/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/Problem13_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 21:27:05,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 21:27:05,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 21:27:05,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 21:27:05,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 21:27:05,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 21:27:05,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 21:27:05,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 21:27:05,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 21:27:05,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 21:27:05,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 21:27:05,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 21:27:05,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 21:27:05,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 21:27:05,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 21:27:05,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 21:27:05,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 21:27:05,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 21:27:05,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 21:27:05,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 21:27:05,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 21:27:05,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 21:27:05,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 21:27:05,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 21:27:05,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 21:27:05,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 21:27:05,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 21:27:05,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 21:27:05,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 21:27:05,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 21:27:05,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 21:27:05,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 21:27:05,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 21:27:05,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 21:27:05,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 21:27:05,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 21:27:05,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 21:27:05,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 21:27:05,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 21:27:05,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 21:27:05,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 21:27:05,911 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 [2020-10-14 21:27:05,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 21:27:05,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 21:27:05,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 21:27:05,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 21:27:05,937 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 21:27:05,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 21:27:05,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 21:27:05,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 21:27:05,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 21:27:05,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 21:27:05,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 21:27:05,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 21:27:05,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 21:27:05,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 21:27:05,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 21:27:05,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 21:27:05,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 21:27:05,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 21:27:05,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 21:27:05,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 21:27:05,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 21:27:05,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 21:27:05,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 21:27:05,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 21:27:05,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 21:27:05,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 21:27:05,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 21:27:05,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 21:27:05,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 21:27:05,942 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 21:27:06,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 21:27:06,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 21:27:06,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 21:27:06,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 21:27:06,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 21:27:06,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label23.c [2020-10-14 21:27:06,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aab0031c1/5c9e75a0c3654cbc84927352203704eb/FLAGe156b4f31 [2020-10-14 21:27:07,253 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 21:27:07,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label23.c [2020-10-14 21:27:07,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aab0031c1/5c9e75a0c3654cbc84927352203704eb/FLAGe156b4f31 [2020-10-14 21:27:07,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aab0031c1/5c9e75a0c3654cbc84927352203704eb [2020-10-14 21:27:07,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 21:27:07,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 21:27:07,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 21:27:07,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 21:27:07,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 21:27:07,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:27:07" (1/1) ... [2020-10-14 21:27:07,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3250662d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:07, skipping insertion in model container [2020-10-14 21:27:07,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:27:07" (1/1) ... [2020-10-14 21:27:07,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 21:27:07,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 21:27:09,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:27:09,824 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 21:27:10,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 21:27:10,651 INFO L208 MainTranslator]: Completed translation [2020-10-14 21:27:10,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10 WrapperNode [2020-10-14 21:27:10,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 21:27:10,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 21:27:10,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 21:27:10,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 21:27:10,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (1/1) ... [2020-10-14 21:27:10,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (1/1) ... [2020-10-14 21:27:10,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (1/1) ... [2020-10-14 21:27:10,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (1/1) ... [2020-10-14 21:27:10,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (1/1) ... [2020-10-14 21:27:10,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (1/1) ... [2020-10-14 21:27:10,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (1/1) ... [2020-10-14 21:27:11,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 21:27:11,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 21:27:11,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 21:27:11,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 21:27:11,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (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 [2020-10-14 21:27:11,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 21:27:11,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 21:27:11,150 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-14 21:27:11,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-14 21:27:11,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-14 21:27:11,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-14 21:27:11,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 21:27:11,151 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-14 21:27:11,151 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-14 21:27:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-14 21:27:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-14 21:27:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 21:27:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 21:27:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 21:27:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 21:27:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 21:27:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 21:27:22,963 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 21:27:22,964 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 21:27:22,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:27:22 BoogieIcfgContainer [2020-10-14 21:27:22,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 21:27:22,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 21:27:22,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 21:27:22,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 21:27:22,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:27:07" (1/3) ... [2020-10-14 21:27:22,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0ea7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:27:22, skipping insertion in model container [2020-10-14 21:27:22,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:27:10" (2/3) ... [2020-10-14 21:27:22,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0ea7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:27:22, skipping insertion in model container [2020-10-14 21:27:22,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:27:22" (3/3) ... [2020-10-14 21:27:22,987 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label23.c [2020-10-14 21:27:23,002 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 21:27:23,014 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 21:27:23,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 21:27:23,059 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 21:27:23,059 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 21:27:23,059 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 21:27:23,059 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 21:27:23,060 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 21:27:23,060 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 21:27:23,060 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 21:27:23,060 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 21:27:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-14 21:27:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 21:27:23,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:27:23,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:27:23,107 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:27:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:27:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1437185016, now seen corresponding path program 1 times [2020-10-14 21:27:23,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:27:23,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100583107] [2020-10-14 21:27:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:27:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:23,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:23,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:23,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 21:27:23,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:23,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-14 21:27:23,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:23,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:23,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:27:23,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:27:23,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 21:27:23,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 21:27:23,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:27:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:23,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:23,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:23,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:27:23,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:23,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-14 21:27:23,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:23,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:27:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:27:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:27:23,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:27:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:27:23,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100583107] [2020-10-14 21:27:23,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:27:23,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 21:27:23,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585490937] [2020-10-14 21:27:23,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 21:27:23,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:27:23,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 21:27:23,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 21:27:23,790 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-14 21:27:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:27:39,152 INFO L93 Difference]: Finished difference Result 3243 states and 5948 transitions. [2020-10-14 21:27:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:27:39,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 21:27:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:27:39,195 INFO L225 Difference]: With dead ends: 3243 [2020-10-14 21:27:39,196 INFO L226 Difference]: Without dead ends: 2045 [2020-10-14 21:27:39,207 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 [2020-10-14 21:27:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2020-10-14 21:27:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1988. [2020-10-14 21:27:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2020-10-14 21:27:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3533 transitions. [2020-10-14 21:27:39,415 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3533 transitions. Word has length 19 [2020-10-14 21:27:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:27:39,417 INFO L479 AbstractCegarLoop]: Abstraction has 1988 states and 3533 transitions. [2020-10-14 21:27:39,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 21:27:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3533 transitions. [2020-10-14 21:27:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 21:27:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:27:39,426 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 21:27:39,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 21:27:39,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:27:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:27:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 173051777, now seen corresponding path program 1 times [2020-10-14 21:27:39,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:27:39,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186822363] [2020-10-14 21:27:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:27:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:39,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:40,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:40,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 21:27:40,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:27:40,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-14 21:27:40,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:40,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:40,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:27:40,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:27:40,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 21:27:40,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 21:27:40,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:27:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:40,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:40,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:40,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:27:40,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:40,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 21:27:40,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:40,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:40,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:27:40,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:27:40,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:27:40,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:27:40,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:27:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:27:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:27:40,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:27:40,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-14 21:27:40,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:27:40,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:27:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:27:40,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:27:40,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 21:27:40,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:27:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:27:40,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186822363] [2020-10-14 21:27:40,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:27:40,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:27:40,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731876287] [2020-10-14 21:27:40,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:27:40,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:27:40,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:27:40,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:27:40,952 INFO L87 Difference]: Start difference. First operand 1988 states and 3533 transitions. Second operand 7 states. [2020-10-14 21:27:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:27:59,696 INFO L93 Difference]: Finished difference Result 5733 states and 10344 transitions. [2020-10-14 21:27:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 21:27:59,697 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 88 [2020-10-14 21:27:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:27:59,733 INFO L225 Difference]: With dead ends: 5733 [2020-10-14 21:27:59,734 INFO L226 Difference]: Without dead ends: 3751 [2020-10-14 21:27:59,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:27:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2020-10-14 21:27:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3678. [2020-10-14 21:27:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3678 states. [2020-10-14 21:27:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 5734 transitions. [2020-10-14 21:27:59,910 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 5734 transitions. Word has length 88 [2020-10-14 21:27:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:27:59,911 INFO L479 AbstractCegarLoop]: Abstraction has 3678 states and 5734 transitions. [2020-10-14 21:27:59,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:27:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 5734 transitions. [2020-10-14 21:27:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 21:27:59,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:27:59,926 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 21:27:59,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 21:27:59,927 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:27:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:27:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash -205135347, now seen