/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_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:57:29,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:57:29,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:57:29,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:57:29,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:57:29,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:57:29,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:57:29,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:57:29,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:57:29,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:57:29,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:57:29,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:57:29,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:57:29,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:57:29,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:57:29,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:57:29,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:57:29,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:57:29,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:57:29,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:57:29,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:57:29,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:57:29,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:57:29,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:57:29,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:57:29,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:57:29,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:57:29,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:57:29,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:57:29,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:57:29,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:57:29,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:57:29,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:57:29,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:57:29,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:57:29,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:57:29,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:57:29,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:57:29,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:57:29,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:57:29,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:57:29,877 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 09:57:29,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:57:29,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:57:29,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:57:29,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:57:29,904 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:57:29,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:57:29,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:57:29,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:57:29,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:57:29,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:57:29,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:57:29,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:57:29,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:57:29,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:57:29,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:57:29,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:57:29,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:57:29,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:57:29,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:57:29,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:57:29,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:57:29,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:57:29,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:57:29,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:57:29,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:57:29,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:57:29,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:57:29,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:57:29,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:57:29,909 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 09:57:30,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:57:30,235 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:57:30,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:57:30,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:57:30,240 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:57:30,240 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label03.c [2020-10-13 09:57:30,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d381e74fc/9ce9a45abbde47ae8be29b281f24fda8/FLAG207c4c732 [2020-10-13 09:57:31,218 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:57:31,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label03.c [2020-10-13 09:57:31,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d381e74fc/9ce9a45abbde47ae8be29b281f24fda8/FLAG207c4c732 [2020-10-13 09:57:31,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d381e74fc/9ce9a45abbde47ae8be29b281f24fda8 [2020-10-13 09:57:31,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:57:31,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:57:31,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:57:31,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:57:31,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:57:31,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:57:31" (1/1) ... [2020-10-13 09:57:31,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332fc18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:31, skipping insertion in model container [2020-10-13 09:57:31,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:57:31" (1/1) ... [2020-10-13 09:57:31,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:57:31,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:57:34,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:57:34,019 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:57:35,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:57:35,291 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:57:35,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35 WrapperNode [2020-10-13 09:57:35,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:57:35,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:57:35,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:57:35,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:57:35,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (1/1) ... [2020-10-13 09:57:35,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (1/1) ... [2020-10-13 09:57:35,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (1/1) ... [2020-10-13 09:57:35,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (1/1) ... [2020-10-13 09:57:35,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (1/1) ... [2020-10-13 09:57:35,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (1/1) ... [2020-10-13 09:57:35,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (1/1) ... [2020-10-13 09:57:35,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:57:35,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:57:35,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:57:35,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:57:35,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (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 09:57:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:57:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:57:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:57:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:57:35,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 09:57:35,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 09:57:35,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 09:57:35,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 09:57:35,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:57:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:57:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:57:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 09:57:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 09:57:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 09:57:35,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 09:57:35,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:57:35,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:57:35,930 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:57:35,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:57:35,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:57:35,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:57:47,768 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:57:47,769 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:57:47,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:57:47 BoogieIcfgContainer [2020-10-13 09:57:47,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:57:47,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:57:47,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:57:47,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:57:47,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:57:31" (1/3) ... [2020-10-13 09:57:47,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a7291c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:57:47, skipping insertion in model container [2020-10-13 09:57:47,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:57:35" (2/3) ... [2020-10-13 09:57:47,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a7291c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:57:47, skipping insertion in model container [2020-10-13 09:57:47,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:57:47" (3/3) ... [2020-10-13 09:57:47,797 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label03.c [2020-10-13 09:57:47,809 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:57:47,817 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:57:47,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:57:47,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:57:47,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:57:47,860 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:57:47,860 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:57:47,860 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:57:47,860 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:57:47,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:57:47,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:57:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 09:57:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 09:57:47,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:57:47,914 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] [2020-10-13 09:57:47,915 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:57:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:57:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash 52435620, now seen corresponding path program 1 times [2020-10-13 09:57:47,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:57:47,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621920176] [2020-10-13 09:57:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:57:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:57:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:57:48,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:57:48,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 09:57:48,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:57:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-13 09:57:48,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:57:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:57:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:57:48,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 09:57:48,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:57:48,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:57:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:57:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:57:48,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:57:48,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:57:48,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:57:48,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 