/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:13:05,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:13:05,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:13:05,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:13:05,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:13:05,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:13:05,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:13:05,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:13:05,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:13:05,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:13:05,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:13:05,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:13:05,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:13:05,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:13:05,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:13:05,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:13:05,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:13:05,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:13:05,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:13:05,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:13:05,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:13:05,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:13:05,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:13:05,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:13:05,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:13:05,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:13:05,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:13:05,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:13:05,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:13:05,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:13:05,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:13:05,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:13:05,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:13:05,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:13:05,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:13:05,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:13:05,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:13:05,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:13:05,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:13:05,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:13:05,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:13:05,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 16:13:05,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:13:05,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:13:05,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:13:05,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:13:05,691 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:13:05,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:13:05,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:13:05,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:13:05,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:13:05,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:13:05,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:13:05,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:13:05,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:13:05,694 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:13:05,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:13:05,695 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:13:05,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:13:05,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:13:05,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:13:05,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:13:05,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:13:05,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:13:05,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:13:05,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:13:05,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:13:05,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:13:05,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:13:05,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:13:05,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:13:05,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:13:06,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:13:06,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:13:06,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:13:06,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:13:06,156 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:13:06,158 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 16:13:06,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/227655269/102e99f0f1524985a5b1ecf351b94916/FLAG204737da6 [2020-09-24 16:13:06,867 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:13:06,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 16:13:06,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/227655269/102e99f0f1524985a5b1ecf351b94916/FLAG204737da6 [2020-09-24 16:13:07,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/227655269/102e99f0f1524985a5b1ecf351b94916 [2020-09-24 16:13:07,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:13:07,116 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:13:07,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:13:07,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:13:07,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:13:07,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:07,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b134fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07, skipping insertion in model container [2020-09-24 16:13:07,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:07,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:13:07,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:13:07,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:13:07,683 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:13:07,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:13:07,966 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:13:07,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07 WrapperNode [2020-09-24 16:13:07,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:13:07,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:13:07,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:13:07,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:13:07,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:07,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:08,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:08,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:08,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:08,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:08,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... [2020-09-24 16:13:08,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:13:08,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:13:08,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:13:08,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:13:08,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 16:13:08,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:13:08,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:13:08,183 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 16:13:08,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:13:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:13:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 16:13:08,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 16:13:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 16:13:08,184 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 16:13:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 16:13:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 16:13:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 16:13:08,185 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 16:13:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 16:13:08,186 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 16:13:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 16:13:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 16:13:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 16:13:08,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:13:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:13:08,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:13:09,727 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:13:09,727 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 16:13:09,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:13:09 BoogieIcfgContainer [2020-09-24 16:13:09,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:13:09,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:13:09,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:13:09,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:13:09,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:13:07" (1/3) ... [2020-09-24 16:13:09,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48259602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:13:09, skipping insertion in model container [2020-09-24 16:13:09,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:13:07" (2/3) ... [2020-09-24 16:13:09,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48259602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:13:09, skipping insertion in model container [2020-09-24 16:13:09,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:13:09" (3/3) ... [2020-09-24 16:13:09,757 