/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:20:21,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:20:21,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:20:21,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:20:21,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:20:21,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:20:21,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:20:21,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:20:21,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:20:21,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:20:21,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:20:21,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:20:21,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:20:21,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:20:21,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:20:21,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:20:21,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:20:21,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:20:21,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:20:22,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:20:22,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:20:22,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:20:22,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:20:22,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:20:22,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:20:22,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:20:22,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:20:22,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:20:22,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:20:22,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:20:22,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:20:22,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:20:22,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:20:22,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:20:22,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:20:22,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:20:22,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:20:22,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:20:22,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:20:22,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:20:22,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:20:22,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:20:22,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:20:22,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:20:22,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:20:22,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:20:22,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:20:22,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:20:22,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:20:22,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:20:22,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:20:22,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:20:22,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:20:22,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:20:22,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:20:22,076 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:20:22,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:20:22,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:20:22,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:20:22,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:20:22,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:20:22,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:20:22,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:20:22,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:20:22,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:20:22,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:20:22,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:20:22,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:20:22,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:20:22,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:20:22,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:20:22,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:20:22,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:20:22,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:20:22,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:20:22,425 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:20:22,427 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:20:22,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label36.c [2020-10-12 15:20:22,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4105d9bbc/3938afa1bd1346078d2b65a2f39faed3/FLAG1e47f1bc0 [2020-10-12 15:20:23,480 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:20:23,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label36.c [2020-10-12 15:20:23,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4105d9bbc/3938afa1bd1346078d2b65a2f39faed3/FLAG1e47f1bc0 [2020-10-12 15:20:23,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4105d9bbc/3938afa1bd1346078d2b65a2f39faed3 [2020-10-12 15:20:23,899 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:20:23,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:20:23,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:20:23,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:20:23,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:20:23,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:20:23" (1/1) ... [2020-10-12 15:20:23,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7438b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:23, skipping insertion in model container [2020-10-12 15:20:23,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:20:23" (1/1) ... [2020-10-12 15:20:23,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:20:24,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:20:26,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:20:26,716 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:20:27,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:20:27,848 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:20:27,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27 WrapperNode [2020-10-12 15:20:27,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:20:27,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:20:27,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:20:27,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:20:27,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... [2020-10-12 15:20:27,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... [2020-10-12 15:20:27,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... [2020-10-12 15:20:27,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... [2020-10-12 15:20:28,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... [2020-10-12 15:20:28,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... [2020-10-12 15:20:28,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... [2020-10-12 15:20:28,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:20:28,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:20:28,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:20:28,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:20:28,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:20:28,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:20:28,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:20:28,549 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 15:20:28,549 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 15:20:28,550 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 15:20:28,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 15:20:28,551 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-12 15:20:28,552 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-12 15:20:28,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:20:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 15:20:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 15:20:28,553 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 15:20:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 15:20:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-12 15:20:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-12 15:20:28,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:20:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:20:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:20:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:20:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:20:28,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:20:43,071 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:20:43,071 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 15:20:43,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:20:43 BoogieIcfgContainer [2020-10-12 15:20:43,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:20:43,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:20:43,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:20:43,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:20:43,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:20:23" (1/3) ... [2020-10-12 15:20:43,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca015a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:20:43, skipping insertion in model container [2020-10-12 15:20:43,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:20:27" (2/3) ... [2020-10-12 15:20:43,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca015a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:20:43, skipping insertion in model container [2020-10-12 15:20:43,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:20:43" (3/3) ... [2020-10-12 15:20:43,103 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label36.c [2020-10-12 15:20:43,113 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:20:43,125 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:20:43,142 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:20:43,172 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:20:43,172 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:20:43,172 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:20:43,173 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:20:43,173 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:20:43,173 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:20:43,173 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:20:43,173 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:20:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-12 15:20:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:20:43,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:20:43,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:20:43,238 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:20:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:20:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1019367100, now seen corresponding path program 1 times [2020-10-12 15:20:43,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:20:43,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127558874] [2020-10-12 15:20:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:20:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:20:43,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:20:43,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:20:43,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:20:43,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:20:43,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-12 15:20:43,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:20:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:20:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:20:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:20:43,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:20:44,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:20:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:20:44,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:20:44,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:20:44,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:20:44,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:20:44,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 15:20:44,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:20:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:20:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:20:44,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:20:44,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:20:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:20:44,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127558874] [2020-10-12 15:20:44,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:20:44,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:20:44,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985665752] [2020-10-12 15:20:44,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:20:44,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:20:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:20:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:20:44,221 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-12 15:21:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:21:25,398 INFO L93 Difference]: Finished difference Result 6572 states and 12481 transitions. [2020-10-12 15:21:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:21:25,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-12 15:21:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:21:25,463 INFO L225 Difference]: With dead ends: 6572 [2020-10-12 15:21:25,463 INFO L226 Difference]: Without dead ends: 4727 [2020-10-12 15:21:25,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:21:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2020-10-12 15:21:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4640. [2020-10-12 15:21:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4640 states. [2020-10-12 15:21:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 7457 transitions. [2020-10-12 15:21:25,852 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 7457 transitions. Word has length 39 [2020-10-12 15:21:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:21:25,853 INFO L479 AbstractCegarLoop]: Abstraction has 4640 states and 7457 transitions. [2020-10-12 15:21:25,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:21:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 7457 transitions. [2020-10-12 15:21:25,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 15:21:25,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:21:25,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:21:25,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:21:25,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:21:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:21:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1493025618, now seen corresponding path program 1 times [2020-10-12 15:21:25,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:21:25,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985323165] [2020-10-12 15:21:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:21:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:21:25,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:21:26,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:21:27,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:21:27,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:21:27,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 15:21:27,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:21:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1445 [2020-10-12 15:21:27,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:21:27,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:21:27,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:21:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 15:21:27,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 15:21:27,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:21:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:21:27,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:21:27,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:21:27,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:21:27,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:21:27,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 15:21:27,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:21:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:21:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:21:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:21:27,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:21:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:21:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:21:27,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:21:27,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:21:27,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:21:27,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:21:27,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:21:27,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-12 15:21:27,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:21:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:21:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:21:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 15:21:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:21:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:21:28,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985323165] [2020-10-12 15:21:28,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:21:28,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:21:28,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354071491] [2020-10-12 15:21:28,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:21:28,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:21:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:21:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:21:28,142 INFO L87 Difference]: Start difference. First operand 4640 states and 7457 transitions. Second operand 7 states. [2020-10-12 15:22:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:22:22,111 INFO L93 Difference]: Finished difference Result 17910 states and 29632 transitions. [2020-10-12 15:22:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:22:22,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-12 15:22:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:22:22,194 INFO L225 Difference]: With dead ends: 17910 [2020-10-12 15:22:22,194 INFO L226 Difference]: Without dead ends: 13276 [2020-10-12 15:22:22,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:22:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13276 states. [2020-10-12 15:22:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13276 to 13214. [2020-10-12 15:22:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13214 states. [2020-10-12 15:22:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 19841 transitions. [2020-10-12 15:22:22,653 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 19841 transitions. Word has length 114 [2020-10-12 15:22:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:22:22,653 INFO L479 AbstractCegarLoop]: Abstraction has 13214 states and 19841 transitions. [2020-10-12 15:22:22,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:22:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 19841 transitions. [2020-10-12 15:22:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 15:22:22,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:22:22,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:22:22,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:22:22,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:22:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:22:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1243874453, now seen corresponding path program 1 times [2020-10-12 15:22:22,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:22:22,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004376739] [2020-10-12 15:22:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:22:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:22,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:22,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:23,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:24,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:24,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-12 15:22:24,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:22:24,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1299 [2020-10-12 15:22:24,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:24,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:22:24,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:22:24,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-12 15:22:24,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:22:24,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:22:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:24,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:24,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:24,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:22:24,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:22:24,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:22:24,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:24,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:22:24,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:22:24,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:22:24,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:22:24,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:22:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:22:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:24,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:22:24,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:22:24,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 15:22:24,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:22:24,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-12 15:22:24,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:22:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:22:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:22:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-12 15:22:24,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:22:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:22:24,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004376739] [2020-10-12 15:22:24,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:22:24,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 15:22:24,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504823039] [2020-10-12 15:22:24,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:22:24,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:22:24,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:22:24,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:22:24,561 INFO L87 Difference]: Start difference. First operand 13214 states and 19841 transitions. Second operand 6 states. [2020-10-12 15:23:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:23:13,768 INFO L93 Difference]: Finished difference Result 39626 states and 62021 transitions. [2020-10-12 15:23:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:23:13,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2020-10-12 15:23:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:23:13,888 INFO L225 Difference]: With dead ends: 39626 [2020-10-12 15:23:13,889 INFO L226 Difference]: Without dead ends: 26418 [2020-10-12 15:23:13,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:23:13,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26418 states. [2020-10-12 15:23:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26418 to 26336. [2020-10-12 15:23:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26336 states. [2020-10-12 15:23:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26336 states to 26336 states and 36871 transitions. [2020-10-12 15:23:14,595 INFO L78 Accepts]: Start accepts. Automaton has 26336 states and 36871 transitions. Word has length 166 [2020-10-12 15:23:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:23:14,598 INFO L479 AbstractCegarLoop]: Abstraction has 26336 states and 36871 transitions. [2020-10-12 15:23:14,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:23:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 26336 states and 36871 transitions. [2020-10-12 15:23:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-12 15:23:14,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:23:14,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 15:23:14,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:23:14,611 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:23:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:23:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash 325112804, now seen corresponding path program 1 times [2020-10-12 15:23:14,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:23:14,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607403933] [2020-10-12 15:23:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:23:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:14,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:14,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:14,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:16,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:16,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:19,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:19,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-12 15:23:19,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:23:19,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 15:23:19,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:23:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:23:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-12 15:23:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:19,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:23:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:19,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:19,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:19,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:23:19,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:23:19,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:23:19,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:23:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:23:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:23:19,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:19,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:23:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:19,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:19,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:19,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 15:23:19,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:23:19,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-12 15:23:19,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:19,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:23:19,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:23:19,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 15:23:19,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:20,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-12 15:23:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:23:20,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:23:20,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:23:20,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:23:20,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:23:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-12 15:23:20,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:23:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:23:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 15:23:20,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 15:23:20,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:23:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 15:23:20,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607403933] [2020-10-12 15:23:20,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:23:20,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:23:20,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760140738] [2020-10-12 15:23:20,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:23:20,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:23:20,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:23:20,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:23:20,402 INFO L87 Difference]: Start difference. First operand 26336 states and 36871 transitions. Second operand 8 states.