09:57:48,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:57:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:57:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:57:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:57:48,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:57:48,811 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 09:57:48,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621920176] [2020-10-13 09:57:48,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:57:48,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 09:57:48,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757418853] [2020-10-13 09:57:48,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 09:57:48,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:57:48,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 09:57:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 09:57:48,843 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 09:58:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:58:12,019 INFO L93 Difference]: Finished difference Result 5111 states and 9601 transitions. [2020-10-13 09:58:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:58:12,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-13 09:58:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:58:12,066 INFO L225 Difference]: With dead ends: 5111 [2020-10-13 09:58:12,066 INFO L226 Difference]: Without dead ends: 3270 [2020-10-13 09:58:12,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:58:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2020-10-13 09:58:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 3199. [2020-10-13 09:58:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-10-13 09:58:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 5483 transitions. [2020-10-13 09:58:12,348 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 5483 transitions. Word has length 63 [2020-10-13 09:58:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:58:12,350 INFO L479 AbstractCegarLoop]: Abstraction has 3199 states and 5483 transitions. [2020-10-13 09:58:12,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 09:58:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 5483 transitions. [2020-10-13 09:58:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 09:58:12,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:58:12,364 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, 1, 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 09:58:12,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:58:12,365 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:58:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:58:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash -412527432, now seen corresponding path program 1 times [2020-10-13 09:58:12,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:58:12,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433394918] [2020-10-13 09:58:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:58:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:12,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:12,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:13,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:13,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 09:58:13,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:58:13,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-13 09:58:13,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:58:13,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-13 09:58:13,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 09:58:13,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:58:13,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:58:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:13,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:13,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:13,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:58:13,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:13,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:58:13,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:13,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:58:13,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:13,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:58:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:58:13,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:58:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:14,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:14,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 09:58:14,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:14,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-13 09:58:14,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 09:58:14,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:58:14,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433394918] [2020-10-13 09:58:14,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:58:14,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:58:14,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267322720] [2020-10-13 09:58:14,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:58:14,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:58:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:58:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:58:14,185 INFO L87 Difference]: Start difference. First operand 3199 states and 5483 transitions. Second operand 5 states. [2020-10-13 09:58:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:58:43,267 INFO L93 Difference]: Finished difference Result 7887 states and 13849 transitions. [2020-10-13 09:58:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:58:43,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-10-13 09:58:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:58:43,298 INFO L225 Difference]: With dead ends: 7887 [2020-10-13 09:58:43,298 INFO L226 Difference]: Without dead ends: 4694 [2020-10-13 09:58:43,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:58:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2020-10-13 09:58:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4646. [2020-10-13 09:58:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4646 states. [2020-10-13 09:58:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 7460 transitions. [2020-10-13 09:58:43,506 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 7460 transitions. Word has length 135 [2020-10-13 09:58:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:58:43,510 INFO L479 AbstractCegarLoop]: Abstraction has 4646 states and 7460 transitions. [2020-10-13 09:58:43,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:58:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 7460 transitions. [2020-10-13 09:58:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 09:58:43,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:58:43,520 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, 1, 1, 1, 1, 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 09:58:43,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:58:43,521 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:58:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:58:43,521 INFO L82 PathProgramCache]: Analyzing trace with hash 969542030, now seen corresponding path program 1 times [2020-10-13 09:58:43,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:58:43,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617396372] [2020-10-13 09:58:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:58:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:43,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:44,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:44,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:44,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 09:58:44,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:58:44,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-13 09:58:44,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:58:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 09:58:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 09:58:44,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:44,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:58:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:44,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:44,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:58:44,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:44,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:58:44,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:44,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:58:44,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:44,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:58:44,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:44,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:58:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:58:44,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:58:44,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:58:44,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 09:58:44,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:58:44,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 09:58:44,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:58:44,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:58:44,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:58:44,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 09:58:44,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:58:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:58:44,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617396372] [2020-10-13 09:58:44,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:58:44,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:58:44,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639865724] [2020-10-13 09:58:44,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:58:44,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:58:44,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:58:44,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:58:44,937 INFO L87 Difference]: Start difference. First operand 4646 states and 7460 transitions. Second operand 6 states. [2020-10-13 09:59:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:59:15,524 INFO L93 Difference]: Finished difference Result 13533 states and 22024 transitions. [2020-10-13 09:59:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:59:15,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2020-10-13 09:59:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:59:15,570 INFO L225 Difference]: With dead ends: 13533 [2020-10-13 09:59:15,570 INFO L226 Difference]: Without dead ends: 8893 [2020-10-13 09:59:15,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:59:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8893 states. [2020-10-13 09:59:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8893 to 8886. [2020-10-13 09:59:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8886 states. [2020-10-13 09:59:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8886 states to 8886 states and 13991 transitions. [2020-10-13 09:59:15,823 INFO L78 Accepts]: Start accepts. Automaton has 8886 states and 13991 transitions. Word has length 138 [2020-10-13 09:59:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:59:15,824 INFO L479 AbstractCegarLoop]: Abstraction has 8886 states and 13991 transitions. [2020-10-13 09:59:15,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:59:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8886 states and 13991 transitions. [2020-10-13 09:59:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 09:59:15,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:59:15,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:59:15,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:59:15,833 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:59:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:59:15,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2077003174, now seen corresponding path program 1 times [2020-10-13 09:59:15,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:59:15,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209549692] [2020-10-13 