/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:27:23,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:27:23,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:27:23,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:27:23,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:27:23,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:27:23,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:27:23,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:27:23,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:27:23,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:27:23,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:27:23,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:27:23,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:27:23,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:27:23,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:27:23,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:27:23,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:27:23,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:27:23,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:27:23,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:27:23,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:27:23,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:27:23,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:27:23,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:27:23,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:27:23,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:27:23,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:27:23,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:27:23,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:27:23,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:27:23,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:27:23,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:27:23,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:27:23,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:27:23,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:27:23,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:27:23,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:27:23,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:27:23,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:27:23,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:27:23,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:27:23,909 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 [2020-09-25 11:27:23,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:27:23,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:27:23,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:27:23,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:27:23,938 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:27:23,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:27:23,938 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:27:23,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:27:23,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:27:23,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:27:23,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:27:23,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:27:23,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:27:23,942 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:27:23,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:27:23,942 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:27:23,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:27:23,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:27:23,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:27:23,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:27:23,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:27:23,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:27:23,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:27:23,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:27:23,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:27:23,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:27:23,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:27:23,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:27:23,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:27:23,948 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:27:24,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:27:24,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:27:24,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:27:24,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:27:24,467 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:27:24,468 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 11:27:24,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c824d7bb/cd7835295d554f198097d538e075c213/FLAG503114624 [2020-09-25 11:27:25,308 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:27:25,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 11:27:25,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c824d7bb/cd7835295d554f198097d538e075c213/FLAG503114624 [2020-09-25 11:27:25,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c824d7bb/cd7835295d554f198097d538e075c213 [2020-09-25 11:27:25,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:27:25,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:27:25,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:25,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:27:25,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:27:25,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:25" (1/1) ... [2020-09-25 11:27:25,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4085ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:25, skipping insertion in model container [2020-09-25 11:27:25,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:25" (1/1) ... [2020-09-25 11:27:25,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:27:25,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:27:26,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:26,365 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:27:26,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:26,902 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:27:26,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26 WrapperNode [2020-09-25 11:27:26,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:26,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:27:26,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:27:26,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:27:26,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (1/1) ... [2020-09-25 11:27:26,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (1/1) ... [2020-09-25 11:27:26,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (1/1) ... [2020-09-25 11:27:26,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (1/1) ... [2020-09-25 11:27:26,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (1/1) ... [2020-09-25 11:27:27,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (1/1) ... [2020-09-25 11:27:27,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (1/1) ... [2020-09-25 11:27:27,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:27:27,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:27:27,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:27:27,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:27:27,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (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 [2020-09-25 11:27:27,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:27:27,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:27:27,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:27:27,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:27:27,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:27:27,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 11:27:27,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 11:27:27,159 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 11:27:27,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:27:27,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:27:27,160 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 11:27:27,160 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 11:27:27,160 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 11:27:27,161 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 11:27:27,161 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 11:27:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 11:27:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 11:27:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:27:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:27:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:27:29,285 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:27:29,286 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:27:29,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:29 BoogieIcfgContainer [2020-09-25 11:27:29,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:27:29,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:27:29,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:27:29,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:27:29,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:27:25" (1/3) ... [2020-09-25 11:27:29,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9bce60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:29, skipping insertion in model container [2020-09-25 11:27:29,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:26" (2/3) ... [2020-09-25 11:27:29,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9bce60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:27:29, skipping insertion in model container [2020-09-25 11:27:29,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:27:29" (3/3) ... [2020-09-25 11:27:29,311 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-09-25 11:27:29,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:27:29,334 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-25 11:27:29,356 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-25 11:27:29,392 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:27:29,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:27:29,393 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:27:29,393 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:27:29,393 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:27:29,393 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:27:29,393 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:27:29,393 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:27:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states. [2020-09-25 11:27:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 11:27:29,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:29,487 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, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:29,488 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1578062424, now seen corresponding path program 1 times [2020-09-25 11:27:29,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:29,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419762180] [2020-09-25 11:27:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:30,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:30,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:31,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:31,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:31,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:31,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:34,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:35,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 11:27:35,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:27:35,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 11:27:35,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:35,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:27:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-09-25 11:27:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 