/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:45:21,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:45:21,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:45:21,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:45:21,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:45:21,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:45:21,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:45:21,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:45:21,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:45:21,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:45:21,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:45:21,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:45:21,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:45:21,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:45:21,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:45:21,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:45:21,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:45:21,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:45:21,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:45:21,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:45:21,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:45:21,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:45:21,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:45:21,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:45:21,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:45:21,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:45:21,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:45:21,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:45:21,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:45:21,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:45:21,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:45:21,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:45:21,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:45:21,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:45:21,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:45:21,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:45:21,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:45:21,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:45:21,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:45:21,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:45:21,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:45:21,591 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 20:45:21,637 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:45:21,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:45:21,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:45:21,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:45:21,640 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:45:21,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:45:21,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:45:21,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:45:21,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:45:21,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:45:21,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:45:21,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:45:21,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:45:21,644 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:45:21,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:45:21,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:45:21,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:45:21,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:45:21,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:45:21,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:45:21,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:45:21,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:45:21,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:45:21,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:45:21,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:45:21,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:45:21,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:45:21,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:45:21,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:45:21,647 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:45:22,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:45:22,148 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:45:22,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:45:22,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:45:22,155 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:45:22,157 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 20:45:22,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/994c8d6ca/63dc3e168e254ecaaf6d3e3a717dee4c/FLAGe919df3f9 [2020-09-24 20:45:22,964 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:45:22,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 20:45:22,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/994c8d6ca/63dc3e168e254ecaaf6d3e3a717dee4c/FLAGe919df3f9 [2020-09-24 20:45:23,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/994c8d6ca/63dc3e168e254ecaaf6d3e3a717dee4c [2020-09-24 20:45:23,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:45:23,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:45:23,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:23,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:45:23,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:45:23,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:23" (1/1) ... [2020-09-24 20:45:23,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a00abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:23, skipping insertion in model container [2020-09-24 20:45:23,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:23" (1/1) ... [2020-09-24 20:45:23,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:45:23,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:45:23,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:23,995 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:45:24,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:24,398 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:45:24,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24 WrapperNode [2020-09-24 20:45:24,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:24,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:45:24,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:45:24,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:45:24,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (1/1) ... [2020-09-24 20:45:24,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (1/1) ... [2020-09-24 20:45:24,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (1/1) ... [2020-09-24 20:45:24,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (1/1) ... [2020-09-24 20:45:24,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (1/1) ... [2020-09-24 20:45:24,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (1/1) ... [2020-09-24 20:45:24,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (1/1) ... [2020-09-24 20:45:24,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:45:24,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:45:24,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:45:24,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:45:24,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (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 20:45:24,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:45:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:45:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:45:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:45:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:45:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:45:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 20:45:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:45:24,676 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 20:45:24,676 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:45:24,676 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:45:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 20:45:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 20:45:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 20:45:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 20:45:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 20:45:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:45:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 20:45:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:45:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:45:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:45:26,792 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:45:26,793 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:45:26,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:26 BoogieIcfgContainer [2020-09-24 20:45:26,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:45:26,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:45:26,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:45:26,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:45:26,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:45:23" (1/3) ... [2020-09-24 20:45:26,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e06060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:26, skipping insertion in model container [2020-09-24 20:45:26,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:24" (2/3) ... [2020-09-24 20:45:26,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e06060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:26, skipping insertion in model container [2020-09-24 20:45:26,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:26" (3/3) ... [2020-09-24 20:45:26,818 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 20:45:26,830 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:45:26,842 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-24 20:45:26,866 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-24 20:45:26,902 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:45:26,902 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:45:26,903 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:45:26,903 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:45:26,903 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:45:26,903 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:45:26,903 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:45:26,903 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:45:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-24 20:45:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-24 20:45:26,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:26,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:26,995 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-24 20:45:27,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:27,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906932626] [2020-09-24 20:45:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:27,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:28,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:29,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:32,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:32,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:32,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-24 20:45:32,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:45:32,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-09-24 20:45:32,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:32,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-09-24 