corresponding path program 1 times [2020-10-14 21:27:59,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:27:59,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081633437] [2020-10-14 21:27:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:27:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:00,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:01,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:01,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 21:28:01,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:28:01,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-14 21:28:01,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:01,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:01,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:28:01,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:28:01,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 21:28:01,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:01,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:28:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:01,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:01,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:01,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:28:01,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:01,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 21:28:01,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:01,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:28:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:28:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:28:01,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:01,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:28:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:01,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:01,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:01,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 21:28:01,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:01,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-14 21:28:01,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:01,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:28:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:28:01,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 21:28:01,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:28:01,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081633437] [2020-10-14 21:28:01,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:28:01,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:28:01,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833597792] [2020-10-14 21:28:01,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:28:01,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:28:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:28:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:28:01,789 INFO L87 Difference]: Start difference. First operand 3678 states and 5734 transitions. Second operand 7 states. [2020-10-14 21:28:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:28:29,690 INFO L93 Difference]: Finished difference Result 11067 states and 18109 transitions. [2020-10-14 21:28:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 21:28:29,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-14 21:28:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:28:29,747 INFO L225 Difference]: With dead ends: 11067 [2020-10-14 21:28:29,748 INFO L226 Difference]: Without dead ends: 7395 [2020-10-14 21:28:29,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-14 21:28:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7395 states. [2020-10-14 21:28:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7395 to 7205. [2020-10-14 21:28:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7205 states. [2020-10-14 21:28:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 10350 transitions. [2020-10-14 21:28:30,041 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 10350 transitions. Word has length 94 [2020-10-14 21:28:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:28:30,044 INFO L479 AbstractCegarLoop]: Abstraction has 7205 states and 10350 transitions. [2020-10-14 21:28:30,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:28:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 10350 transitions. [2020-10-14 21:28:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 21:28:30,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:28:30,055 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-14 21:28:30,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 21:28:30,055 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:28:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:28:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash 81466057, now seen corresponding path program 1 times [2020-10-14 21:28:30,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:28:30,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050132305] [2020-10-14 21:28:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:28:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:30,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:30,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:31,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:31,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 21:28:31,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:28:31,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-14 21:28:31,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:31,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:28:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:28:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-14 21:28:31,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:31,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:28:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:31,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:31,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:31,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:28:31,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:31,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 21:28:31,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:31,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:28:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:28:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:28:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:31,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:28:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:31,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:31,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:31,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 21:28:31,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:31,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-14 21:28:31,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:31,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:28:31,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:28:31,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 21:28:31,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:28:31,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050132305] [2020-10-14 21:28:31,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:28:31,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:28:31,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086861518] [2020-10-14 21:28:31,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:28:31,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:28:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:28:31,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:28:31,850 INFO L87 Difference]: Start difference. First operand 7205 states and 10350 transitions. Second operand 7 states. [2020-10-14 21:28:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:28:54,759 INFO L93 Difference]: Finished difference Result 15837 states and 23857 transitions. [2020-10-14 21:28:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:28:54,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-14 21:28:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:28:54,820 INFO L225 Difference]: With dead ends: 15837 [2020-10-14 21:28:54,820 INFO L226 Difference]: Without dead ends: 8638 [2020-10-14 21:28:54,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-14 21:28:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8638 states. [2020-10-14 21:28:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8638 to 8134. [2020-10-14 21:28:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8134 states. [2020-10-14 21:28:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8134 states to 8134 states and 11450 transitions. [2020-10-14 21:28:55,165 INFO L78 Accepts]: Start accepts. Automaton has 8134 states and 11450 transitions. Word has length 124 [2020-10-14 21:28:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:28:55,166 INFO L479 AbstractCegarLoop]: Abstraction has 8134 states and 11450 transitions. [2020-10-14 21:28:55,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:28:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 8134 states and 11450 transitions. [2020-10-14 21:28:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 21:28:55,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:28:55,169 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:28:55,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 21:28:55,170 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:28:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:28:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1226275037, now seen corresponding path program 1 times [2020-10-14 21:28:55,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:28:55,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101252442] [2020-10-14 21:28:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:28:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:55,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:56,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:56,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 