09:59:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:59:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:15,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:16,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:16,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 09:59:16,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:16,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-13 09:59:16,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:16,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:59:16,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:59:16,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 09:59:16,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:59:16,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:59:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:16,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:16,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:16,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:59:16,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:16,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 09:59:16,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:59:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:59:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:59:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:16,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:59:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:59:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:59:16,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:59:16,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 09:59:16,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:59:16,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-13 09:59:16,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:59:16,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:59:16,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 09:59:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 09:59:16,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:59:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:59:16,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209549692] [2020-10-13 09:59:16,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:59:16,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 09:59:16,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904858387] [2020-10-13 09:59:16,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 09:59:16,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:59:16,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 09:59:16,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:59:16,671 INFO L87 Difference]: Start difference. First operand 8886 states and 13991 transitions. Second operand 7 states. [2020-10-13 10:00:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:00:04,462 INFO L93 Difference]: Finished difference Result 26626 states and 42613 transitions. [2020-10-13 10:00:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:00:04,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2020-10-13 10:00:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:00:04,542 INFO L225 Difference]: With dead ends: 26626 [2020-10-13 10:00:04,542 INFO L226 Difference]: Without dead ends: 17746 [2020-10-13 10:00:04,569 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 [2020-10-13 10:00:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17746 states. [2020-10-13 10:00:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17746 to 17576. [2020-10-13 10:00:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17576 states. [2020-10-13 10:00:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17576 states to 17576 states and 27013 transitions. [2020-10-13 10:00:05,026 INFO L78 Accepts]: Start accepts. Automaton has 17576 states and 27013 transitions. Word has length 144 [2020-10-13 10:00:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:00:05,026 INFO L479 AbstractCegarLoop]: Abstraction has 17576 states and 27013 transitions. [2020-10-13 10:00:05,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:00:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 17576 states and 27013 transitions. [2020-10-13 10:00:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 10:00:05,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:00:05,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:05,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:00:05,030 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:00:05,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:00:05,030 INFO L82 PathProgramCache]: Analyzing trace with hash 883220272, now seen corresponding path program 1 times [2020-10-13 10:00:05,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:00:05,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401640729] [2020-10-13 10:00:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:00:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:05,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:05,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:06,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:06,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 10:00:06,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:00:06,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1603 [2020-10-13 10:00:06,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:06,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:00:06,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 10:00:06,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:00:06,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:06,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:00:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:06,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:06,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:06,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:00:06,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:00:06,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:00:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:06,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:00:06,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:06,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:00:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:07,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:07,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:07,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 10:00:07,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:07,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-13 10:00:07,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:00:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:07,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:00:07,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:00:07,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401640729] [2020-10-13 10:00:07,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:00:07,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:00:07,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975141880] [2020-10-13 10:00:07,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:00:07,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:00:07,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:00:07,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:00:07,335 INFO L87 Difference]: Start difference. First operand 17576 states and 27013 transitions. Second operand 5 states. [2020-10-13 10:00:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:00:46,381 INFO L93 Difference]: Finished difference Result 35186 states and 54110 transitions. [2020-10-13 10:00:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:00:46,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-13 10:00:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:00:46,454 INFO L225 Difference]: With dead ends: 35186 [2020-10-13 10:00:46,455 INFO L226 Difference]: Without dead ends: 17580 [2020-10-13 10:00:46,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:00:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17580 states. [2020-10-13 10:00:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17580 to 17576. [2020-10-13 10:00:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17576 states. [2020-10-13 10:00:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17576 states to 17576 states and 27001 transitions. [2020-10-13 10:00:46,892 INFO L78 Accepts]: Start accepts. Automaton has 17576 states and 27001 transitions. Word has length 164 [2020-10-13 10:00:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:00:46,893 INFO L479 AbstractCegarLoop]: Abstraction has 17576 states and 27001 transitions. [2020-10-13 10:00:46,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:00:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 17576 states and 27001 transitions. [2020-10-13 10:00:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 10:00:46,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:00:46,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:00:46,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:00:46,898 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:00:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:00:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1888937816, now seen corresponding path program 1 times [2020-10-13 10:00:46,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:00:46,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619591142] [2020-10-13 10:00:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:00:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:46,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:47,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:48,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:48,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 10:00:48,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:00:48,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-13 10:00:48,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:48,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:00:48,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-13 10:00:48,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:00:48,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:48,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:00:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:48,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:48,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:48,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:00:48,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:48,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:00:48,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:00:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:48,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:00:48,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:48,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:00:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:00:48,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:00:48,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:00:48,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 10:00:48,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:00:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-13 10:00:48,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:00:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:00:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:00:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-13 10:00:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:00:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:00:48,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619591142] [2020-10-13 10:00:48,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:00:48,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:00:48,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170554286] [2020-10-13 10:00:48,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:00:48,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:00:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:00:48,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:00:48,736 INFO L87 Difference]: Start difference. First operand 17576 states and 27001 transitions. Second operand 5 states.