20:45:32,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 20:45:32,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:45:33,194 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 20:45:33,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:33,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:33,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:33,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 20:45:33,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:33,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 20:45:33,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:33,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:33,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:33,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:33,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:33,715 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 20:45:33,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906932626] [2020-09-24 20:45:33,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:33,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:33,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690707615] [2020-09-24 20:45:33,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:33,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:33,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:33,767 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 5 states. [2020-09-24 20:45:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:42,948 INFO L93 Difference]: Finished difference Result 3240 states and 4175 transitions. [2020-09-24 20:45:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:45:42,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-24 20:45:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:42,990 INFO L225 Difference]: With dead ends: 3240 [2020-09-24 20:45:42,991 INFO L226 Difference]: Without dead ends: 1934 [2020-09-24 20:45:43,004 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 20:45:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-09-24 20:45:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1806. [2020-09-24 20:45:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1806 states. [2020-09-24 20:45:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2142 transitions. [2020-09-24 20:45:43,204 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2142 transitions. Word has length 456 [2020-09-24 20:45:43,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:43,210 INFO L479 AbstractCegarLoop]: Abstraction has 1806 states and 2142 transitions. [2020-09-24 20:45:43,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2142 transitions. [2020-09-24 20:45:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-24 20:45:43,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:43,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:43,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:45:43,232 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1498307915, now seen corresponding path program 1 times [2020-09-24 20:45:43,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:43,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163184433] [2020-09-24 20:45:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:43,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:43,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:44,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:44,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:44,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:48,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:48,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-24 20:45:48,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:45:48,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-09-24 20:45:48,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-09-24 20:45:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-24 20:45:48,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:45:48,909 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 20:45:48,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:48,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:48,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 20:45:48,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:48,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-24 20:45:48,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:49,443 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 20:45:49,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163184433] [2020-09-24 20:45:49,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:49,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:49,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676562673] [2020-09-24 20:45:49,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:49,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:49,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:49,454 INFO L87 Difference]: Start difference. First operand 1806 states and 2142 transitions. Second operand 5 states. [2020-09-24 20:45:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:56,890 INFO L93 Difference]: Finished difference Result 4719 states and 5634 transitions. [2020-09-24 20:45:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:45:56,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 457 [2020-09-24 20:45:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:56,909 INFO L225 Difference]: With dead ends: 4719 [2020-09-24 20:45:56,910 INFO L226 Difference]: Without dead ends: 3313 [2020-09-24 20:45:56,914 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 20:45:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2020-09-24 20:45:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 3204. [2020-09-24 20:45:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3204 states. [2020-09-24 20:45:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 3824 transitions. [2020-09-24 20:45:57,036 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 3824 transitions. Word has length 457 [2020-09-24 20:45:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:57,037 INFO L479 AbstractCegarLoop]: Abstraction has 3204 states and 3824 transitions. [2020-09-24 20:45:57,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 3824 transitions. [2020-09-24 20:45:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-09-24 20:45:57,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:57,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:45:57,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:45:57,048 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash -742049671, now seen corresponding path program 1 times [2020-09-24 20:45:57,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:57,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449922900] [2020-09-24 20:45:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:57,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:57,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:57,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:58,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:00,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:00,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:01,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:02,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:02,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:02,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 465 [2020-09-24 20:46:02,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 20:46:02,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 20:46:02,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:02,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:46:02,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-09-24 20:46:02,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-24 20:46:02,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:46:02,601 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 20:46:02,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:46:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:02,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:02,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:02,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 20:46:02,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:46:02,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 20:46:02,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:02,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:46:02,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:46:02,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:46:02,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:46:02,927 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 20:46:02,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449922900] [2020-09-24 20:46:02,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:46:02,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:46:02,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486830765] [2020-09-24 20:46:02,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:46:02,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:46:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:46:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:46:02,931 INFO L87 Difference]: Start difference. First operand 3204 states and 3824 transitions. Second operand 5 states. [2020-09-24 20:46:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:46:09,629 INFO L93 Difference]: Finished difference Result 8998 states and 10769 transitions. [2020-09-24 20:46:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:46:09,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 458 [2020-09-24 20:46:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:46:09,654 INFO L225 Difference]: With dead ends: 8998 [2020-09-24 20:46:09,654 INFO L226 Difference]: Without dead ends: 6040 [2020-09-24 20:46:09,662 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 20:46:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2020-09-24 20:46:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 5898. [2020-09-24 20:46:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5898 states. [2020-09-24 20:46:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5898 states to 5898 states and 7041 transitions. [2020-09-24 20:46:09,866 INFO L78 Accepts]: Start accepts. Automaton has 5898 states and 7041 transitions. Word has length 458 [2020-09-24 20:46:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:46:09,867 INFO L479 AbstractCegarLoop]: Abstraction has 5898 states and 7041 transitions. [2020-09-24 20:46:09,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:46:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5898 states and 7041 transitions. [2020-09-24 20:46:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-09-24 20:46:09,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:46:09,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:46:09,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:46:09,889 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:46:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:46:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash -333040505, now seen corresponding path program 1 times [2020-09-24 20:46:09,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:46:09,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348170512] [2020-09-24 20:46:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:46:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:10,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:12,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking...