/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:39:06,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:39:06,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:39:06,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:39:06,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:39:06,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:39:06,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:39:06,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:39:06,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:39:06,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:39:06,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:39:06,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:39:06,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:39:06,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:39:06,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:39:06,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:39:06,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:39:06,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:39:06,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:39:06,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:39:06,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:39:06,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:39:06,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:39:06,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:39:06,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:39:06,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:39:06,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:39:06,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:39:06,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:39:06,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:39:06,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:39:06,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:39:06,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:39:06,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:39:06,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:39:06,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:39:06,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:39:06,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:39:06,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:39:06,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:39:06,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:39:06,981 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 [2020-10-15 03:39:07,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:39:07,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:39:07,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:39:07,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:39:07,022 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:39:07,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:39:07,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:39:07,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:39:07,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:39:07,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:39:07,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:39:07,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:39:07,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:39:07,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:39:07,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:39:07,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:39:07,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:39:07,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:39:07,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:39:07,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:39:07,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:39:07,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:39:07,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:39:07,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:39:07,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:39:07,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:39:07,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:39:07,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:39:07,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:39:07,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:39:07,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:39:07,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:39:07,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:39:07,347 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:39:07,348 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:39:07,349 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:39:07,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51fa34cd8/0dca3bafc2fc4d848cb468ab732df638/FLAG35e94560f [2020-10-15 03:39:07,907 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:39:07,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:39:07,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51fa34cd8/0dca3bafc2fc4d848cb468ab732df638/FLAG35e94560f [2020-10-15 03:39:08,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51fa34cd8/0dca3bafc2fc4d848cb468ab732df638 [2020-10-15 03:39:08,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:39:08,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:39:08,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:39:08,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:39:08,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:39:08,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fef75e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08, skipping insertion in model container [2020-10-15 03:39:08,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:39:08,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:39:08,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:39:08,575 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:39:08,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:39:08,751 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:39:08,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08 WrapperNode [2020-10-15 03:39:08,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:39:08,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:39:08,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:39:08,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:39:08,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (1/1) ... [2020-10-15 03:39:08,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:39:08,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:39:08,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:39:08,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:39:08,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (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 [2020-10-15 03:39:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:39:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:39:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:39:08,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:39:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:39:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:39:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:39:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:39:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:39:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:39:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:39:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:39:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:39:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:39:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:39:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:39:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:39:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:39:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:39:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:39:09,400 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:39:09,401 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:39:09,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:39:09 BoogieIcfgContainer [2020-10-15 03:39:09,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:39:09,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:39:09,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:39:09,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:39:09,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:39:08" (1/3) ... [2020-10-15 03:39:09,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7036f87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:39:09, skipping insertion in model container [2020-10-15 03:39:09,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:39:08" (2/3) ... [2020-10-15 03:39:09,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7036f87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:39:09, skipping insertion in model container [2020-10-15 03:39:09,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:39:09" (3/3) ... [2020-10-15 03:39:09,415 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-15 03:39:09,426 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:39:09,434 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:39:09,449 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:39:09,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:39:09,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:39:09,477 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:39:09,477 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:39:09,477 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:39:09,478 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:39:09,478 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:39:09,478 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:39:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-10-15 03:39:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 03:39:09,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:09,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:09,516 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash 665769091, now seen corresponding path program 1 times [2020-10-15 03:39:09,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:09,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113290194] [2020-10-15 03:39:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:09,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:10,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:10,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:10,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:10,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 03:39:10,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:39:10,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-15 03:39:10,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:10,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:10,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:39:10,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:39:10,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 03:39:10,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:39:10,999 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:39:11,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:11,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:11,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:11,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:11,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:11,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:39:11,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:11,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:11,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:11,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113290194] [2020-10-15 03:39:11,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:11,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:39:11,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983847029] [2020-10-15 03:39:11,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:39:11,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:39:11,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:11,084 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 6 states. [2020-10-15 03:39:11,262 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-15 03:39:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:11,690 INFO L93 Difference]: Finished difference Result 329 states and 517 transitions. [2020-10-15 03:39:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:39:11,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-15 03:39:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:11,709 INFO L225 Difference]: With dead ends: 329 [2020-10-15 03:39:11,709 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 03:39:11,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:39:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 03:39:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 136. [2020-10-15 03:39:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 03:39:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 201 transitions. [2020-10-15 03:39:11,776 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 201 transitions. Word has length 41 [2020-10-15 03:39:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:11,776 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 201 transitions. [2020-10-15 03:39:11,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:39:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 201 transitions. [2020-10-15 03:39:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 03:39:11,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:11,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:11,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:39:11,780 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash -854527449, now seen corresponding path program 1 times [2020-10-15 03:39:11,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:11,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003384256] [2020-10-15 03:39:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:12,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:12,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 03:39:12,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:39:12,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-15 03:39:12,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:12,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:12,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:12,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-15 03:39:12,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 03:39:12,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:12,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:12,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:12,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:12,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:12,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:12,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:39:12,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:12,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:12,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:12,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003384256] [2020-10-15 03:39:12,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:12,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:39:12,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485774800] [2020-10-15 03:39:12,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:39:12,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:12,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:39:12,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:39:12,472 INFO L87 Difference]: Start difference. First operand 136 states and 201 transitions. Second operand 4 states. [2020-10-15 03:39:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:12,919 INFO L93 Difference]: Finished difference Result 328 states and 503 transitions. [2020-10-15 03:39:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:39:12,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-15 03:39:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:12,922 INFO L225 Difference]: With dead ends: 328 [2020-10-15 03:39:12,922 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 03:39:12,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:39:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 03:39:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-10-15 03:39:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-15 03:39:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 323 transitions. [2020-10-15 03:39:12,948 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 323 transitions. Word has length 42 [2020-10-15 03:39:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:12,949 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 323 transitions. [2020-10-15 03:39:12,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:39:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 323 transitions. [2020-10-15 03:39:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 03:39:12,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:12,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:12,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:39:12,952 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:12,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1432014304, now seen corresponding path program 1 times [2020-10-15 03:39:12,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:12,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809219811] [2020-10-15 03:39:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:12,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:13,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:13,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:13,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 03:39:13,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:39:13,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-15 03:39:13,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:13,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:13,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:13,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-15 03:39:13,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 03:39:13,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:13,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:13,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:13,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:13,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:13,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:13,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:39:13,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:13,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:13,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:13,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:13,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:13,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809219811] [2020-10-15 03:39:13,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:13,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:39:13,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715471700] [2020-10-15 03:39:13,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:39:13,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:39:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:39:13,419 INFO L87 Difference]: Start difference. First operand 214 states and 323 transitions. Second operand 4 states. [2020-10-15 03:39:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:13,882 INFO L93 Difference]: Finished difference Result 530 states and 817 transitions. [2020-10-15 03:39:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:39:13,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-15 03:39:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:13,886 INFO L225 Difference]: With dead ends: 530 [2020-10-15 03:39:13,886 INFO L226 Difference]: Without dead ends: 340 [2020-10-15 03:39:13,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:39:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-15 03:39:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 338. [2020-10-15 03:39:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 03:39:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 513 transitions. [2020-10-15 03:39:13,915 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 513 transitions. Word has length 43 [2020-10-15 03:39:13,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:13,916 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 513 transitions. [2020-10-15 03:39:13,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:39:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 513 transitions. [2020-10-15 03:39:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:39:13,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:13,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:13,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:39:13,919 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1490511330, now seen corresponding path program 1 times [2020-10-15 03:39:13,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:13,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721284981] [2020-10-15 03:39:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:13,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:14,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:14,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:39:14,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:39:14,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-15 03:39:14,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:14,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:14,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:39:14,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:39:14,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 03:39:14,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 23 [2020-10-15 03:39:14,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:14,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:14,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:14,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:14,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:39:14,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:14,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:14,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:14,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:14,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:14,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721284981] [2020-10-15 03:39:14,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:14,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:39:14,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915275052] [2020-10-15 03:39:14,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:39:14,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:14,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:39:14,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:14,490 INFO L87 Difference]: Start difference. First operand 338 states and 513 transitions. Second operand 6 states. [2020-10-15 03:39:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:14,962 INFO L93 Difference]: Finished difference Result 1168 states and 1796 transitions. [2020-10-15 03:39:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:39:14,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-15 03:39:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:14,968 INFO L225 Difference]: With dead ends: 1168 [2020-10-15 03:39:14,968 INFO L226 Difference]: Without dead ends: 854 [2020-10-15 03:39:14,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2020-10-15 03:39:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 850. [2020-10-15 03:39:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-10-15 03:39:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1297 transitions. [2020-10-15 03:39:15,024 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1297 transitions. Word has length 44 [2020-10-15 03:39:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:15,024 INFO L479 AbstractCegarLoop]: Abstraction has 850 states and 1297 transitions. [2020-10-15 03:39:15,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:39:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1297 transitions. [2020-10-15 03:39:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 03:39:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:15,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:15,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:39:15,028 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 892271261, now seen corresponding path program 1 times [2020-10-15 03:39:15,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:15,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682618828] [2020-10-15 03:39:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:15,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:15,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:15,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 03:39:15,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:39:15,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-15 03:39:15,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:15,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:15,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:15,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 03:39:15,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 03:39:15,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:15,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:15,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:15,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:15,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:15,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:15,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-15 03:39:15,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:15,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:15,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:15,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682618828] [2020-10-15 03:39:15,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:15,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:39:15,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55074152] [2020-10-15 03:39:15,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:39:15,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:15,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:39:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:39:15,493 INFO L87 Difference]: Start difference. First operand 850 states and 1297 transitions. Second operand 4 states. [2020-10-15 03:39:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:16,105 INFO L93 Difference]: Finished difference Result 2238 states and 3411 transitions. [2020-10-15 03:39:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:39:16,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-15 03:39:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:16,117 INFO L225 Difference]: With dead ends: 2238 [2020-10-15 03:39:16,117 INFO L226 Difference]: Without dead ends: 1412 [2020-10-15 03:39:16,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:39:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2020-10-15 03:39:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1410. [2020-10-15 03:39:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1410 states. [2020-10-15 03:39:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2113 transitions. [2020-10-15 03:39:16,230 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2113 transitions. Word has length 44 [2020-10-15 03:39:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:16,232 INFO L479 AbstractCegarLoop]: Abstraction has 1410 states and 2113 transitions. [2020-10-15 03:39:16,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:39:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2113 transitions. [2020-10-15 03:39:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 03:39:16,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:16,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:16,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:39:16,237 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash -678329945, now seen corresponding path program 1 times [2020-10-15 03:39:16,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:16,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849070188] [2020-10-15 03:39:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:16,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:16,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:16,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:16,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 03:39:16,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:39:16,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-15 03:39:16,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:16,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:39:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:39:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 03:39:16,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 03:39:16,866 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:39:16,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:16,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:16,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:16,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:16,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:16,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-15 03:39:16,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:16,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:16,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:39:16,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 03:39:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:16,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849070188] [2020-10-15 03:39:16,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:16,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:39:16,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800979724] [2020-10-15 03:39:16,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:39:16,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:16,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:39:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:16,930 INFO L87 Difference]: Start difference. First operand 1410 states and 2113 transitions. Second operand 6 states. [2020-10-15 03:39:17,099 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-15 03:39:17,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:17,661 INFO L93 Difference]: Finished difference Result 4158 states and 6243 transitions. [2020-10-15 03:39:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:39:17,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-15 03:39:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:17,676 INFO L225 Difference]: With dead ends: 4158 [2020-10-15 03:39:17,676 INFO L226 Difference]: Without dead ends: 2772 [2020-10-15 03:39:17,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:39:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-10-15 03:39:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-10-15 03:39:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-10-15 03:39:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4129 transitions. [2020-10-15 03:39:17,873 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4129 transitions. Word has length 46 [2020-10-15 03:39:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:17,874 INFO L479 AbstractCegarLoop]: Abstraction has 2770 states and 4129 transitions. [2020-10-15 03:39:17,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:39:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4129 transitions. [2020-10-15 03:39:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 03:39:17,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:17,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:17,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:39:17,876 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:17,876 INFO L82 PathProgramCache]: Analyzing trace with hash -843887860, now seen corresponding path program 1 times [2020-10-15 03:39:17,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:17,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712616721] [2020-10-15 03:39:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:17,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:18,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:18,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 03:39:18,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:18,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-15 03:39:18,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:18,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:39:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-15 03:39:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:39:18,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:18,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:18,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:18,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:18,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:18,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:18,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:39:18,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:18,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:18,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712616721] [2020-10-15 03:39:18,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:18,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:39:18,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724653440] [2020-10-15 03:39:18,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:39:18,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:39:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:39:18,161 INFO L87 Difference]: Start difference. First operand 2770 states and 4129 transitions. Second operand 5 states. [2020-10-15 03:39:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:18,901 INFO L93 Difference]: Finished difference Result 5708 states and 8426 transitions. [2020-10-15 03:39:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:39:18,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-15 03:39:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:18,938 INFO L225 Difference]: With dead ends: 5708 [2020-10-15 03:39:18,939 INFO L226 Difference]: Without dead ends: 5706 [2020-10-15 03:39:18,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2020-10-15 03:39:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 2962. [2020-10-15 03:39:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2962 states. [2020-10-15 03:39:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4321 transitions. [2020-10-15 03:39:19,317 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4321 transitions. Word has length 46 [2020-10-15 03:39:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:19,318 INFO L479 AbstractCegarLoop]: Abstraction has 2962 states and 4321 transitions. [2020-10-15 03:39:19,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:39:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4321 transitions. [2020-10-15 03:39:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 03:39:19,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:19,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:39:19,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:39:19,320 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash -381100179, now seen corresponding path program 1 times [2020-10-15 03:39:19,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:19,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754773736] [2020-10-15 03:39:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:19,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:19,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:19,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 03:39:19,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:19,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-15 03:39:19,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:19,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:39:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 03:39:19,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:19,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:19,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:19,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:19,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:19,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:39:19,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:19,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:19,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:19,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754773736] [2020-10-15 03:39:19,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:39:19,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:39:19,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630518957] [2020-10-15 03:39:19,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:39:19,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:39:19,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:39:19,642 INFO L87 Difference]: Start difference. First operand 2962 states and 4321 transitions. Second operand 4 states. [2020-10-15 03:39:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:20,267 INFO L93 Difference]: Finished difference Result 7070 states and 10311 transitions. [2020-10-15 03:39:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:39:20,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-15 03:39:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:20,289 INFO L225 Difference]: With dead ends: 7070 [2020-10-15 03:39:20,289 INFO L226 Difference]: Without dead ends: 4132 [2020-10-15 03:39:20,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:39:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4132 states. [2020-10-15 03:39:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4132 to 4130. [2020-10-15 03:39:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4130 states. [2020-10-15 03:39:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5973 transitions. [2020-10-15 03:39:20,664 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5973 transitions. Word has length 47 [2020-10-15 03:39:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:20,665 INFO L479 AbstractCegarLoop]: Abstraction has 4130 states and 5973 transitions. [2020-10-15 03:39:20,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:39:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5973 transitions. [2020-10-15 03:39:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 03:39:20,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:20,668 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:39:20,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:39:20,669 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:20,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1351862416, now seen corresponding path program 1 times [2020-10-15 03:39:20,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:20,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482032449] [2020-10-15 03:39:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:20,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:20,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:20,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:22,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:22,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 03:39:22,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:39:22,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-15 03:39:22,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:22,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:39:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:39:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 03:39:22,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:22,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:22,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:22,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:22,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:22,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:22,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:39:22,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:22,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:22,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:22,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:22,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:22,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:39:22,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482032449] [2020-10-15 03:39:22,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:22,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 03:39:22,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197989401] [2020-10-15 03:39:22,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:39:22,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:39:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:39:22,513 INFO L87 Difference]: Start difference. First operand 4130 states and 5973 transitions. Second operand 5 states. [2020-10-15 03:39:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:23,347 INFO L93 Difference]: Finished difference Result 9784 states and 14216 transitions. [2020-10-15 03:39:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:39:23,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-15 03:39:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:23,383 INFO L225 Difference]: With dead ends: 9784 [2020-10-15 03:39:23,383 INFO L226 Difference]: Without dead ends: 6846 [2020-10-15 03:39:23,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2020-10-15 03:39:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6842. [2020-10-15 03:39:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6842 states. [2020-10-15 03:39:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 9821 transitions. [2020-10-15 03:39:24,000 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 9821 transitions. Word has length 64 [2020-10-15 03:39:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:24,001 INFO L479 AbstractCegarLoop]: Abstraction has 6842 states and 9821 transitions. [2020-10-15 03:39:24,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:39:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 9821 transitions. [2020-10-15 03:39:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 03:39:24,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:24,004 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:39:24,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:39:24,005 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:24,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1634821095, now seen corresponding path program 1 times [2020-10-15 03:39:24,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:24,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080061246] [2020-10-15 03:39:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:24,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:24,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:27,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:27,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 