/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/array-examples/standard_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:38:40,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:38:40,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:38:40,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:38:40,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:38:40,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:38:40,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:38:40,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:38:40,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:38:40,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:38:40,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:38:40,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:38:40,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:38:40,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:38:40,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:38:40,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:38:40,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:38:40,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:38:40,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:38:40,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:38:40,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:38:40,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:38:40,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:38:40,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:38:40,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:38:40,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:38:40,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:38:40,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:38:40,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:38:40,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:38:40,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:38:40,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:38:40,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:38:40,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:38:40,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:38:40,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:38:40,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:38:40,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:38:40,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:38:40,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:38:40,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:38:40,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:38:40,956 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:38:40,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:38:40,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:38:40,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:38:40,958 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:38:40,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:38:40,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:38:40,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:38:40,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:38:40,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:38:40,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:38:40,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:38:40,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:38:40,962 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:38:40,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:38:40,962 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:38:40,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:38:40,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:38:40,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:38:40,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:38:40,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:38:40,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:40,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:38:40,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:38:40,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:38:40,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:38:40,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:38:40,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:38:40,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:38:40,965 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:38:41,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:38:41,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:38:41,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:38:41,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:38:41,301 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:38:41,302 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2020-10-13 23:38:41,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22c36c3d/a84799c6e0b1418f9d047173452fcd75/FLAGff559559a [2020-10-13 23:38:41,829 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:38:41,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2020-10-13 23:38:41,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22c36c3d/a84799c6e0b1418f9d047173452fcd75/FLAGff559559a [2020-10-13 23:38:42,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22c36c3d/a84799c6e0b1418f9d047173452fcd75 [2020-10-13 23:38:42,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:38:42,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:38:42,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:42,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:38:42,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:38:42,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7636aefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42, skipping insertion in model container [2020-10-13 23:38:42,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:38:42,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:38:42,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:42,405 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:38:42,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:38:42,450 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:38:42,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42 WrapperNode [2020-10-13 23:38:42,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:38:42,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:38:42,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:38:42,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:38:42,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... [2020-10-13 23:38:42,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:38:42,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:38:42,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:38:42,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:38:42,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:38:42,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:38:42,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:38:42,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:38:42,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:38:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:38:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:38:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:38:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:38:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:38:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:38:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:38:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:38:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:38:42,923 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:38:42,923 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-13 23:38:42,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:42 BoogieIcfgContainer [2020-10-13 23:38:42,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:38:42,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:38:42,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:38:42,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:38:42,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:38:42" (1/3) ... [2020-10-13 23:38:42,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335d2c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:42, skipping insertion in model container [2020-10-13 23:38:42,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:38:42" (2/3) ... [2020-10-13 23:38:42,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335d2c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:38:42, skipping insertion in model container [2020-10-13 23:38:42,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:38:42" (3/3) ... [2020-10-13 23:38:42,937 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2020-10-13 23:38:42,950 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:38:42,961 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:38:42,977 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:38:43,011 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:38:43,011 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:38:43,012 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:38:43,012 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:38:43,012 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:38:43,012 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:38:43,013 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:38:43,013 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:38:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-13 23:38:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:38:43,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:43,046 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] [2020-10-13 23:38:43,046 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:43,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2020-10-13 23:38:43,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:43,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406324744] [2020-10-13 23:38:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:43,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:46,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:38:46,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:38:46,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3248 [2020-10-13 23:38:46,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:46,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:46,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:38:46,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:46,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:38:46,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:46,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:46,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:46,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:46,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:38:46,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:46,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:46,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:46,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:46,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406324744] [2020-10-13 23:38:46,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:46,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:38:46,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690341787] [2020-10-13 23:38:46,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:38:46,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:46,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:38:46,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:46,565 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-13 23:38:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:46,786 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2020-10-13 23:38:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:38:46,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 23:38:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:46,815 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:38:46,815 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:38:46,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:38:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:38:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:38:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:38:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-13 23:38:46,895 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2020-10-13 23:38:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:46,896 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-13 23:38:46,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:38:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-13 23:38:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:38:46,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:46,898 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] [2020-10-13 23:38:46,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:38:46,900 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1932733742, now seen corresponding path program 1 times [2020-10-13 23:38:46,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:46,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727674763] [2020-10-13 23:38:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:46,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:51,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:51,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:38:51,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:38:51,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:38:51,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:51,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:51,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:38:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:38:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:38:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:51,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:51,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:51,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:51,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:51,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:51,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:38:51,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:51,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:38:51,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727674763] [2020-10-13 23:38:51,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:38:51,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:38:51,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914420916] [2020-10-13 23:38:51,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:38:51,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:38:51,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:51,962 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2020-10-13 23:38:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:52,077 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-13 23:38:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:38:52,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 23:38:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:52,079 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:38:52,079 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:38:52,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:38:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:38:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 23:38:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:38:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-13 23:38:52,090 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-13 23:38:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:52,090 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-13 23:38:52,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:38:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-13 23:38:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:38:52,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:52,092 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] [2020-10-13 23:38:52,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:38:52,092 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:52,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:52,093 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2020-10-13 23:38:52,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:52,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142414488] [2020-10-13 23:38:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:52,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:38:57,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:38:57,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:38:57,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:38:57,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:38:57,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:38:57,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:38:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:38:57,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:38:57,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:38:57,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:38:57,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:38:57,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:38:57,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:38:57,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:38:57,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:38:57,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:38:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:38:57,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142414488] [2020-10-13 23:38:57,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:38:57,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:38:57,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574288662] [2020-10-13 23:38:57,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:38:57,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:38:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:38:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:57,155 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 5 states. [2020-10-13 23:38:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:38:57,311 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-10-13 23:38:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:38:57,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-13 23:38:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:38:57,312 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:38:57,313 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:38:57,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:38:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:38:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 23:38:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:38:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-13 23:38:57,323 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-10-13 23:38:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:38:57,323 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-13 23:38:57,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:38:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-13 23:38:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:38:57,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:38:57,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:38:57,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:38:57,326 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:38:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:38:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2020-10-13 23:38:57,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:38:57,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726342541] [2020-10-13 23:38:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:38:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:38:57,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:38:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:02,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:39:02,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:39:02,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:02,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:02,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:39:02,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:02,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:39:02,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 23:39:02,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:02,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:02,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:02,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:02,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:02,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:02,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:02,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:02,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:02,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:02,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:39:02,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726342541] [2020-10-13 23:39:02,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:02,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:39:02,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841761363] [2020-10-13 23:39:02,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:39:02,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:39:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:39:02,415 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2020-10-13 23:39:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:02,635 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-13 23:39:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:39:02,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-13 23:39:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:02,637 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:39:02,637 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:39:02,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:39:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:39:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 23:39:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:39:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-13 23:39:02,653 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2020-10-13 23:39:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:02,654 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-13 23:39:02,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:39:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-13 23:39:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:39:02,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:02,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:02,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:39:02,657 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:02,658 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2020-10-13 23:39:02,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:02,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479444229] [2020-10-13 23:39:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:02,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:07,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:07,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:39:07,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:07,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:39:07,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:07,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:07,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:39:07,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:07,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:39:07,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:07,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:07,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:07,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:07,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:07,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:07,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:07,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:07,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:07,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:39:07,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479444229] [2020-10-13 23:39:07,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:07,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:39:07,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27773832] [2020-10-13 23:39:07,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:39:07,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:07,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:39:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:39:07,744 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2020-10-13 23:39:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:07,941 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-10-13 23:39:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:39:07,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-13 23:39:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:07,943 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:39:07,943 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:39:07,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:39:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:39:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 23:39:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:39:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-13 23:39:07,953 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2020-10-13 23:39:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:07,954 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-13 23:39:07,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:39:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-13 23:39:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:39:07,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:07,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:07,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:39:07,956 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2020-10-13 23:39:07,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:07,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11881156] [2020-10-13 