/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=NARROWEST --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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:13:56,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:13:56,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:13:56,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:13:56,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:13:56,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:13:56,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:13:56,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:13:56,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:13:56,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:13:56,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:13:56,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:13:56,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:13:56,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:13:56,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:13:56,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:13:56,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:13:56,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:13:56,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:13:56,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:13:57,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:13:57,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:13:57,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:13:57,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:13:57,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:13:57,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:13:57,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:13:57,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:13:57,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:13:57,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:13:57,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:13:57,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:13:57,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:13:57,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:13:57,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:13:57,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:13:57,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:13:57,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:13:57,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:13:57,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:13:57,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:13:57,021 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 [2020-10-13 10:13:57,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:13:57,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:13:57,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:13:57,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:13:57,064 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:13:57,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:13:57,065 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:13:57,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:13:57,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:13:57,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:13:57,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:13:57,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:13:57,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:13:57,068 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:13:57,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:13:57,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:13:57,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:13:57,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:13:57,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:13:57,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:13:57,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:13:57,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:13:57,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:13:57,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:13:57,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:13:57,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:13:57,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:13:57,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:13:57,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:13:57,072 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:13:57,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:13:57,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:13:57,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:13:57,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:13:57,491 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:13:57,492 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label59.c [2020-10-13 10:13:57,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc28a9e0/a459e85f9d40428aa8bb772a8b51c652/FLAGca8583fd8 [2020-10-13 10:13:58,708 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:13:58,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label59.c [2020-10-13 10:13:58,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc28a9e0/a459e85f9d40428aa8bb772a8b51c652/FLAGca8583fd8 [2020-10-13 10:13:59,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1dc28a9e0/a459e85f9d40428aa8bb772a8b51c652 [2020-10-13 10:13:59,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:13:59,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:13:59,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:13:59,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:13:59,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:13:59,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:13:59" (1/1) ... [2020-10-13 10:13:59,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1613be08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:13:59, skipping insertion in model container [2020-10-13 10:13:59,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:13:59" (1/1) ... [2020-10-13 10:13:59,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:13:59,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:14:02,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:14:02,261 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:14:03,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:14:03,577 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:14:03,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03 WrapperNode [2020-10-13 10:14:03,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:14:03,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:14:03,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:14:03,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:14:03,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (1/1) ... [2020-10-13 10:14:03,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (1/1) ... [2020-10-13 10:14:03,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (1/1) ... [2020-10-13 10:14:03,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (1/1) ... [2020-10-13 10:14:03,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (1/1) ... [2020-10-13 10:14:04,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (1/1) ... [2020-10-13 10:14:04,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (1/1) ... [2020-10-13 10:14:04,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:14:04,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:14:04,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:14:04,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:14:04,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (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 [2020-10-13 10:14:04,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:14:04,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:14:04,374 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:14:04,374 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:14:04,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:14:04,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:14:04,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:14:04,376 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:14:04,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:14:04,377 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:14:04,377 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:14:04,377 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:14:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:14:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:14:04,378 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:14:04,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:14:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:14:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:14:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:14:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:14:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:14:20,127 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:14:20,128 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:14:20,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:14:20 BoogieIcfgContainer [2020-10-13 10:14:20,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:14:20,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:14:20,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:14:20,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:14:20,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:13:59" (1/3) ... [2020-10-13 10:14:20,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a4ec9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:14:20, skipping insertion in model container [2020-10-13 10:14:20,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:14:03" (2/3) ... [2020-10-13 10:14:20,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a4ec9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:14:20, skipping insertion in model container [2020-10-13 10:14:20,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:14:20" (3/3) ... [2020-10-13 10:14:20,164 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label59.c [2020-10-13 10:14:20,178 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:14:20,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:14:20,213 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:14:20,256 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:14:20,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:14:20,256 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:14:20,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:14:20,257 