/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:09:16,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:09:16,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:09:16,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:09:16,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:09:16,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:09:16,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:09:16,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:09:16,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:09:16,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:09:16,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:09:16,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:09:16,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:09:16,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:09:16,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:09:16,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:09:16,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:09:16,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:09:16,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:09:16,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:09:16,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:09:16,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:09:16,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:09:16,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:09:17,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:09:17,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:09:17,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:09:17,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:09:17,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:09:17,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:09:17,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:09:17,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:09:17,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:09:17,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:09:17,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:09:17,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:09:17,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:09:17,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:09:17,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:09:17,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:09:17,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:09:17,025 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 [2020-10-12 15:09:17,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:09:17,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:09:17,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:09:17,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:09:17,069 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:09:17,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:09:17,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:09:17,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:09:17,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:09:17,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:09:17,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:09:17,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:09:17,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:09:17,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:09:17,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:09:17,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:09:17,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:09:17,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:09:17,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:09:17,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:09:17,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:09:17,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:09:17,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:09:17,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:09:17,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:09:17,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:09:17,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:09:17,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:09:17,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:09:17,075 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:09:17,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:09:17,406 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:09:17,410 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:09:17,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:09:17,412 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:09:17,413 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label01.c [2020-10-12 15:09:17,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/446af7e76/fd49bdeb95c24208b20a2e0d6fe3d834/FLAGfdf9c0c4d [2020-10-12 15:09:18,591 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:09:18,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label01.c [2020-10-12 15:09:18,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/446af7e76/fd49bdeb95c24208b20a2e0d6fe3d834/FLAGfdf9c0c4d [2020-10-12 15:09:18,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/446af7e76/fd49bdeb95c24208b20a2e0d6fe3d834 [2020-10-12 15:09:18,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:09:18,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:09:18,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:09:18,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:09:18,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:09:18,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:09:18" (1/1) ... [2020-10-12 15:09:18,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfcebea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:18, skipping insertion in model container [2020-10-12 15:09:18,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:09:18" (1/1) ... [2020-10-12 15:09:18,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:09:19,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:09:21,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:09:21,618 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:09:22,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:09:22,857 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:09:22,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22 WrapperNode [2020-10-12 15:09:22,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:09:22,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:09:22,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:09:22,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:09:22,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (1/1) ... [2020-10-12 15:09:22,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (1/1) ... [2020-10-12 15:09:22,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (1/1) ... [2020-10-12 15:09:22,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (1/1) ... [2020-10-12 15:09:23,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (1/1) ... [2020-10-12 15:09:23,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (1/1) ... [2020-10-12 15:09:23,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (1/1) ... [2020-10-12 15:09:23,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:09:23,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:09:23,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:09:23,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:09:23,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (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 [2020-10-12 15:09:23,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 15:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 15:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 15:09:23,407 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 15:09:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-12 15:09:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-12 15:09:23,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:09:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 15:09:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 15:09:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 15:09:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 15:09:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-12 15:09:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-12 15:09:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:09:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:09:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:09:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:09:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:09:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:09:36,079 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:09:36,079 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:09:36,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:09:36 BoogieIcfgContainer [2020-10-12 15:09:36,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:09:36,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:09:36,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:09:36,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:09:36,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:09:18" (1/3) ... [2020-10-12 15:09:36,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28836427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:09:36, skipping insertion in model container [2020-10-12 15:09:36,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:09:22" (2/3) ... [2020-10-12 15:09:36,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28836427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:09:36, skipping insertion in model container [2020-10-12 15:09:36,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:09:36" (3/3) ... [2020-10-12 15:09:36,112 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label01.c [2020-10-12 15:09:36,125 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:09:36,141 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:09:36,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:09:36,193 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:09:36,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:09:36,194 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:09:36,194 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:09:36,194 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:09:36,194 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:09:36,194 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:09:36,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:09:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-12 15:09:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 15:09:36,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:09:36,250 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] [2020-10-12 15:09:36,251 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:09:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:09:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash 443469052, now seen corresponding path program 1 times [2020-10-12 15:09:36,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:09:36,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38096979] [2020-10-12 15:09:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:09:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:09:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:09:37,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:09:37,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 15:09:37,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:09:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-12 15:09:37,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:09:37,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:09:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:09:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 15:09:37,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:09:37,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:09:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:09:37,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:09:37,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:09:37,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:09:37,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:09:37,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 15:09:37,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:09:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:09:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:09:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:09:37,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:09:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:09:37,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38096979] [2020-10-12 15:09:37,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:09:37,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:09:37,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054233458] [2020-10-12 15:09:37,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:09:37,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:09:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:09:37,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:09:37,342 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-12 15:10:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:10:17,905 INFO L93 Difference]: Finished difference Result 6516 states and 12364 transitions. [2020-10-12 15:10:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:10:17,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 15:10:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:10:17,974 INFO L225 Difference]: With dead ends: 6516 [2020-10-12 15:10:17,974 INFO L226 Difference]: Without dead ends: 4671 [2020-10-12 15:10:17,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:10:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2020-10-12 15:10:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4634. [2020-10-12 15:10:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4634 states. [2020-10-12 15:10:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 7692 transitions. [2020-10-12 15:10:18,324 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 7692 transitions. Word has length 69 [2020-10-12 15:10:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:10:18,327 INFO L479 AbstractCegarLoop]: Abstraction has 4634 states and 7692 transitions. [2020-10-12 15:10:18,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:10:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 