23:39:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:07,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:10,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:12,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:12,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:39:12,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:12,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:39:12,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:12,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:12,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:39:12,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:39:12,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:39:12,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:13,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:13,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:13,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:13,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:13,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:13,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:13,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:13,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:39:13,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11881156] [2020-10-13 23:39:13,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:13,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:39:13,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120022310] [2020-10-13 23:39:13,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:39:13,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:13,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:39:13,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:39:13,046 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2020-10-13 23:39:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:13,248 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-10-13 23:39:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:39:13,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-13 23:39:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:13,250 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:39:13,250 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:39:13,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:39:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:39:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 23:39:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:39:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-13 23:39:13,260 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2020-10-13 23:39:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:13,260 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-13 23:39:13,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:39:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-13 23:39:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:39:13,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:13,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:13,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:39:13,263 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2020-10-13 23:39:13,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:13,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076086775] [2020-10-13 23:39:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:13,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:15,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:18,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:39:18,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:18,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:39:18,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:18,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:18,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:39:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:39:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:39:18,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:18,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:18,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:18,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 23:39:18,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076086775] [2020-10-13 23:39:18,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:18,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:39:18,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477752891] [2020-10-13 23:39:18,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:39:18,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:39:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:39:18,372 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 9 states. [2020-10-13 23:39:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:18,709 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-13 23:39:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:39:18,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-13 23:39:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:18,711 INFO L225 Difference]: With dead ends: 155 [2020-10-13 23:39:18,711 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:39:18,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:39:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:39:18,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 23:39:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:39:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-13 23:39:18,721 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 74 [2020-10-13 23:39:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:18,721 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-13 23:39:18,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:39:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-13 23:39:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:39:18,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:18,723 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:18,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:39:18,724 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:18,724 INFO L82 PathProgramCache]: Analyzing trace with hash 346386898, now seen corresponding path program 6 times [2020-10-13 23:39:18,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:18,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762741986] [2020-10-13 23:39:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:18,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:22,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:23,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:23,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:39:23,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:39:23,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:39:23,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:23,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:23,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:39:23,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:39:23,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:39:23,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:23,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:23,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:23,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:23,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:23,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:23,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:23,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:23,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-13 23:39:23,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762741986] [2020-10-13 23:39:23,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:23,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:39:23,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267809345] [2020-10-13 23:39:23,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:39:23,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:23,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:39:23,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:23,838 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2020-10-13 23:39:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:24,110 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-13 23:39:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:39:24,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-13 23:39:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:24,112 INFO L225 Difference]: With dead ends: 172 [2020-10-13 23:39:24,112 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:39:24,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:39:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:39:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 23:39:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:39:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-13 23:39:24,123 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 83 [2020-10-13 23:39:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:24,123 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-13 23:39:24,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:39:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-13 23:39:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:39:24,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:24,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:24,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:39:24,125 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -698280774, now seen corresponding path program 7 times [2020-10-13 23:39:24,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:24,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278314309] [2020-10-13 23:39:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:24,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:29,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:39:29,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:29,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:39:29,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:29,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:29,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:39:29,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:39:29,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:39:29,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:29,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:29,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:29,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:29,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:39:29,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:29,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:29,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:29,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-13 23:39:29,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278314309] [2020-10-13 23:39:29,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:29,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:39:29,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210416272] [2020-10-13 23:39:29,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:39:29,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:29,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:39:29,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:39:29,267 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 11 states. [2020-10-13 23:39:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:29,540 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-10-13 23:39:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:39:29,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2020-10-13 23:39:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:29,541 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:39:29,541 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:39:29,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:39:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:39:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 23:39:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:39:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-13 23:39:29,563 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 92 [2020-10-13 23:39:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:29,564 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-13 23:39:29,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:39:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-13 23:39:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 23:39:29,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:29,565 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:29,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:39:29,565 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:29,566 INFO L82 PathProgramCache]: Analyzing trace with hash -732453166, now seen corresponding path program 8 times [2020-10-13 23:39:29,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:29,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309754159] [2020-10-13 23:39:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:29,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:34,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:34,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:39:34,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:34,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:39:34,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:34,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:34,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:39:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 