11:27:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 11:27:35,865 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 11:27:35,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:35,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:35,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:35,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 11:27:35,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:35,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 11:27:35,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:35,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:35,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:27:36,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419762180] [2020-09-25 11:27:36,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:36,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:27:36,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476818730] [2020-09-25 11:27:36,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:27:36,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:36,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:27:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:27:36,519 INFO L87 Difference]: Start difference. First operand 1237 states. Second operand 4 states. [2020-09-25 11:27:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:41,845 INFO L93 Difference]: Finished difference Result 2024 states and 2590 transitions. [2020-09-25 11:27:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:27:41,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 465 [2020-09-25 11:27:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:41,881 INFO L225 Difference]: With dead ends: 2024 [2020-09-25 11:27:41,882 INFO L226 Difference]: Without dead ends: 1455 [2020-09-25 11:27:41,891 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 [2020-09-25 11:27:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-09-25 11:27:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1448. [2020-09-25 11:27:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-09-25 11:27:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1727 transitions. [2020-09-25 11:27:42,042 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1727 transitions. Word has length 465 [2020-09-25 11:27:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:42,044 INFO L479 AbstractCegarLoop]: Abstraction has 1448 states and 1727 transitions. [2020-09-25 11:27:42,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:27:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1727 transitions. [2020-09-25 11:27:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-09-25 11:27:42,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:42,057 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, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:42,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:27:42,058 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash 888544568, now seen corresponding path program 1 times [2020-09-25 11:27:42,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:42,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003837937] [2020-09-25 11:27:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:42,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:42,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:43,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:43,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:46,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:47,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:47,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 472 [2020-09-25 11:27:47,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:27:47,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 11:27:47,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:47,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:47,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:27:47,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-09-25 11:27:47,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-25 11:27:47,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:27:47,998 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 11:27:48,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:27:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:48,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:27:48,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 11:27:48,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:27:48,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 11:27:48,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:27:48,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:27:48,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:27:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:27:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:27:48,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:27:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:27:48,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003837937] [2020-09-25 11:27:48,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:27:48,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:27:48,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527956547] [2020-09-25 11:27:48,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:27:48,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:27:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:27:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:27:48,521 INFO L87 Difference]: Start difference. First operand 1448 states and 1727 transitions. Second operand 5 states. [2020-09-25 11:27:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:27:55,979 INFO L93 Difference]: Finished difference Result 3758 states and 4526 transitions. [2020-09-25 11:27:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:27:55,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 465 [2020-09-25 11:27:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:27:55,996 INFO L225 Difference]: With dead ends: 3758 [2020-09-25 11:27:55,996 INFO L226 Difference]: Without dead ends: 2632 [2020-09-25 11:27:56,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:27:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2020-09-25 11:27:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2505. [2020-09-25 11:27:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2505 states. [2020-09-25 11:27:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3021 transitions. [2020-09-25 11:27:56,096 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3021 transitions. Word has length 465 [2020-09-25 11:27:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:27:56,097 INFO L479 AbstractCegarLoop]: Abstraction has 2505 states and 3021 transitions. [2020-09-25 11:27:56,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:27:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3021 transitions. [2020-09-25 11:27:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-09-25 11:27:56,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:27:56,104 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:27:56,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:27:56,105 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:27:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:27:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash 187069046, now seen corresponding path program 1 times [2020-09-25 11:27:56,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:27:56,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871144473] [2020-09-25 11:27:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:27:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:27:56,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:56,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:57,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:27:58,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:00,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:01,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:01,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:01,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-09-25 11:28:01,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:28:01,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-09-25 11:28:01,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:01,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:28:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 184 [2020-09-25 11:28:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-25 11:28:01,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:01,836 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-09-25 11:28:01,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:01,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:01,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:01,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 11:28:01,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:01,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 11:28:01,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:01,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:01,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:01,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:01,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:01,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:28:02,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871144473] [2020-09-25 11:28:02,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:02,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:28:02,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658618257] [2020-09-25 11:28:02,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:28:02,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:28:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:28:02,274 INFO L87 Difference]: Start difference. First operand 2505 states and 3021 transitions. Second operand 5 states. [2020-09-25 11:28:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:09,508 INFO L93 Difference]: Finished difference Result 6744 states and 8175 transitions. [2020-09-25 11:28:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:28:09,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 466 [2020-09-25 11:28:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:09,532 INFO L225 Difference]: With dead ends: 6744 [2020-09-25 11:28:09,532 INFO L226 Difference]: Without dead ends: 4687 [2020-09-25 11:28:09,537 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 [2020-09-25 11:28:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2020-09-25 11:28:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 4560. [2020-09-25 11:28:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2020-09-25 11:28:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 5523 transitions. [2020-09-25 11:28:09,748 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 5523 transitions. Word has length 466 [2020-09-25 11:28:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:09,749 INFO L479 AbstractCegarLoop]: Abstraction has 4560 states and 5523 transitions. [2020-09-25 11:28:09,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:28:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 5523 transitions. [2020-09-25 11:28:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-09-25 11:28:09,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:09,763 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:28:09,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:28:09,763 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:09,764 INFO L82 PathProgramCache]: Analyzing trace with hash -658511710, now seen corresponding path program 1 times [2020-09-25 11:28:09,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:09,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774034864] [2020-09-25 11:28:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:09,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:11,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:12,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking...