L462 AbstractCegarLoop]: Abstraction has 12552 states and 18471 transitions. [2019-10-13 19:47:00,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:47:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 12552 states and 18471 transitions. [2019-10-13 19:47:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 19:47:00,937 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:47:00,937 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:47:00,937 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:47:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:47:00,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2101346563, now seen corresponding path program 1 times [2019-10-13 19:47:00,938 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:47:00,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560066206] [2019-10-13 19:47:00,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:47:00,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:47:00,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:47:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:47:01,339 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-10-13 19:47:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:47:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:47:01,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560066206] [2019-10-13 19:47:01,391 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:47:01,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:47:01,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059044455] [2019-10-13 19:47:01,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:47:01,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:47:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:47:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:47:01,392 INFO L87 Difference]: Start difference. First operand 12552 states and 18471 transitions. Second operand 5 states.