03:39:27,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:39:27,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3094 [2020-10-15 03:39:27,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:27,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:27,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:39:27,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:39:27,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 03:39:27,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:39:27,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:27,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:27,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:27,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:27,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:27,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:39:27,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:27,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:27,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:27,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 03:39:27,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080061246] [2020-10-15 03:39:27,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:27,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:39:27,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180007297] [2020-10-15 03:39:27,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:39:27,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:27,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:39:27,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:27,298 INFO L87 Difference]: Start difference. First operand 6842 states and 9821 transitions. Second operand 6 states. [2020-10-15 03:39:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:28,582 INFO L93 Difference]: Finished difference Result 16202 states and 23540 transitions. [2020-10-15 03:39:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:39:28,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-15 03:39:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:28,637 INFO L225 Difference]: With dead ends: 16202 [2020-10-15 03:39:28,638 INFO L226 Difference]: Without dead ends: 13042 [2020-10-15 03:39:28,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:39:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13042 states. [2020-10-15 03:39:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13042 to 11278. [2020-10-15 03:39:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11278 states. [2020-10-15 03:39:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11278 states to 11278 states and 16181 transitions. [2020-10-15 03:39:29,537 INFO L78 Accepts]: Start accepts. Automaton has 11278 states and 16181 transitions. Word has length 65 [2020-10-15 03:39:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:29,537 INFO L479 AbstractCegarLoop]: Abstraction has 11278 states and 16181 transitions. [2020-10-15 03:39:29,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:39:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 11278 states and 16181 transitions. [2020-10-15 03:39:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 03:39:29,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:29,540 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:39:29,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:39:29,541 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2121656926, now seen corresponding path program 1 times [2020-10-15 03:39:29,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:29,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102901247] [2020-10-15 03:39:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:29,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:29,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:29,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:32,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:32,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 03:39:32,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:39:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2710 [2020-10-15 03:39:32,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:32,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:39:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:39:32,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 03:39:32,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:39:32,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:32,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:32,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:32,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:32,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:39:32,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:32,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:32,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 03:39:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-15 03:39:32,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102901247] [2020-10-15 03:39:32,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:32,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:39:32,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667337854] [2020-10-15 03:39:32,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:39:32,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:39:32,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:32,419 INFO L87 Difference]: Start difference. First operand 11278 states and 16181 transitions. Second operand 6 states. [2020-10-15 03:39:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:33,690 INFO L93 Difference]: Finished difference Result 17080 states and 24476 transitions. [2020-10-15 03:39:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:39:33,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-15 03:39:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:33,732 INFO L225 Difference]: With dead ends: 17080 [2020-10-15 03:39:33,733 INFO L226 Difference]: Without dead ends: 14682 [2020-10-15 03:39:33,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:39:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14682 states. [2020-10-15 03:39:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14682 to 12520. [2020-10-15 03:39:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12520 states. [2020-10-15 03:39:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12520 states to 12520 states and 17951 transitions. [2020-10-15 03:39:34,606 INFO L78 Accepts]: Start accepts. Automaton has 12520 states and 17951 transitions. Word has length 65 [2020-10-15 03:39:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:34,607 INFO L479 AbstractCegarLoop]: Abstraction has 12520 states and 17951 transitions. [2020-10-15 03:39:34,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:39:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 12520 states and 17951 transitions. [2020-10-15 03:39:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 03:39:34,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:34,610 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:39:34,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:39:34,611 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2068554951, now seen corresponding path program 1 times [2020-10-15 03:39:34,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:34,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402347654] [2020-10-15 03:39:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:35,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:35,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 03:39:35,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:39:35,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-15 03:39:35,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:35,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:39:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 03:39:35,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 03:39:35,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:35,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:35,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:35,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:35,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:35,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:35,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:39:35,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:35,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:39:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:39:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:39:35,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402347654] [2020-10-15 03:39:35,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:35,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:39:35,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181269978] [2020-10-15 03:39:35,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:39:35,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:35,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:39:35,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:39:35,821 INFO L87 Difference]: Start difference. First operand 12520 states and 17951 transitions. Second operand 6 states. [2020-10-15 03:39:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:37,036 INFO L93 Difference]: Finished difference Result 20542 states and 29442 transitions. [2020-10-15 03:39:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:39:37,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-15 03:39:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:37,221 INFO L225 Difference]: With dead ends: 20542 [2020-10-15 03:39:37,221 INFO L226 Difference]: Without dead ends: 16376 [2020-10-15 03:39:37,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:39:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16376 states. [2020-10-15 03:39:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16376 to 13718. [2020-10-15 03:39:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13718 states. [2020-10-15 03:39:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13718 states to 13718 states and 19601 transitions. [2020-10-15 03:39:37,992 INFO L78 Accepts]: Start accepts. Automaton has 13718 states and 19601 transitions. Word has length 65 [2020-10-15 03:39:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:37,993 INFO L479 AbstractCegarLoop]: Abstraction has 13718 states and 19601 transitions. [2020-10-15 03:39:37,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:39:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 13718 states and 19601 transitions. [2020-10-15 03:39:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:39:37,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:37,996 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:39:37,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:39:37,997 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1349939223, now seen corresponding path program 1 times [2020-10-15 03:39:37,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:37,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877185092] [2020-10-15 03:39:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:38,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:38,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:38,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:38,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:38,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:39,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:39,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:39,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:43,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:43,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:39:43,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 03:39:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-15 03:39:43,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:43,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:39:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:39:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-15 03:39:43,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:39:43,266 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-15 03:39:43,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:43,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:43,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:43,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:43,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:43,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-15 03:39:43,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:43,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:43,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:39:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:43,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877185092] [2020-10-15 03:39:43,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:43,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:39:43,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435431307] [2020-10-15 03:39:43,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:39:43,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:43,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:39:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:39:43,343 INFO L87 Difference]: Start difference. First operand 13718 states and 19601 transitions. Second operand 8 states. [2020-10-15 03:39:43,496 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-15 03:39:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:46,697 INFO L93 Difference]: Finished difference Result 44895 states and 63877 transitions. [2020-10-15 03:39:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:39:46,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-15 03:39:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:46,785 INFO L225 Difference]: With dead ends: 44895 [2020-10-15 03:39:46,785 INFO L226 Difference]: Without dead ends: 31203 [2020-10-15 03:39:46,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:39:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31203 states. [2020-10-15 03:39:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31203 to 18206. [2020-10-15 03:39:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18206 states. [2020-10-15 03:39:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18206 states to 18206 states and 25413 transitions. [2020-10-15 03:39:48,206 INFO L78 Accepts]: Start accepts. Automaton has 18206 states and 25413 transitions. Word has length 68 [2020-10-15 03:39:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:48,206 INFO L479 AbstractCegarLoop]: Abstraction has 18206 states and 25413 transitions. [2020-10-15 03:39:48,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:39:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 18206 states and 25413 transitions. [2020-10-15 03:39:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:39:48,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:48,211 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:39:48,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:39:48,212 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:48,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1328186176, now seen corresponding path program 1 times [2020-10-15 03:39:48,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:48,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456431167] [2020-10-15 03:39:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:48,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:48,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:48,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:52,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:52,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:39:52,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:39:52,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3773 [2020-10-15 03:39:52,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:52,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:39:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:39:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 03:39:52,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:52,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:39:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:52,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:39:52,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:39:52,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:39:52,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-15 03:39:52,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:39:52,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:39:52,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:39:52,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:39:52,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:39:52,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:39:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:39:52,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456431167] [2020-10-15 03:39:52,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:39:52,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:39:52,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603215427] [2020-10-15 03:39:52,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:39:52,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:39:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:39:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:39:52,229 INFO L87 Difference]: Start difference. First operand 18206 states and 25413 transitions. Second operand 8 states. [2020-10-15 03:39:52,375 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-15 03:39:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:39:56,270 INFO L93 Difference]: Finished difference Result 67614 states and 93429 transitions. [2020-10-15 03:39:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:39:56,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-15 03:39:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:39:56,344 INFO L225 Difference]: With dead ends: 67614 [2020-10-15 03:39:56,344 INFO L226 Difference]: Without dead ends: 49434 [2020-10-15 03:39:56,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:39:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49434 states. [2020-10-15 03:39:59,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49434 to 26060. [2020-10-15 03:39:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26060 states. [2020-10-15 03:39:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26060 states to 26060 states and 35621 transitions. [2020-10-15 03:39:59,272 INFO L78 Accepts]: Start accepts. Automaton has 26060 states and 35621 transitions. Word has length 68 [2020-10-15 03:39:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:39:59,272 INFO L479 AbstractCegarLoop]: Abstraction has 26060 states and 35621 transitions. [2020-10-15 03:39:59,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:39:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26060 states and 35621 transitions. [2020-10-15 03:39:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:39:59,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:39:59,277 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:39:59,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:39:59,277 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:39:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:39:59,278 INFO L82 PathProgramCache]: Analyzing trace with hash 494232845, now seen corresponding path program 1 times [2020-10-15 03:39:59,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:39:59,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518692667] [2020-10-15 03:39:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:39:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:39:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:59,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:59,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:59,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:39:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:01,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:01,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:40:01,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:40:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2515 [2020-10-15 03:40:01,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:01,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:40:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:40:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 03:40:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:40:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:02,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:02,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:02,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:40:02,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:40:02,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:40:02,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:02,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:02,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:40:02,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:40:02,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:40:02,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:40:02,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518692667] [2020-10-15 03:40:02,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:40:02,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 03:40:02,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831239865] [2020-10-15 03:40:02,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:40:02,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:40:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:40:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:40:02,089 INFO L87 Difference]: Start difference. First operand 26060 states and 35621 transitions. Second operand 8 states. [2020-10-15 03:40:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:40:05,391 INFO L93 Difference]: Finished difference Result 61332 states and 83282 transitions. [2020-10-15 03:40:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:40:05,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-15 03:40:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:40:05,441 INFO L225 Difference]: With dead ends: 61332 [2020-10-15 03:40:05,442 INFO L226 Difference]: Without dead ends: 35298 [2020-10-15 03:40:05,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:40:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35298 states. [2020-10-15 03:40:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35298 to 25772. [2020-10-15 03:40:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25772 states. [2020-10-15 03:40:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25772 states to 25772 states and 34698 transitions. [2020-10-15 03:40:07,737 INFO L78 Accepts]: Start accepts. Automaton has 25772 states and 34698 transitions. Word has length 68 [2020-10-15 03:40:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:40:07,737 INFO L479 AbstractCegarLoop]: Abstraction has 25772 states and 34698 transitions. [2020-10-15 03:40:07,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:40:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25772 states and 34698 transitions. [2020-10-15 03:40:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 03:40:07,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:40:07,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:40:07,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:40:07,742 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:40:07,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:40:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135227, now seen corresponding path program 1 times [2020-10-15 03:40:07,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:40:07,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883136321] [2020-10-15 03:40:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:40:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:07,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:08,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:08,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:08,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:10,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2885 [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:40:10,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 03:40:10,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:11,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:40:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:11,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:11,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:40:11,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:40:11,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:40:11,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:11,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:11,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:40:11,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:40:11,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:40:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:40:11,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883136321] [2020-10-15 03:40:11,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:40:11,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:40:11,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050536506] [2020-10-15 03:40:11,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:40:11,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:40:11,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:40:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:40:11,107 INFO L87 Difference]: Start difference. First operand 25772 states and 34698 transitions. Second operand 10 states. [2020-10-15 03:40:11,275 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-15 03:40:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:40:25,847 INFO L93 Difference]: Finished difference Result 140096 states and 186501 transitions. [2020-10-15 03:40:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 03:40:25,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-15 03:40:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:40:26,021 INFO L225 Difference]: With dead ends: 140096 [2020-10-15 03:40:26,021 INFO L226 Difference]: Without dead ends: 132308 [2020-10-15 03:40:26,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-15 03:40:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132308 states. [2020-10-15 03:40:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132308 to 62400. [2020-10-15 03:40:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62400 states. [2020-10-15 03:40:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62400 states to 62400 states and 84216 transitions. [2020-10-15 03:40:34,871 INFO L78 Accepts]: Start accepts. Automaton has 62400 states and 84216 transitions. Word has length 70 [2020-10-15 03:40:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:40:34,871 INFO L479 AbstractCegarLoop]: Abstraction has 62400 states and 84216 transitions. [2020-10-15 03:40:34,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:40:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62400 states and 84216 transitions. [2020-10-15 03:40:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 03:40:34,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:40:34,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:40:34,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:40:34,879 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:40:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:40:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1992286656, now seen corresponding path program 1 times [2020-10-15 03:40:34,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:40:34,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538373023] [2020-10-15 03:40:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:40:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:34,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:35,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:38,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:38,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:38,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:38,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:38,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:39,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:39,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:39,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:39,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:39,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 03:40:39,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:40:39,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:40:39,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:39,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:40:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:40:39,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 03:40:39,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:40:40,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:40:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:40:40,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:40:40,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:40:40,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:40:40,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:40:40,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:40:40,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:40:40,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:40:40,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:40:40,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:40:40,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:40:40,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:40:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:40:40,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538373023] [2020-10-15 03:40:40,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:40:40,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 03:40:40,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181685238] [2020-10-15 03:40:40,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:40:40,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:40:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:40:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:40:40,163 INFO L87 Difference]: Start difference. First operand 62400 states and 84216 transitions. Second operand 9 states. [2020-10-15 03:41:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:41:04,798 INFO L93 Difference]: Finished difference Result 239492 states and 318534 transitions. [2020-10-15 03:41:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 03:41:04,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-10-15 03:41:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:41:05,068 INFO L225 Difference]: With dead ends: 239492 [2020-10-15 03:41:05,069 INFO L226 Difference]: Without dead ends: 183816 [2020-10-15 03:41:05,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 03:41:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183816 states. [2020-10-15 03:41:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183816 to 64888. [2020-10-15 03:41:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64888 states. [2020-10-15 03:41:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64888 states to 64888 states and 87363 transitions. [2020-10-15 03:41:14,022 INFO L78 Accepts]: Start accepts. Automaton has 64888 states and 87363 transitions. Word has length 70 [2020-10-15 03:41:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:41:14,022 INFO L479 AbstractCegarLoop]: Abstraction has 64888 states and 87363 transitions. [2020-10-15 03:41:14,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:41:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 64888 states and 87363 transitions. [2020-10-15 03:41:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 03:41:14,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:41:14,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:41:14,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:41:14,030 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:41:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:41:14,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273845, now seen corresponding path program 1 times [2020-10-15 03:41:14,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:41:14,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343703985] [2020-10-15 