23:39:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:39:34,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:34,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:34,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:34,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:34,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:34,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:34,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:34,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:34,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:34,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:34,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:34,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:34,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 23:39:34,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309754159] [2020-10-13 23:39:34,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:34,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:39:34,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678222814] [2020-10-13 23:39:34,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:39:34,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:39:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:34,708 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2020-10-13 23:39:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:35,119 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2020-10-13 23:39:35,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:39:35,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-13 23:39:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:35,121 INFO L225 Difference]: With dead ends: 206 [2020-10-13 23:39:35,122 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:39:35,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:39:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:39:35,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 23:39:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:39:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-13 23:39:35,146 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 101 [2020-10-13 23:39:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:35,149 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-13 23:39:35,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:39:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-13 23:39:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:39:35,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:35,156 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:35,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:39:35,157 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619322, now seen corresponding path program 9 times [2020-10-13 23:39:35,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:35,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831616837] [2020-10-13 23:39:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:35,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:40,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 23:39:40,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:39:40,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:40,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:39:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 23:39:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:39:40,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:40,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:40,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:40,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:40,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:40,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:40,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:40,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:40,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:39:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-13 23:39:40,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831616837] [2020-10-13 23:39:40,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:40,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:39:40,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775154530] [2020-10-13 23:39:40,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:39:40,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:39:40,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:40,338 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 13 states. [2020-10-13 23:39:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:40,692 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2020-10-13 23:39:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:39:40,693 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-10-13 23:39:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:40,694 INFO L225 Difference]: With dead ends: 223 [2020-10-13 23:39:40,694 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:39:40,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:39:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:39:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 23:39:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:39:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-13 23:39:40,714 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2020-10-13 23:39:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:40,715 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-13 23:39:40,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:39:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-13 23:39:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:39:40,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:40,721 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:40,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:39:40,721 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:40,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1132012590, now seen corresponding path program 10 times [2020-10-13 23:39:40,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:40,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011674450] [2020-10-13 23:39:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:40,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:40,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:41,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:45,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:45,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:39:45,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:45,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:39:45,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:45,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:45,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:39:45,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 23:39:45,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:39:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:45,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:45,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:45,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:45,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:45,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:45,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:45,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:45,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:45,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:45,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:45,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:45,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-13 23:39:45,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011674450] [2020-10-13 23:39:45,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:45,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:39:45,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872217114] [2020-10-13 23:39:45,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:39:45,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:39:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:45,881 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 14 states. [2020-10-13 23:39:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:46,201 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2020-10-13 23:39:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:39:46,202 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-10-13 23:39:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:46,203 INFO L225 Difference]: With dead ends: 240 [2020-10-13 23:39:46,203 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:39:46,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:39:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:39:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-13 23:39:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:39:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2020-10-13 23:39:46,213 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 119 [2020-10-13 23:39:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:46,213 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2020-10-13 23:39:46,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:39:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2020-10-13 23:39:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:39:46,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:46,215 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:46,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:39:46,216 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1513332922, now seen corresponding path program 11 times [2020-10-13 23:39:46,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:46,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468017265] [2020-10-13 23:39:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:46,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:46,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:51,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 23:39:51,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:51,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:39:51,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:51,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:51,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:39:51,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 23:39:51,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:39:51,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:51,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:51,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:51,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:51,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:51,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:51,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:51,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:51,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 23:39:51,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468017265] [2020-10-13 23:39:51,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:51,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:39:51,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342101387] [2020-10-13 23:39:51,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:39:51,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:39:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:51,400 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 15 states. [2020-10-13 23:39:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:51,787 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2020-10-13 23:39:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:39:51,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2020-10-13 23:39:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:51,788 INFO L225 Difference]: With dead ends: 257 [2020-10-13 23:39:51,789 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:39:51,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:39:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:39:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 23:39:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:39:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2020-10-13 23:39:51,808 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 128 [2020-10-13 23:39:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:51,809 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2020-10-13 23:39:51,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:39:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2020-10-13 23:39:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 23:39:51,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:51,811 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:51,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:39:51,811 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash 892014802, now seen corresponding path program 12 times [2020-10-13 23:39:51,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:51,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614380153] [2020-10-13 