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 16:13:09,768 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:13:09,781 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:13:09,804 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:13:09,838 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:13:09,838 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:13:09,838 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:13:09,839 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:13:09,839 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:13:09,839 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:13:09,839 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:13:09,839 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:13:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 16:13:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-24 16:13:09,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:09,916 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:09,917 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-24 16:13:09,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:09,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658429422] [2020-09-24 16:13:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:10,506 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:10,506 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:10,506 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:10,507 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:10,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-24 16:13:10,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:10,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 16:13:10,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:10,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:10,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-24 16:13:10,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 16:13:10,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:11,100 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:11,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:11,112 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:11,113 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:11,113 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:11,113 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:11,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:11,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:11,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:11,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:11,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:11,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:11,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658429422] [2020-09-24 16:13:11,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:11,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:11,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748851635] [2020-09-24 16:13:11,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:11,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:11,445 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-24 16:13:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:16,345 INFO L93 Difference]: Finished difference Result 2066 states and 2749 transitions. [2020-09-24 16:13:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:13:16,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-24 16:13:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:16,390 INFO L225 Difference]: With dead ends: 2066 [2020-09-24 16:13:16,390 INFO L226 Difference]: Without dead ends: 1236 [2020-09-24 16:13:16,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:13:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-09-24 16:13:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1234. [2020-09-24 16:13:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-09-24 16:13:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1502 transitions. [2020-09-24 16:13:16,551 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1502 transitions. Word has length 407 [2020-09-24 16:13:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:16,554 INFO L479 AbstractCegarLoop]: Abstraction has 1234 states and 1502 transitions. [2020-09-24 16:13:16,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1502 transitions. [2020-09-24 16:13:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-24 16:13:16,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:16,565 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:16,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:13:16,565 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1024696889, now seen corresponding path program 1 times [2020-09-24 16:13:16,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:16,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538566828] [2020-09-24 16:13:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:16,694 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:16,694 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:16,694 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:16,695 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:16,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-24 16:13:16,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:16,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:13:16,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-24 16:13:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:13:16,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:13:17,025 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:17,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:17,036 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:17,036 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:17,036 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:17,036 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:17,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:17,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:17,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:17,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538566828] [2020-09-24 16:13:17,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:17,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:17,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264220507] [2020-09-24 16:13:17,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:17,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:17,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:17,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:17,217 INFO L87 Difference]: Start difference. First operand 1234 states and 1502 transitions. Second operand 4 states. [2020-09-24 16:13:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:21,495 INFO L93 Difference]: Finished difference Result 3323 states and 4103 transitions. [2020-09-24 16:13:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:13:21,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 408 [2020-09-24 16:13:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:21,508 INFO L225 Difference]: With dead ends: 3323 [2020-09-24 16:13:21,508 INFO L226 Difference]: Without dead ends: 2294 [2020-09-24 16:13:21,511 INFO L675 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 [2020-09-24 16:13:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2020-09-24 16:13:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1236. [2020-09-24 16:13:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2020-09-24 16:13:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1504 transitions. [2020-09-24 16:13:21,572 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1504 transitions. Word has length 408 [2020-09-24 16:13:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:21,573 INFO L479 AbstractCegarLoop]: Abstraction has 1236 states and 1504 transitions. [2020-09-24 16:13:21,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:13:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1504 transitions. [2020-09-24 16:13:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 16:13:21,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:21,582 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:21,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:13:21,582 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2025918869, now seen corresponding path program 1 times [2020-09-24 16:13:21,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:21,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061523255] [2020-09-24 16:13:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:21,695 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:21,695 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:21,695 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:21,695 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:21,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 16:13:21,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:21,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:13:21,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-09-24 16:13:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 16:13:21,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:13:22,191 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:22,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:22,208 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:22,215 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:22,215 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:22,216 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:22,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:22,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 