/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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:06:59,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:06:59,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:06:59,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:06:59,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:06:59,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:06:59,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:06:59,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:06:59,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:06:59,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:06:59,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:06:59,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:06:59,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:06:59,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:06:59,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:06:59,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:06:59,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:06:59,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:06:59,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:06:59,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:06:59,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:06:59,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:06:59,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:06:59,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:06:59,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:06:59,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:06:59,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:06:59,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:06:59,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:06:59,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:06:59,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:06:59,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:06:59,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:06:59,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:06:59,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:06:59,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:06:59,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:06:59,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:06:59,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:06:59,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:06:59,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:06:59,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:06:59,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:06:59,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:06:59,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:06:59,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:06:59,945 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:06:59,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:06:59,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:06:59,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:06:59,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:06:59,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:06:59,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:06:59,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:06:59,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:06:59,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:06:59,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:06:59,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:06:59,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:06:59,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:06:59,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:06:59,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:06:59,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:06:59,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:06:59,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:06:59,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:06:59,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:06:59,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:06:59,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:06:59,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:06:59,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:06:59,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:07:00,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:07:00,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:07:00,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:07:00,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:07:00,356 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:07:00,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2020-10-13 10:07:00,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b680f2686/91eddd90666e420a8b5b4fdbaf59ff90/FLAG3a444754a [2020-10-13 10:07:01,620 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:07:01,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2020-10-13 10:07:01,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b680f2686/91eddd90666e420a8b5b4fdbaf59ff90/FLAG3a444754a [2020-10-13 10:07:01,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b680f2686/91eddd90666e420a8b5b4fdbaf59ff90 [2020-10-13 10:07:01,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:07:01,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:07:01,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:07:01,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:07:01,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:07:01,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:07:01" (1/1) ... [2020-10-13 10:07:01,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44dc5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:01, skipping insertion in model container [2020-10-13 10:07:01,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:07:01" (1/1) ... [2020-10-13 10:07:01,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:07:02,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:07:04,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:07:04,947 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:07:06,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:07:06,471 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:07:06,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06 WrapperNode [2020-10-13 10:07:06,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:07:06,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:07:06,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:07:06,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:07:06,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... [2020-10-13 10:07:06,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... [2020-10-13 10:07:06,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... [2020-10-13 10:07:06,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... [2020-10-13 10:07:06,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... [2020-10-13 10:07:07,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... [2020-10-13 10:07:07,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... [2020-10-13 10:07:07,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:07:07,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:07:07,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:07:07,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:07:07,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:07:07,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:07:07,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:07:07,548 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:07:07,548 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:07:07,548 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:07:07,549 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:07:07,549 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:07:07,550 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:07:07,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:07:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:07:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:07:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:07:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:07:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:07:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:07:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:07:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:07:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:07:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:07:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:07:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:07:22,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:07:22,033 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:07:22,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:07:22 BoogieIcfgContainer [2020-10-13 10:07:22,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:07:22,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:07:22,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:07:22,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:07:22,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:07:01" (1/3) ... [2020-10-13 10:07:22,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ee2e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:07:22, skipping insertion in model container [2020-10-13 10:07:22,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:07:06" (2/3) ... [2020-10-13 10:07:22,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ee2e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:07:22, skipping insertion in model container [2020-10-13 10:07:22,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:07:22" (3/3) ... [2020-10-13 10:07:22,066 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label39.c [2020-10-13 10:07:22,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:07:22,092 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:07:22,109 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:07:22,150 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:07:22,150 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:07:22,150 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:07:22,151 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:07:22,151 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:07:22,151 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:07:22,151 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:07:22,151 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:07:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:07:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:07:22,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:07:22,219 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] [2020-10-13 10:07:22,220 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:07:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:07:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1475919748, now seen corresponding path program 1 times [2020-10-13 10:07:22,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:07:22,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222540885] [2020-10-13 10:07:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:07:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:22,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:23,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:23,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:07:23,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:23,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-13 