23:39:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:51,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:56,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:56,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:39:56,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:39:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:39:56,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:56,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:39:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:39:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:39:56,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:57,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:39:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:57,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:39:57,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:39:57,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:39:57,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:39:57,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:39:57,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:39:57,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:39:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:39:57,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:39:57,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:39:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-10-13 23:39:57,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614380153] [2020-10-13 23:39:57,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:39:57,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:39:57,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409760717] [2020-10-13 23:39:57,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:39:57,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:39:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:39:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:39:57,022 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 16 states. [2020-10-13 23:39:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:39:57,433 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-10-13 23:39:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:39:57,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-10-13 23:39:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:39:57,436 INFO L225 Difference]: With dead ends: 274 [2020-10-13 23:39:57,436 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:39:57,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:39:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:39:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 23:39:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 23:39:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2020-10-13 23:39:57,446 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 137 [2020-10-13 23:39:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:39:57,446 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2020-10-13 23:39:57,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:39:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2020-10-13 23:39:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 23:39:57,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:39:57,448 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:39:57,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:39:57,448 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:39:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:39:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1312905542, now seen corresponding path program 13 times [2020-10-13 23:39:57,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:39:57,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371793347] [2020-10-13 23:39:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:39:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:39:57,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:39:57,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:02,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 23:40:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:40:02,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:02,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:40:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 23:40:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:40:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:02,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:02,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:02,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:02,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:02,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:02,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:02,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:02,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:02,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:02,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:02,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:02,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-13 23:40:02,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371793347] [2020-10-13 23:40:02,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:02,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:40:02,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271157350] [2020-10-13 23:40:02,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:40:02,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:02,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:40:02,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:40:02,678 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand 17 states. [2020-10-13 23:40:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:03,107 INFO L93 Difference]: Finished difference Result 291 states and 317 transitions. [2020-10-13 23:40:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:40:03,108 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 146 [2020-10-13 23:40:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:03,109 INFO L225 Difference]: With dead ends: 291 [2020-10-13 23:40:03,110 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:40:03,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:40:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:40:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 23:40:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 23:40:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-13 23:40:03,119 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 146 [2020-10-13 23:40:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:03,120 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-13 23:40:03,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:40:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-13 23:40:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 23:40:03,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:03,122 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:03,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:40:03,122 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash 305939922, now seen corresponding path program 14 times [2020-10-13 23:40:03,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:03,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011910618] [2020-10-13 23:40:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:03,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:08,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:08,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 23:40:08,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:08,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:40:08,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:08,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:08,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:40:08,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:40:08,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:40:08,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:08,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:08,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:08,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:08,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:08,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:08,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:08,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:08,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:08,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-13 23:40:08,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011910618] [2020-10-13 23:40:08,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:08,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:40:08,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213739955] [2020-10-13 23:40:08,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:40:08,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:40:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:40:08,348 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 18 states. [2020-10-13 23:40:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:08,796 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-10-13 23:40:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:40:08,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2020-10-13 23:40:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:08,798 INFO L225 Difference]: With dead ends: 308 [2020-10-13 23:40:08,798 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 23:40:08,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:40:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 23:40:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-13 23:40:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 23:40:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2020-10-13 23:40:08,809 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 155 [2020-10-13 23:40:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:08,809 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2020-10-13 23:40:08,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:40:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2020-10-13 23:40:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 23:40:08,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:08,811 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:08,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:40:08,812 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2109746362, now seen corresponding path program 15 times [2020-10-13 23:40:08,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:08,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914866216] [2020-10-13 23:40:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:08,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:08,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:08,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:09,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:13,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:13,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 23:40:13,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:13,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:40:13,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:13,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:40:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:40:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:40:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:14,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:14,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:14,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:14,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:14,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:14,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:14,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:14,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:14,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:14,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:14,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2020-10-13 23:40:14,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914866216] [2020-10-13 23:40:14,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:14,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:40:14,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96205121] [2020-10-13 23:40:14,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:40:14,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:40:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:40:14,059 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 19 states. [2020-10-13 23:40:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:14,519 INFO L93 Difference]: Finished difference Result 325 states and 351 transitions. [2020-10-13 23:40:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:40:14,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 164 [2020-10-13 23:40:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:14,521 INFO L225 Difference]: With dead ends: 325 [2020-10-13 23:40:14,521 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 23:40:14,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:40:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 23:40:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-13 23:40:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:40:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2020-10-13 