21:28:56,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:28:56,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-14 21:28:56,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:56,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:56,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 21:28:56,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:28:56,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 21:28:56,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 93 [2020-10-14 21:28:56,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:28:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:56,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:56,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:28:56,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:56,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 21:28:56,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:56,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:56,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:28:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:28:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:28:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:56,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:28:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:28:56,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:28:57,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:28:57,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 21:28:57,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:28:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-14 21:28:57,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:28:57,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:28:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:28:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:28:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 21:28:57,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:28:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 21:28:57,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101252442] [2020-10-14 21:28:57,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 21:28:57,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 21:28:57,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110193360] [2020-10-14 21:28:57,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:28:57,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:28:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:28:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:28:57,243 INFO L87 Difference]: Start difference. First operand 8134 states and 11450 transitions. Second operand 7 states. [2020-10-14 21:29:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:29:22,184 INFO L93 Difference]: Finished difference Result 15823 states and 22713 transitions. [2020-10-14 21:29:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 21:29:22,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 134 [2020-10-14 21:29:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:29:22,245 INFO L225 Difference]: With dead ends: 15823 [2020-10-14 21:29:22,245 INFO L226 Difference]: Without dead ends: 8498 [2020-10-14 21:29:22,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-14 21:29:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2020-10-14 21:29:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 8129. [2020-10-14 21:29:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8129 states. [2020-10-14 21:29:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8129 states to 8129 states and 11364 transitions. [2020-10-14 21:29:22,587 INFO L78 Accepts]: Start accepts. Automaton has 8129 states and 11364 transitions. Word has length 134 [2020-10-14 21:29:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:29:22,588 INFO L479 AbstractCegarLoop]: Abstraction has 8129 states and 11364 transitions. [2020-10-14 21:29:22,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 21:29:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 8129 states and 11364 transitions. [2020-10-14 21:29:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 21:29:22,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:29:22,591 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 21:29:22,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 21:29:22,592 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:29:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:29:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 49177280, now seen corresponding path program 1 times [2020-10-14 21:29:22,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:29:22,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266607120] [2020-10-14 21:29:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:29:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:29:22,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:22,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:23,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:29:23,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 21:29:23,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:29:23,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-14 21:29:23,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:29:23,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:29:23,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:29:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:29:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-14 21:29:23,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:29:23,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:29:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:29:23,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:23,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:29:23,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:29:23,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:29:23,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 21:29:23,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:29:23,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:29:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:29:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:29:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:29:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:29:23,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:29:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:29:24,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:24,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:24,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:29:24,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:29:24,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:29:24,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-14 21:29:24,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:29:24,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:29:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:29:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:29:24,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 21:29:24,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:29:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 21:29:24,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266607120] [2020-10-14 21:29:24,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:29:24,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 21:29:24,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917749286] [2020-10-14 21:29:24,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 21:29:24,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:29:24,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 21:29:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 21:29:24,373 INFO L87 Difference]: Start difference. First operand 8129 states and 11364 transitions. Second operand 6 states. [2020-10-14 21:29:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:29:52,598 INFO L93 Difference]: Finished difference Result 22195 states and 32744 transitions. [2020-10-14 21:29:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 21:29:52,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2020-10-14 21:29:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:29:52,666 INFO L225 Difference]: With dead ends: 22195 [2020-10-14 21:29:52,667 INFO L226 Difference]: Without dead ends: 14875 [2020-10-14 21:29:52,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:29:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14875 states. [2020-10-14 21:29:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14875 to 14835. [2020-10-14 21:29:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14835 states. [2020-10-14 21:29:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14835 states to 14835 states and 19529 transitions. [2020-10-14 21:29:53,116 INFO L78 Accepts]: Start accepts. Automaton has 14835 states and 19529 transitions. Word has length 148 [2020-10-14 21:29:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:29:53,117 INFO L479 AbstractCegarLoop]: Abstraction has 14835 states and 19529 transitions. [2020-10-14 21:29:53,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 21:29:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 14835 states and 19529 transitions. [2020-10-14 21:29:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-14 21:29:53,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:29:53,123 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:29:53,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 21:29:53,124 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:29:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:29:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash 483808046, now seen corresponding path program 1 times [2020-10-14 21:29:53,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:29:53,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040274614] [2020-10-14 21:29:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:29:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:29:53,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:53,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:55,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:55,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:58,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:29:58,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-14 