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:14:20,257 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:14:20,257 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:14:20,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:14:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:14:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:14:20,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:14:20,328 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] [2020-10-13 10:14:20,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:14:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:14:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash 203787812, now seen corresponding path program 1 times [2020-10-13 10:14:20,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:14:20,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552367903] [2020-10-13 10:14:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:14:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:20,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:21,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:21,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:14:21,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:21,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-13 10:14:21,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:14:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:14:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:14:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:14:21,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:14:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:21,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:21,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:21,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:14:21,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:21,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:14:21,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:21,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:14:21,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:14:21,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:14:21,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:14:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:14:21,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552367903] [2020-10-13 10:14:21,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:14:21,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:14:21,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494515658] [2020-10-13 10:14:21,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:14:21,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:14:21,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:14:21,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:14:21,385 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:14:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:14:51,301 INFO L93 Difference]: Finished difference Result 5095 states and 9566 transitions. [2020-10-13 10:14:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:14:51,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-13 10:14:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:14:51,372 INFO L225 Difference]: With dead ends: 5095 [2020-10-13 10:14:51,373 INFO L226 Difference]: Without dead ends: 3254 [2020-10-13 10:14:51,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:14:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2020-10-13 10:14:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 3208. [2020-10-13 10:14:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3208 states. [2020-10-13 10:14:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 5177 transitions. [2020-10-13 10:14:51,706 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 5177 transitions. Word has length 31 [2020-10-13 10:14:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:14:51,707 INFO L479 AbstractCegarLoop]: Abstraction has 3208 states and 5177 transitions. [2020-10-13 10:14:51,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:14:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 5177 transitions. [2020-10-13 10:14:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 10:14:51,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:14:51,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:14:51,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:14:51,727 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:14:51,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:14:51,728 INFO L82 PathProgramCache]: Analyzing trace with hash 811639566, now seen corresponding path program 1 times [2020-10-13 10:14:51,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:14:51,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640277309] [2020-10-13 10:14:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:14:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:51,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:52,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:53,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:53,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:14:53,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:14:53,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1514 [2020-10-13 10:14:53,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:14:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 10:14:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:14:53,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:14:53,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:14:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:53,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:53,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:53,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:14:53,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:53,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:14:53,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:14:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:14:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:14:53,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:14:53,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:14:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:14:53,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:14:53,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:14:53,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:14:53,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:14:53,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-13 10:14:53,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:14:53,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:14:53,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:14:53,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:14:53,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:14:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:14:53,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640277309] [2020-10-13 10:14:53,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:14:53,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:14:53,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235575239] [2020-10-13 10:14:53,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:14:53,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:14:53,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:14:53,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:14:53,875 INFO L87 Difference]: Start difference. First operand 3208 states and 5177 transitions. Second operand 5 states. [2020-10-13 10:15:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:34,191 INFO L93 Difference]: Finished difference Result 7912 states and 13254 transitions. [2020-10-13 10:15:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:15:34,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-13 10:15:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:34,224 INFO L225 Difference]: With dead ends: 7912 [2020-10-13 10:15:34,224 INFO L226 Difference]: Without dead ends: 4710 [2020-10-13 10:15:34,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:15:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2020-10-13 10:15:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 4664. [2020-10-13 10:15:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4664 states. [2020-10-13 10:15:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 7159 transitions. [2020-10-13 10:15:34,386 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 7159 transitions. Word has length 106 [2020-10-13 10:15:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:34,387 INFO L479 AbstractCegarLoop]: Abstraction has 4664 states and 7159 transitions. [2020-10-13 10:15:34,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:15:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 7159 transitions. [2020-10-13 10:15:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 10:15:34,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:34,391 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:15:34,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:15:34,391 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1893883200, now seen corresponding path program 1 times [2020-10-13 10:15:34,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:34,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177958218] [2020-10-13 10:15:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:34,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:35,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:35,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:15:35,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:15:35,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-13 10:15:35,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:35,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:15:35,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:15:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:15:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:15:35,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:35,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:35,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:35,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:35,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:35,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:15:35,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:35,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:35,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:35,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:35,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:35,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:15:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:35,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:35,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:15:35,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:35,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 10:15:35,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:35,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:15:35,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:15:35,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:35,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177958218] [2020-10-13 10:15:35,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:15:35,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:15:35,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998585038] [2020-10-13 10:15:35,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:15:35,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:35,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:15:35,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:35,486 INFO L87 Difference]: Start difference. First operand 4664 states and 7159 transitions. Second operand 5 states. [2020-10-13 10:16:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:16:32,843 INFO L93 Difference]: Finished difference Result 13647 states and 21246 transitions. [2020-10-13 10:16:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:16:32,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-13 10:16:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:16:32,896 INFO L225 Difference]: With dead ends: 13647 [2020-10-13 10:16:32,897 INFO L226 Difference]: Without dead ends: 8989 [2020-10-13 10:16:32,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:16:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8989 states. [2020-10-13 10:16:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8989 to 8945. [2020-10-13 10:16:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8945 states. [2020-10-13 10:16:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 12926 transitions. [2020-10-13 10:16:33,160 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 12926 transitions. Word has length 107 [2020-10-13 10:16:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:16:33,162 INFO L479 AbstractCegarLoop]: Abstraction has 8945 states and 12926 transitions. [2020-10-13 10:16:33,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:16:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 12926 transitions. [2020-10-13 10:16:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 10:16:33,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:16:33,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:16:33,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:16:33,178 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:16:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:16:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1869911224, now seen corresponding path program 1 times [2020-10-13 10:16:33,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:16:33,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28387161] [2020-10-13 10:16:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:16:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:33,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:34,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:34,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:16:34,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:16:34,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-13 10:16:34,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:16:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 10:16:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:16:34,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:16:34,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:16:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:34,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:34,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:34,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:16:34,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:16:34,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:16:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:16:34,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:34,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:16:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:16:34,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:16:34,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:16:34,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:16:34,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:16:34,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-13 10:16:34,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:16:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:16:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:16:34,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 10:16:34,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:16:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:16:34,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28387161] [2020-10-13 10:16:34,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:16:34,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:16:34,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380282268] [2020-10-13 10:16:34,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:16:34,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:16:34,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:16:34,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:16:34,549 INFO L87 Difference]: Start difference. First operand 8945 states and 12926 transitions. Second operand 5 states. [2020-10-13 10:17:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:17:19,302 INFO L93 Difference]: Finished difference Result 26347 states and 38716 transitions. [2020-10-13 10:17:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:17:19,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-13 10:17:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:17:19,377 INFO L225 Difference]: With dead ends: 26347 [2020-10-13 10:17:19,378 INFO L226 Difference]: Without dead ends: 17408 [2020-10-13 10:17:19,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:17:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2020-10-13 10:17:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 17397. [2020-10-13 10:17:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17397 states. [2020-10-13 10:17:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17397 states to 17397 states and 22610 transitions. [2020-10-13 10:17:19,906 INFO L78 Accepts]: Start accepts. Automaton has 17397 states and 22610 transitions. Word has length 111 [2020-10-13 10:17:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:17:19,907 INFO L479 AbstractCegarLoop]: Abstraction has 17397 states and 22610 transitions. [2020-10-13 10:17:19,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:17:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 17397 states and 22610 transitions. [2020-10-13 10:17:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 10:17:19,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:17:19,911 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:17:19,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:17:19,911 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:17:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:17:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1374806165, now seen corresponding path program 1 times [2020-10-13 10:17:19,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:17:19,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564947013] [2020-10-13 10:17:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:17:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:20,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:20,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:20,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 10:17:20,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:17:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-13 10:17:20,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:17:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-13 10:17:20,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:17:20,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:17:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:20,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:20,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:20,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:17:20,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:20,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:17:20,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:20,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:17:20,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:20,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:17:20,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:20,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:17:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:17:20,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:17:21,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:17:21,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:17:21,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:17:21,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 10:17:21,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:17:21,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:17:21,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:17:21,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 10:17:21,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:17:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:17:21,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564947013] [2020-10-13 10:17:21,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:17:21,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:17:21,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692655690] [2020-10-13 10:17:21,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:17:21,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:17:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:17:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:17:21,084 INFO L87 Difference]: Start difference. First operand 17397 states and 22610 transitions. Second operand 5 states.