03:41:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:41:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:41:14,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:14,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:14,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:14,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:14,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:15,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:15,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:15,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:15,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:16,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:16,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:16,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:17,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:19,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:41:19,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 03:41:19,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:41:19,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 03:41:19,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:41:19,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:41:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:41:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:41:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 03:41:19,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:41:19,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:41:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:41:19,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:41:19,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:41:19,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:41:19,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:41:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:41:19,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343703985] [2020-10-15 03:41:19,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:41:19,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 03:41:19,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538559311] [2020-10-15 03:41:19,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:41:19,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:41:19,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:41:19,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:41:19,261 INFO L87 Difference]: Start difference. First operand 64888 states and 87363 transitions. Second operand 9 states. [2020-10-15 03:41:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:41:47,850 INFO L93 Difference]: Finished difference Result 266029 states and 354168 transitions. [2020-10-15 03:41:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 03:41:47,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-15 03:41:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:41:48,156 INFO L225 Difference]: With dead ends: 266029 [2020-10-15 03:41:48,157 INFO L226 Difference]: Without dead ends: 204648 [2020-10-15 03:41:48,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-10-15 03:41:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204648 states. [2020-10-15 03:42:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204648 to 68676. [2020-10-15 03:42:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68676 states. [2020-10-15 03:42:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68676 states to 68676 states and 92015 transitions. [2020-10-15 03:42:01,463 INFO L78 Accepts]: Start accepts. Automaton has 68676 states and 92015 transitions. Word has length 71 [2020-10-15 03:42:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:01,463 INFO L479 AbstractCegarLoop]: Abstraction has 68676 states and 92015 transitions. [2020-10-15 03:42:01,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:42:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 68676 states and 92015 transitions. [2020-10-15 03:42:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 03:42:01,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:01,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:42:01,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 03:42:01,469 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:01,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2059548944, now seen corresponding path program 1 times [2020-10-15 03:42:01,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:01,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329745388] [2020-10-15 03:42:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:01,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:01,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:01,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:01,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:04,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:04,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 03:42:04,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:42:04,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3180 [2020-10-15 03:42:04,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:04,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:42:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:42:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 03:42:04,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:42:04,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:04,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:04,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:04,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:04,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:42:04,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:04,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:04,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:42:04,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:04,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:42:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:42:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:05,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329745388] [2020-10-15 03:42:05,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:42:05,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 03:42:05,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962907376] [2020-10-15 03:42:05,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:42:05,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:42:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:42:05,010 INFO L87 Difference]: Start difference. First operand 68676 states and 92015 transitions. Second operand 10 states. [2020-10-15 03:42:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:42:31,848 INFO L93 Difference]: Finished difference Result 219009 states and 291717 transitions. [2020-10-15 03:42:31,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 03:42:31,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-15 03:42:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:42:32,055 INFO L225 Difference]: With dead ends: 219009 [2020-10-15 03:42:32,055 INFO L226 Difference]: Without dead ends: 150359 [2020-10-15 03:42:32,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-10-15 03:42:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150359 states. [2020-10-15 03:42:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150359 to 103457. [2020-10-15 03:42:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103457 states. [2020-10-15 03:42:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103457 states to 103457 states and 137893 transitions. [2020-10-15 03:42:48,379 INFO L78 Accepts]: Start accepts. Automaton has 103457 states and 137893 transitions. Word has length 71 [2020-10-15 03:42:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:42:48,380 INFO L479 AbstractCegarLoop]: Abstraction has 103457 states and 137893 transitions. [2020-10-15 03:42:48,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:42:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 103457 states and 137893 transitions. [2020-10-15 03:42:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 03:42:48,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:42:48,384 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-15 03:42:48,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 03:42:48,384 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:42:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:42:48,384 INFO L82 PathProgramCache]: Analyzing trace with hash -928627776, now seen corresponding path program 1 times [2020-10-15 03:42:48,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:42:48,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590481365] [2020-10-15 03:42:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:42:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:48,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:48,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:48,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:50,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:53,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:53,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 03:42:53,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:42:53,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 03:42:53,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:53,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:42:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:42:53,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 03:42:53,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:42:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:42:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:42:53,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:42:53,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:42:53,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:42:53,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:42:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:42:53,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:42:53,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:42:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:42:53,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:42:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:42:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:42:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:42:53,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590481365] [2020-10-15 03:42:53,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:42:53,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 03:42:53,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788324619] [2020-10-15 03:42:53,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:42:53,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:42:53,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:42:53,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:42:53,585 INFO L87 Difference]: Start difference. First operand 103457 states and 137893 transitions. Second operand 9 states.