10:07:23,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:07:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:07:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:07:23,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:07:23,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:07:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:23,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:23,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:23,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:07:23,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:23,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:07:23,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:07:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:07:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:07:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:07:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:07:23,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222540885] [2020-10-13 10:07:23,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:07:23,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:07:23,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311602914] [2020-10-13 10:07:23,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:07:23,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:07:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:07:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:07:23,270 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-13 10:07:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:07:51,243 INFO L93 Difference]: Finished difference Result 5087 states and 9562 transitions. [2020-10-13 10:07:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:07:51,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-13 10:07:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:07:51,304 INFO L225 Difference]: With dead ends: 5087 [2020-10-13 10:07:51,305 INFO L226 Difference]: Without dead ends: 3246 [2020-10-13 10:07:51,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:07:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-13 10:07:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-13 10:07:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-13 10:07:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-13 10:07:51,554 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 37 [2020-10-13 10:07:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:07:51,555 INFO L479 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-13 10:07:51,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:07:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-13 10:07:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 10:07:51,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:07:51,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:07:51,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:07:51,562 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:07:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:07:51,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1086088176, now seen corresponding path program 1 times [2020-10-13 10:07:51,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:07:51,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932069828] [2020-10-13 10:07:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:07:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:51,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:51,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:51,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:52,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:52,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 10:07:52,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:07:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-13 10:07:52,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:07:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 10:07:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:07:52,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:07:52,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:07:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:52,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:52,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:07:52,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:07:52,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:07:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:07:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:07:52,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:07:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:07:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:07:52,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:07:52,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:07:52,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:07:52,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:07:52,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 10:07:52,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:07:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:07:52,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:07:52,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:07:52,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:07:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:07:52,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932069828] [2020-10-13 10:07:52,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:07:52,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:07:52,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516520825] [2020-10-13 10:07:52,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:07:52,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:07:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:07:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:07:52,843 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 5 states. [2020-10-13 10:08:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:08:32,372 INFO L93 Difference]: Finished difference Result 9273 states and 17286 transitions. [2020-10-13 10:08:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:08:32,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 10:08:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:08:32,419 INFO L225 Difference]: With dead ends: 9273 [2020-10-13 10:08:32,420 INFO L226 Difference]: Without dead ends: 6100 [2020-10-13 10:08:32,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:08:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2020-10-13 10:08:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 6034. [2020-10-13 10:08:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6034 states. [2020-10-13 10:08:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 10314 transitions. [2020-10-13 10:08:32,699 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 10314 transitions. Word has length 108 [2020-10-13 10:08:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:08:32,700 INFO L479 AbstractCegarLoop]: Abstraction has 6034 states and 10314 transitions. [2020-10-13 10:08:32,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:08:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 10314 transitions. [2020-10-13 10:08:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 10:08:32,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:08:32,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:08:32,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:08:32,718 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:08:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:08:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1714040760, now seen corresponding path program 1 times [2020-10-13 10:08:32,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:08:32,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043453891] [2020-10-13 10:08:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:08:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:33,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:34,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:34,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 10:08:34,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:08:34,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1413 [2020-10-13 10:08:34,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:08:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:08:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:08:34,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:34,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:08:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:34,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:34,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:34,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:08:34,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:34,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:08:34,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:08:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:08:34,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:08:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:08:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:08:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:08:34,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:08:34,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:08:34,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:08:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-13 10:08:34,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:08:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:08:34,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:08:34,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:08:34,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:08:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:08:34,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043453891] [2020-10-13 10:08:34,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:08:34,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:08:34,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101209878] [2020-10-13 10:08:34,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:08:34,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:08:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:08:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:08:34,626 INFO L87 Difference]: Start difference. First operand 6034 states and 10314 transitions. Second operand 5 states. [2020-10-13 10:09:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:09:21,334 INFO L93 Difference]: Finished difference Result 16311 states and 27878 transitions. [2020-10-13 10:09:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:09:21,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2020-10-13 10:09:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:09:21,406 INFO L225 Difference]: With dead ends: 16311 [2020-10-13 10:09:21,406 INFO L226 Difference]: Without dead ends: 10283 [2020-10-13 10:09:21,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:09:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10283 states. [2020-10-13 10:09:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10283 to 10277. [2020-10-13 10:09:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10277 states. [2020-10-13 10:09:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 15360 transitions. [2020-10-13 10:09:21,730 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 15360 transitions. Word has length 113 [2020-10-13 10:09:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:09:21,732 INFO L479 AbstractCegarLoop]: Abstraction has 10277 states and 15360 transitions. [2020-10-13 10:09:21,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:09:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 15360 transitions. [2020-10-13 10:09:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 10:09:21,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:09:21,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:21,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:09:21,739 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:09:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:09:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash -377868454, now seen corresponding path program 1 times [2020-10-13 10:09:21,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:09:21,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119804151] [2020-10-13 10:09:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:09:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:22,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:23,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:23,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 10:09:23,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:09:23,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1798 [2020-10-13 10:09:23,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:23,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:09:23,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-13 10:09:23,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:09:23,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 10:09:23,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:09:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:23,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:23,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:23,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:09:23,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:23,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:09:23,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:23,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:09:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:09:23,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:09:23,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:09:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:09:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:09:24,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:09:24,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:09:24,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:09:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-13 10:09:24,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:09:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:09:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:09:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 10:09:24,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:09:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:09:24,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119804151] [2020-10-13 10:09:24,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:09:24,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:09:24,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741951950] [2020-10-13 10:09:24,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:09:24,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:09:24,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:09:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:09:24,222 INFO L87 Difference]: Start difference. First operand 10277 states and 15360 transitions. Second operand 5 states. [2020-10-13 10:10:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:06,317 INFO L93 Difference]: Finished difference Result 20597 states and 30801 transitions. [2020-10-13 10:10:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:06,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-10-13 10:10:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:06,361 INFO L225 Difference]: With dead ends: 20597 [2020-10-13 10:10:06,361 INFO L226 Difference]: Without dead ends: 10281 [2020-10-13 10:10:06,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 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 10:10:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10281 states. [2020-10-13 10:10:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10281 to 10277. [2020-10-13 10:10:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10277 states. [2020-10-13 10:10:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 15308 transitions. [2020-10-13 10:10:06,625 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 15308 transitions. Word has length 139 [2020-10-13 10:10:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:06,626 INFO L479 AbstractCegarLoop]: Abstraction has 10277 states and 15308 transitions. [2020-10-13 10:10:06,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:10:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 15308 transitions. [2020-10-13 10:10:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 10:10:06,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:06,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:06,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:10:06,634 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1607700426, now seen corresponding path program 1 times [2020-10-13 10:10:06,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:06,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853601616] [2020-10-13 10:10:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:06,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:08,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:08,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 10:10:08,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:10:08,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1538 [2020-10-13 10:10:08,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:10:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-13 10:10:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:10:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:08,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:08,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:08,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:08,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:08,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:08,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:10:08,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:08,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:08,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:08,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:08,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:08,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:08,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:10:08,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:08,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 10:10:08,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 10:10:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:08,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853601616] [2020-10-13 10:10:08,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:10:08,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:10:08,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992165337] [2020-10-13 10:10:08,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:10:08,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:08,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:10:08,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:08,750 INFO L87 Difference]: Start difference. First operand 10277 states and 15308 transitions. Second operand 5 states. [2020-10-13 10:10:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:47,628 INFO L93 Difference]: Finished difference Result 20597 states and 30712 transitions. [2020-10-13 10:10:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:47,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-13 10:10:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:47,672 INFO L225 Difference]: With dead ends: 20597 [2020-10-13 10:10:47,673 INFO L226 Difference]: Without dead ends: 10281 [2020-10-13 10:10:47,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 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 10:10:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10281 states. [2020-10-13 10:10:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10281 to 10277. [2020-10-13 10:10:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10277 states. [2020-10-13 10:10:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 14755 transitions. [2020-10-13 10:10:47,921 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 14755 transitions. Word has length 153 [2020-10-13 10:10:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:47,921 INFO L479 AbstractCegarLoop]: Abstraction has 10277 states and 14755 transitions. [2020-10-13 10:10:47,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:10:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 14755 transitions. [2020-10-13 10:10:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 10:10:47,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:47,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:47,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:10:47,928 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1539487180, now seen corresponding path program 1 times [2020-10-13 10:10:47,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:47,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581370235] [2020-10-13 10:10:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:48,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:48,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:48,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 10:10:48,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:10:48,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-13 10:10:48,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:10:48,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-13 10:10:48,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:10:48,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:48,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:48,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:48,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:48,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:48,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:10:48,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:48,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:48,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:48,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:10:48,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:49,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:49,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 10:10:49,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:49,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 10:10:49,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:49,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:49,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:49,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 10:10:49,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:49,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581370235] [2020-10-13 10:10:49,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:10:49,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:10:49,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116608803] [2020-10-13 10:10:49,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:10:49,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:10:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:10:49,239 INFO L87 Difference]: Start difference. First operand 10277 states and 14755 transitions. Second operand 6 states.