16:13:22,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:22,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061523255] [2020-09-24 16:13:22,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:22,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:22,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967477105] [2020-09-24 16:13:22,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:22,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:22,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:22,516 INFO L87 Difference]: Start difference. First operand 1236 states and 1504 transitions. Second operand 4 states. [2020-09-24 16:13:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:26,424 INFO L93 Difference]: Finished difference Result 3066 states and 3785 transitions. [2020-09-24 16:13:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:13:26,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 409 [2020-09-24 16:13:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:26,437 INFO L225 Difference]: With dead ends: 3066 [2020-09-24 16:13:26,437 INFO L226 Difference]: Without dead ends: 2242 [2020-09-24 16:13:26,440 INFO L675 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 [2020-09-24 16:13:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-09-24 16:13:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2240. [2020-09-24 16:13:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2240 states. [2020-09-24 16:13:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2743 transitions. [2020-09-24 16:13:26,536 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2743 transitions. Word has length 409 [2020-09-24 16:13:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:26,537 INFO L479 AbstractCegarLoop]: Abstraction has 2240 states and 2743 transitions. [2020-09-24 16:13:26,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:13:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2743 transitions. [2020-09-24 16:13:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 16:13:26,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:26,567 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:26,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:13:26,567 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash 611806955, now seen corresponding path program 1 times [2020-09-24 16:13:26,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:26,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452309225] [2020-09-24 16:13:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:26,726 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:26,726 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:26,726 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:26,726 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:26,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 16:13:26,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:26,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 16:13:26,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-24 16:13:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 16:13:26,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:27,078 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:27,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:27,088 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:27,088 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:27,089 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:27,089 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:27,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:27,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:27,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:27,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:27,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:27,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452309225] [2020-09-24 16:13:27,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:27,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:27,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245691023] [2020-09-24 16:13:27,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:27,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:27,301 INFO L87 Difference]: Start difference. First operand 2240 states and 2743 transitions. Second operand 5 states. [2020-09-24 16:13:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:31,050 INFO L93 Difference]: Finished difference Result 5988 states and 7386 transitions. [2020-09-24 16:13:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:13:31,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 16:13:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:31,069 INFO L225 Difference]: With dead ends: 5988 [2020-09-24 16:13:31,069 INFO L226 Difference]: Without dead ends: 3924 [2020-09-24 16:13:31,075 INFO L675 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 [2020-09-24 16:13:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3924 states. [2020-09-24 16:13:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3924 to 3922. [2020-09-24 16:13:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3922 states. [2020-09-24 16:13:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 4795 transitions. [2020-09-24 16:13:31,223 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 4795 transitions. Word has length 409 [2020-09-24 16:13:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:31,225 INFO L479 AbstractCegarLoop]: Abstraction has 3922 states and 4795 transitions. [2020-09-24 16:13:31,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 4795 transitions. [2020-09-24 16:13:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 16:13:31,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:31,242 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:31,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:13:31,243 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-24 16:13:31,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:31,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583092938] [2020-09-24 16:13:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:31,416 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:31,416 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:31,416 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:31,416 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:31,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 16:13:31,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:31,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 16:13:31,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-09-24 16:13:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 16:13:31,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:31,751 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:31,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:31,758 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:31,758 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:31,758 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:31,759 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:31,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:31,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:31,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:31,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:31,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:31,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:31,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583092938] [2020-09-24 16:13:31,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:31,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:31,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732292807] [2020-09-24 16:13:31,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:31,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:31,921 INFO L87 Difference]: Start difference. First operand 3922 states and 4795 transitions. Second operand 5 states. [2020-09-24 16:13:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:35,842 INFO L93 Difference]: Finished difference Result 11041 states and 13536 transitions. [2020-09-24 16:13:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:13:35,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 16:13:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:35,873 INFO L225 Difference]: With dead ends: 11041 [2020-09-24 16:13:35,873 INFO L226 Difference]: Without dead ends: 7370 [2020-09-24 16:13:35,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:13:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2020-09-24 16:13:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 7368. [2020-09-24 16:13:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7368 states. [2020-09-24 16:13:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7368 states to 7368 states and 8968 transitions. [2020-09-24 16:13:36,105 INFO L78 Accepts]: Start accepts. Automaton has 7368 states and 8968 transitions. Word has length 409 [2020-09-24 16:13:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:36,106 INFO L479 AbstractCegarLoop]: Abstraction has 7368 states and 8968 transitions. [2020-09-24 16:13:36,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7368 states and 8968 transitions. [2020-09-24 16:13:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-24 16:13:36,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:36,121 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:36,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:13:36,122 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1907351519, now