21:29:58,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 21:29:58,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 21:29:58,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:29:58,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:29:58,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 21:29:58,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:29:58,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-14 21:29:58,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:29:58,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:29:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:29:58,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:58,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:29:58,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:29:58,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:29:58,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 21:29:58,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:29:58,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:29:58,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:29:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:29:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:29:58,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:29:58,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:29:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:29:58,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:58,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:29:58,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 21:29:58,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:29:58,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-14 21:29:58,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:29:58,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:29:58,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:29:58,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:29:58,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 21:29:58,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:29:58,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-14 21:29:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:29:58,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:59,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:29:59,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:29:59,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 21:29:59,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:29:59,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-14 21:29:59,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:29:59,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:29:59,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 21:29:59,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-14 21:29:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 21:29:59,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:29:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 21:29:59,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040274614] [2020-10-14 21:29:59,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:29:59,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:29:59,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030963531] [2020-10-14 21:29:59,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 21:29:59,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:29:59,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 21:29:59,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-14 21:29:59,670 INFO L87 Difference]: Start difference. First operand 14835 states and 19529 transitions. Second operand 8 states. [2020-10-14 21:30:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 21:30:37,472 INFO L93 Difference]: Finished difference Result 34322 states and 45802 transitions. [2020-10-14 21:30:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 21:30:37,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 239 [2020-10-14 21:30:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 21:30:37,554 INFO L225 Difference]: With dead ends: 34322 [2020-10-14 21:30:37,555 INFO L226 Difference]: Without dead ends: 20296 [2020-10-14 21:30:37,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-14 21:30:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20296 states. [2020-10-14 21:30:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20296 to 20127. [2020-10-14 21:30:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20127 states. [2020-10-14 21:30:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20127 states to 20127 states and 25984 transitions. [2020-10-14 21:30:39,154 INFO L78 Accepts]: Start accepts. Automaton has 20127 states and 25984 transitions. Word has length 239 [2020-10-14 21:30:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 21:30:39,155 INFO L479 AbstractCegarLoop]: Abstraction has 20127 states and 25984 transitions. [2020-10-14 21:30:39,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 21:30:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20127 states and 25984 transitions. [2020-10-14 21:30:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-14 21:30:39,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 21:30:39,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-14 21:30:39,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 21:30:39,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 21:30:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 21:30:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash 533865465, now seen corresponding path program 1 times [2020-10-14 21:30:39,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 21:30:39,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118711742] [2020-10-14 21:30:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 21:30:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:30:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:39,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:39,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:40,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:41,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:41,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:30:41,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-14 21:30:41,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 21:30:41,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2094 [2020-10-14 21:30:41,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:30:41,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:30:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 21:30:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 21:30:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 247 [2020-10-14 21:30:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 21:30:41,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 21:30:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:30:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:41,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:30:41,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 21:30:41,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 21:30:41,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 21:30:41,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:30:41,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:30:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:30:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:30:41,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 21:30:41,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:30:41,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-14 21:30:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:30:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:41,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:30:41,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 21:30:41,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:30:41,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-14 21:30:41,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:30:41,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:30:41,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:30:41,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:30:41,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 21:30:41,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 21:30:41,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-14 21:30:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 21:30:41,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:42,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 21:30:42,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 21:30:42,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 21:30:42,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 21:30:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-14 21:30:42,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 21:30:42,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 21:30:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 21:30:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 21:30:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 21:30:42,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 21:30:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-14 21:30:42,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118711742] [2020-10-14 21:30:42,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 21:30:42,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 21:30:42,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647226960] [2020-10-14 21:30:42,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 21:30:42,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 21:30:42,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 21:30:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 21:30:42,513 INFO L87 Difference]: Start difference. First operand 20127 states and 25984 transitions. Second operand 7 states.