/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:34:15,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:34:15,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:34:15,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:34:15,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:34:15,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:34:15,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:34:15,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:34:15,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:34:15,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:34:15,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:34:15,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:34:15,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:34:15,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:34:15,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:34:15,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:34:15,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:34:15,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:34:15,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:34:15,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:34:15,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:34:16,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:34:16,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:34:16,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:34:16,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:34:16,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:34:16,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:34:16,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:34:16,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:34:16,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:34:16,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:34:16,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:34:16,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:34:16,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:34:16,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:34:16,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:34:16,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:34:16,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:34:16,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:34:16,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:34:16,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:34:16,027 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 [2020-09-21 11:34:16,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:34:16,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:34:16,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:34:16,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:34:16,092 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:34:16,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:34:16,092 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:34:16,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:34:16,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:34:16,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:34:16,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:34:16,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:34:16,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:34:16,096 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:34:16,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:34:16,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:34:16,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:34:16,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:34:16,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:34:16,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:34:16,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:34:16,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:34:16,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:34:16,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:34:16,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:34:16,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:34:16,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:34:16,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:34:16,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:34:16,099 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:34:16,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:34:16,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:34:16,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:34:16,636 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:34:16,638 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:34:16,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 11:34:16,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5776a671f/5878bf3ceea840d38b208e36e7d6d7a7/FLAG9e5b05a89 [2020-09-21 11:34:17,517 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:34:17,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 11:34:17,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5776a671f/5878bf3ceea840d38b208e36e7d6d7a7/FLAG9e5b05a89 [2020-09-21 11:34:17,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5776a671f/5878bf3ceea840d38b208e36e7d6d7a7 [2020-09-21 11:34:17,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:34:17,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:34:17,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:17,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:34:17,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:34:17,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:17" (1/1) ... [2020-09-21 11:34:17,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255d8a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:17, skipping insertion in model container [2020-09-21 11:34:17,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:17" (1/1) ... [2020-09-21 11:34:17,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:34:17,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:34:19,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:19,515 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:34:20,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:20,708 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:34:20,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20 WrapperNode [2020-09-21 11:34:20,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:20,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:34:20,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:34:20,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:34:20,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (1/1) ... [2020-09-21 11:34:20,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (1/1) ... [2020-09-21 11:34:20,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (1/1) ... [2020-09-21 11:34:20,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (1/1) ... [2020-09-21 11:34:20,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (1/1) ... [2020-09-21 11:34:20,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (1/1) ... [2020-09-21 11:34:20,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (1/1) ... [2020-09-21 11:34:20,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:34:20,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:34:20,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:34:20,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:34:20,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (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 [2020-09-21 11:34:21,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:34:21,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:34:21,041 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:34:21,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:34:21,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:34:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:34:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 11:34:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:34:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 11:34:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:34:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:34:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 11:34:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 11:34:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 11:34:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 11:34:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 11:34:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 11:34:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-09-21 11:34:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 11:34:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:34:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:34:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:34:21,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:34:25,306 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:34:25,307 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:34:25,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:25 BoogieIcfgContainer [2020-09-21 11:34:25,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:34:25,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:34:25,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:34:25,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:34:25,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:34:17" (1/3) ... [2020-09-21 11:34:25,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121fecee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:25, skipping insertion in model container [2020-09-21 11:34:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:20" (2/3) ... [2020-09-21 11:34:25,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121fecee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:25, skipping insertion in model container [2020-09-21 11:34:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:25" (3/3) ... [2020-09-21 11:34:25,332 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-21 11:34:25,344 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:34:25,357 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-21 11:34:25,381 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-21 