seen corresponding path program 1 times [2020-09-24 16:13:36,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:36,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354810260] [2020-09-24 16:13:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:36,212 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:36,213 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:36,213 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:36,219 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:36,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-24 16:13:36,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:36,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 16:13:36,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-24 16:13:36,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:13:36,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:36,543 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:36,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:36,552 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:36,553 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:36,553 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:36,553 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:36,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:36,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:36,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:36,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:36,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:36,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:36,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:36,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:36,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354810260] [2020-09-24 16:13:36,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:36,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:36,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754399303] [2020-09-24 16:13:36,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:36,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:36,716 INFO L87 Difference]: Start difference. First operand 7368 states and 8968 transitions. Second operand 4 states. [2020-09-24 16:13:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:40,831 INFO L93 Difference]: Finished difference Result 21537 states and 26256 transitions. [2020-09-24 16:13:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:13:40,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2020-09-24 16:13:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:40,877 INFO L225 Difference]: With dead ends: 21537 [2020-09-24 16:13:40,878 INFO L226 Difference]: Without dead ends: 14470 [2020-09-24 16:13:40,892 INFO L675 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 [2020-09-24 16:13:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14470 states. [2020-09-24 16:13:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14470 to 7378. [2020-09-24 16:13:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7378 states. [2020-09-24 16:13:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 8978 transitions. [2020-09-24 16:13:41,141 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 8978 transitions. Word has length 410 [2020-09-24 16:13:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:41,142 INFO L479 AbstractCegarLoop]: Abstraction has 7378 states and 8978 transitions. [2020-09-24 16:13:41,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:13:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 8978 transitions. [2020-09-24 16:13:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 16:13:41,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:41,156 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:41,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:13:41,157 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:41,157 INFO L82 PathProgramCache]: Analyzing trace with hash 663980441, now seen corresponding path program 1 times [2020-09-24 16:13:41,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:41,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453110384] [2020-09-24 16:13:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:41,220 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:41,220 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:41,221 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:41,221 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:41,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-09-24 16:13:41,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:41,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:13:41,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-24 16:13:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-09-24 16:13:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:41,528 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:41,536 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:41,536 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:41,536 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:41,537 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:41,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:41,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:41,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:13:41,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:41,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:41,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:41,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:13:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:41,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453110384] [2020-09-24 16:13:41,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:41,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:41,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91673341] [2020-09-24 16:13:41,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:41,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:41,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:41,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:41,768 INFO L87 Difference]: Start difference. First operand 7378 states and 8978 transitions. Second operand 4 states. [2020-09-24 16:13:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:45,893 INFO L93 Difference]: Finished difference Result 20111 states and 24532 transitions. [2020-09-24 16:13:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:13:45,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 411 [2020-09-24 16:13:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:45,917 INFO L225 Difference]: With dead ends: 20111 [2020-09-24 16:13:45,917 INFO L226 Difference]: Without dead ends: 14049 [2020-09-24 16:13:45,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14049 states. [2020-09-24 16:13:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14049 to 14047. [2020-09-24 16:13:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14047 states. [2020-09-24 16:13:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14047 states to 14047 states and 16994 transitions. [2020-09-24 16:13:46,320 INFO L78 Accepts]: Start accepts. Automaton has 14047 states and 16994 transitions. Word has length 411 [2020-09-24 16:13:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:46,320 INFO L479 AbstractCegarLoop]: Abstraction has 14047 states and 16994 transitions. [2020-09-24 16:13:46,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:13:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 14047 states and 16994 transitions. [2020-09-24 16:13:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 16:13:46,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:46,344 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:46,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:13:46,345 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 928410137, now seen corresponding path program 1 times [2020-09-24 16:13:46,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:46,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660246909] [2020-09-24 16:13:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:46,444 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:46,445 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:46,445 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:46,445 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:46,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-09-24 16:13:46,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:46,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:13:46,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:46,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:46,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-09-24 16:13:46,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 16:13:46,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:46,806 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:46,814 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:46,814 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:46,814 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:46,814 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:46,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:46,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:46,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:46,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:46,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:46,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:46,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:47,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660246909] [2020-09-24 