7692 transitions. [2020-10-12 15:10:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-12 15:10:18,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:10:18,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:10:18,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:10:18,355 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:10:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:10:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash -881586968, now seen corresponding path program 1 times [2020-10-12 15:10:18,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:10:18,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913136656] [2020-10-12 15:10:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:10:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:10:18,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:10:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:10:19,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:10:20,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:10:20,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-12 15:10:20,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:10:20,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2387 [2020-10-12 15:10:20,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:10:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:10:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:10:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 15:10:20,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 15:10:20,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:10:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:10:20,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:10:20,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:10:20,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:10:20,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:10:20,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 15:10:20,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:10:20,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:10:20,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:10:20,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:10:20,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:10:21,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:10:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:10:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:10:21,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:10:21,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 15:10:21,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:10:21,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-12 15:10:21,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:10:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:10:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:10:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 15:10:21,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:10:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:10:21,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913136656] [2020-10-12 15:10:21,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:10:21,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:10:21,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907447139] [2020-10-12 15:10:21,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:10:21,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:10:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:10:21,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:10:21,473 INFO L87 Difference]: Start difference. First operand 4634 states and 7692 transitions. Second operand 7 states. [2020-10-12 15:11:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:11:06,284 INFO L93 Difference]: Finished difference Result 13871 states and 23238 transitions. [2020-10-12 15:11:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:11:06,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-10-12 15:11:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:11:06,335 INFO L225 Difference]: With dead ends: 13871 [2020-10-12 15:11:06,336 INFO L226 Difference]: Without dead ends: 9243 [2020-10-12 15:11:06,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:11:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9243 states. [2020-10-12 15:11:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9243 to 9112. [2020-10-12 15:11:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9112 states. [2020-10-12 15:11:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 13218 transitions. [2020-10-12 15:11:06,655 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 13218 transitions. Word has length 170 [2020-10-12 15:11:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:11:06,657 INFO L479 AbstractCegarLoop]: Abstraction has 9112 states and 13218 transitions. [2020-10-12 15:11:06,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:11:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 13218 transitions. [2020-10-12 15:11:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-12 15:11:06,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:11:06,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:11:06,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:11:06,668 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:11:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:11:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1231919828, now seen corresponding path program 1 times [2020-10-12 15:11:06,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:11:06,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621458954] [2020-10-12 15:11:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:11:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:11:06,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:06,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:07,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:07,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:08,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:11:08,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-12 15:11:08,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:11:08,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-12 15:11:08,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:11:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:11:08,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:11:08,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-12 15:11:08,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:11:08,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:11:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:11:08,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:08,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:11:08,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:11:08,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:11:08,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:11:08,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:11:08,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:11:08,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:11:08,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:11:08,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:11:08,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:11:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:11:08,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:08,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:11:08,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:11:08,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 15:11:08,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:11:08,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-12 15:11:08,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:11:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:11:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:11:08,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 15:11:08,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:11:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:11:09,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621458954] [2020-10-12 15:11:09,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:11:09,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:11:09,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230561509] [2020-10-12 15:11:09,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:11:09,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:11:09,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:11:09,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:11:09,099 INFO L87 Difference]: Start difference. First operand 9112 states and 13218 transitions. Second operand 7 states. [2020-10-12 15:12:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:12:13,476 INFO L93 Difference]: Finished difference Result 27525 states and 40905 transitions. [2020-10-12 15:12:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:12:13,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 192 [2020-10-12 15:12:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:12:13,572 INFO L225 Difference]: With dead ends: 27525 [2020-10-12 15:12:13,572 INFO L226 Difference]: Without dead ends: 18419 [2020-10-12 15:12:13,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:12:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18419 states. [2020-10-12 15:12:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18419 to 18160. [2020-10-12 15:12:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18160 states. [2020-10-12 15:12:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18160 states to 18160 states and 24210 transitions. [2020-10-12 15:12:14,076 INFO L78 Accepts]: Start accepts. Automaton has 18160 states and 24210 transitions. Word has length 192 [2020-10-12 15:12:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:12:14,079 INFO L479 AbstractCegarLoop]: Abstraction has 18160 states and 24210 transitions. [2020-10-12 15:12:14,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:12:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 18160 states and 24210 transitions. [2020-10-12 15:12:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-12 15:12:14,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:12:14,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:12:14,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:12:14,089 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:12:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:12:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1752475789, now seen corresponding path program 1 times [2020-10-12 15:12:14,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:12:14,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265332174] [2020-10-12 15:12:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:12:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:12:14,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:14,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:18,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:12:18,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-12 15:12:18,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:12:18,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4385 [2020-10-12 15:12:18,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:12:18,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:12:18,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:12:18,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-12 15:12:18,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:12:18,765 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-12 15:12:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:12:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:12:18,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:18,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:12:18,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:12:18,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:12:18,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:12:18,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:12:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:12:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:12:18,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:12:18,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:12:18,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:12:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:12:18,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:18,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:19,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:12:19,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 15:12:19,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:12:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-12 15:12:19,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:12:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:12:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:12:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 15:12:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:12:19,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-12 15:12:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:12:19,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:12:19,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:12:19,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:12:19,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:12:19,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-12 15:12:19,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:12:19,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:12:19,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:12:19,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 15:12:19,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:12:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-12 15:12:19,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265332174] [2020-10-12 15:12:19,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:12:19,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:12:19,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89682923] [2020-10-12 15:12:19,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:12:19,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:12:19,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:12:19,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:12:19,453 INFO L87 Difference]: Start difference. First operand 18160 states and 24210 transitions. Second operand 9 states.