11:34:25,421 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:34:25,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:34:25,422 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:34:25,422 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:34:25,422 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:34:25,422 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:34:25,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:34:25,423 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:34:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-09-21 11:34:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-09-21 11:34:25,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:25,524 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, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:25,525 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-09-21 11:34:25,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:25,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707792433] [2020-09-21 11:34:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:27,739 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:27,741 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:27,741 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:27,741 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:27,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 480 [2020-09-21 11:34:27,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-21 11:34:27,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:34:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:34:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-09-21 11:34:27,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:29,445 WARN L193 SmtUtils]: Spent 856.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-09-21 11:34:29,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:29,462 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:29,462 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:29,462 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:29,463 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:29,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:29,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:29,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:29,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:29,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:29,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:29,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707792433] [2020-09-21 11:34:29,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:29,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:34:29,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685070543] [2020-09-21 11:34:29,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:34:29,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:29,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:34:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:34:29,956 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 5 states. [2020-09-21 11:34:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:34:47,941 INFO L93 Difference]: Finished difference Result 4125 states and 7467 transitions. [2020-09-21 11:34:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:34:47,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-09-21 11:34:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:34:47,990 INFO L225 Difference]: With dead ends: 4125 [2020-09-21 11:34:47,990 INFO L226 Difference]: Without dead ends: 2741 [2020-09-21 11:34:48,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:34:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-09-21 11:34:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-09-21 11:34:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-09-21 11:34:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4398 transitions. [2020-09-21 11:34:48,230 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4398 transitions. Word has length 473 [2020-09-21 11:34:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:34:48,232 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 4398 transitions. [2020-09-21 11:34:48,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:34:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4398 transitions. [2020-09-21 11:34:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-09-21 11:34:48,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:48,256 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:48,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:34:48,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash -369254340, now seen corresponding path program 1 times [2020-09-21 11:34:48,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:48,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516339642] [2020-09-21 11:34:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:48,643 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:48,644 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:48,644 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:48,644 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:48,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 482 [2020-09-21 11:34:48,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:34:48,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:34:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-09-21 11:34:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:50,150 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-09-21 11:34:50,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:50,162 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:50,162 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:50,162 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:50,163 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:50,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:50,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:50,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:50,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:50,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:50,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:50,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516339642] [2020-09-21 11:34:50,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:50,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:50,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989496660] [2020-09-21 11:34:50,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:50,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:50,495 INFO L87 Difference]: Start difference. First operand 2688 states and 4398 transitions. Second operand 4 states. [2020-09-21 11:35:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:09,909 INFO L93 Difference]: Finished difference Result 7793 states and 12713 transitions. [2020-09-21 11:35:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:35:09,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-09-21 11:35:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:09,939 INFO L225 Difference]: With dead ends: 7793 [2020-09-21 11:35:09,939 INFO L226 Difference]: Without dead ends: 5319 [2020-09-21 11:35:09,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-09-21 11:35:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-09-21 11:35:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-09-21 11:35:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8596 transitions. [2020-09-21 11:35:10,146 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8596 transitions. Word has length 475 [2020-09-21 11:35:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:10,148 INFO L479 AbstractCegarLoop]: Abstraction has 5268 states and 8596 transitions. [2020-09-21 11:35:10,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8596 transitions. [2020-09-21 11:35:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-09-21 11:35:10,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:10,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:10,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:35:10,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:10,171 INFO L82 PathProgramCache]: Analyzing trace with hash -567190772, now seen corresponding path program 1 times [2020-09-21 11:35:10,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:10,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267343460] [2020-09-21 11:35:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:10,287 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:10,287 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:10,287 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:10,288 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:10,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-09-21 11:35:10,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:10,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:35:10,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:35:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:35:10,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:11,424 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-09-21 11:35:11,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:11,443 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:11,444 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:11,444 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:11,444 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:11,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:11,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:11,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:11,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:11,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:11,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267343460] [2020-09-21 11:35:11,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:11,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:11,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785998171] [2020-09-21 11:35:11,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:11,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:11,676 INFO L87 Difference]: Start difference. First operand 5268 states and 8596 transitions. Second operand 4 states.