16:13:47,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:47,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:47,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185268490] [2020-09-24 16:13:47,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:47,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:47,059 INFO L87 Difference]: Start difference. First operand 14047 states and 16994 transitions. Second operand 5 states. [2020-09-24 16:13:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:51,326 INFO L93 Difference]: Finished difference Result 39701 states and 48051 transitions. [2020-09-24 16:13:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:13:51,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2020-09-24 16:13:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:51,369 INFO L225 Difference]: With dead ends: 39701 [2020-09-24 16:13:51,369 INFO L226 Difference]: Without dead ends: 25931 [2020-09-24 16:13:51,393 INFO L675 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 [2020-09-24 16:13:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25931 states. [2020-09-24 16:13:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25931 to 25929. [2020-09-24 16:13:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25929 states. [2020-09-24 16:13:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25929 states to 25929 states and 31173 transitions. [2020-09-24 16:13:52,183 INFO L78 Accepts]: Start accepts. Automaton has 25929 states and 31173 transitions. Word has length 411 [2020-09-24 16:13:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:52,183 INFO L479 AbstractCegarLoop]: Abstraction has 25929 states and 31173 transitions. [2020-09-24 16:13:52,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 25929 states and 31173 transitions. [2020-09-24 16:13:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 16:13:52,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:52,339 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:52,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:13:52,340 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1625460964, now seen corresponding path program 1 times [2020-09-24 16:13:52,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:52,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382103539] [2020-09-24 16:13:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:52,437 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:52,437 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:52,438 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:52,438 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:52,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-09-24 16:13:52,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:52,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:13:52,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:13:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 162 [2020-09-24 16:13:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 16:13:52,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:52,782 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:52,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:52,790 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:52,790 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:52,790 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:52,791 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:52,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:52,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:52,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:52,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:52,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:52,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382103539] [2020-09-24 16:13:52,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:52,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:13:52,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606028768] [2020-09-24 16:13:52,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:13:52,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:52,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:13:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:13:52,932 INFO L87 Difference]: Start difference. First operand 25929 states and 31173 transitions. Second operand 5 states. [2020-09-24 16:13:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:13:57,729 INFO L93 Difference]: Finished difference Result 52188 states and 62704 transitions. [2020-09-24 16:13:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:13:57,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2020-09-24 16:13:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:13:57,760 INFO L225 Difference]: With dead ends: 52188 [2020-09-24 16:13:57,760 INFO L226 Difference]: Without dead ends: 27013 [2020-09-24 16:13:57,795 INFO L675 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 [2020-09-24 16:13:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27013 states. [2020-09-24 16:13:58,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27013 to 26483. [2020-09-24 16:13:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26483 states. [2020-09-24 16:13:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26483 states to 26483 states and 31774 transitions. [2020-09-24 16:13:58,552 INFO L78 Accepts]: Start accepts. Automaton has 26483 states and 31774 transitions. Word has length 411 [2020-09-24 16:13:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:13:58,552 INFO L479 AbstractCegarLoop]: Abstraction has 26483 states and 31774 transitions. [2020-09-24 16:13:58,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:13:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26483 states and 31774 transitions. [2020-09-24 16:13:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-09-24 16:13:58,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:13:58,583 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:13:58,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:13:58,583 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:13:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:13:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1241105107, now seen corresponding path program 1 times [2020-09-24 16:13:58,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:13:58,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666732300] [2020-09-24 16:13:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:13:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:58,636 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:58,637 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:58,637 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:58,637 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:58,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 419 [2020-09-24 16:13:58,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:58,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:13:58,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:58,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:13:58,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-24 16:13:58,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:13:58,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:58,915 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 16:13:58,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:13:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:13:58,924 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:13:58,924 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:13:58,924 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:13:58,924 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:13:58,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:13:58,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:13:58,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:13:58,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:13:58,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:13:58,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:13:58,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:13:58,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:13:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:13:59,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666732300] [2020-09-24 16:13:59,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:13:59,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:13:59,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193393671] [2020-09-24 16:13:59,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:13:59,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:13:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:13:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:13:59,042 INFO L87 Difference]: Start difference. First operand 26483 states and 31774 transitions. Second operand 4 states. [2020-09-24 16:14:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:14:03,991 INFO L93 Difference]: Finished difference Result 76419 states and 91852 transitions. [2020-09-24 16:14:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:14:03,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 412 [2020-09-24 16:14:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:14:04,036 INFO L225 Difference]: With dead ends: 76419 [2020-09-24 16:14:04,037 INFO L226 Difference]: Without dead ends: 52157 [2020-09-24 16:14:04,060 INFO L675 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 [2020-09-24 16:14:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52157 states.