23:40:14,531 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 164 [2020-10-13 23:40:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:14,531 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2020-10-13 23:40:14,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:40:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2020-10-13 23:40:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 23:40:14,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:14,534 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:14,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:40:14,534 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash 330463954, now seen corresponding path program 16 times [2020-10-13 23:40:14,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:14,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143864934] [2020-10-13 23:40:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:14,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:14,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:15,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:19,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:19,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:40:19,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:19,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:19,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:19,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:19,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:19,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:19,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:19,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:19,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:19,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:19,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:19,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:19,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2020-10-13 23:40:19,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143864934] [2020-10-13 23:40:19,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:19,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:40:19,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173915465] [2020-10-13 23:40:19,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:40:19,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:40:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:40:19,815 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand 20 states. [2020-10-13 23:40:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:20,231 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2020-10-13 23:40:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:40:20,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 173 [2020-10-13 23:40:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:20,233 INFO L225 Difference]: With dead ends: 342 [2020-10-13 23:40:20,234 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:40:20,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:40:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:40:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-13 23:40:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 23:40:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2020-10-13 23:40:20,244 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 173 [2020-10-13 23:40:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:20,244 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2020-10-13 23:40:20,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:40:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2020-10-13 23:40:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 23:40:20,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:20,246 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:20,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:40:20,247 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1002451642, now seen corresponding path program 17 times [2020-10-13 23:40:20,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:20,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040987884] [2020-10-13 23:40:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:20,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:25,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:25,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 23:40:25,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:25,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 23:40:25,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:25,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:40:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:40:25,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:40:25,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:25,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:25,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:25,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:25,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:25,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:25,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:25,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:25,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:25,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:25,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:25,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2020-10-13 23:40:25,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040987884] [2020-10-13 23:40:25,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:25,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:40:25,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730891435] [2020-10-13 23:40:25,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:40:25,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:40:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:40:25,573 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 21 states. [2020-10-13 23:40:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:26,013 INFO L93 Difference]: Finished difference Result 359 states and 385 transitions. [2020-10-13 23:40:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:40:26,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-10-13 23:40:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:26,016 INFO L225 Difference]: With dead ends: 359 [2020-10-13 23:40:26,016 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:40:26,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:40:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:40:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-13 23:40:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:40:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-13 23:40:26,026 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 182 [2020-10-13 23:40:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:26,026 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-13 23:40:26,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:40:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-13 23:40:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 23:40:26,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:26,028 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:26,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:40:26,028 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1703260114, now seen corresponding path program 18 times [2020-10-13 23:40:26,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:26,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592439516] [2020-10-13 23:40:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:26,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:40:31,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:40:31,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:31,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:31,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:31,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:31,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-10-13 23:40:31,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592439516] [2020-10-13 23:40:31,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:31,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:40:31,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801701609] [2020-10-13 23:40:31,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:40:31,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:40:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:40:31,337 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2020-10-13 23:40:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:31,790 INFO L93 Difference]: Finished difference Result 376 states and 402 transitions. [2020-10-13 23:40:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:40:31,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2020-10-13 23:40:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:31,792 INFO L225 Difference]: With dead ends: 376 [2020-10-13 23:40:31,792 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 23:40:31,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:40:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 23:40:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-13 23:40:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 23:40:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 214 transitions. [2020-10-13 23:40:31,801 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 214 transitions. Word has length 191 [2020-10-13 23:40:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:31,801 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 214 transitions. [2020-10-13 23:40:31,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:40:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 214 transitions. [2020-10-13 23:40:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-13 23:40:31,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:31,803 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:31,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:40:31,803 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:31,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1564915898, now seen corresponding path program 19 times [2020-10-13 23:40:31,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:31,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497380661] [2020-10-13 23:40:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:31,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:31,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:36,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:36,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-13 23:40:36,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:36,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:40:36,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:36,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:40:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:40:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:40:36,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:37,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:37,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:37,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:37,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 23:40:37,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497380661] [2020-10-13 23:40:37,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:37,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:40:37,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200762507] [2020-10-13 23:40:37,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:40:37,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:40:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:37,162 INFO L87 Difference]: Start difference. First operand 205 states and 214 transitions. Second operand 23 states. [2020-10-13 23:40:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:37,715 INFO L93 Difference]: Finished difference Result 393 states and 419 transitions. [2020-10-13 23:40:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:40:37,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-10-13 23:40:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:37,718 INFO L225 Difference]: With dead ends: 393 [2020-10-13 23:40:37,718 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 23:40:37,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:40:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 23:40:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-13 23:40:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 23:40:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2020-10-13 23:40:37,727 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 200 [2020-10-13 23:40:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:37,727 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2020-10-13 23:40:37,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:40:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2020-10-13 23:40:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 23:40:37,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:37,729 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:37,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:40:37,729 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash 531490002, now seen corresponding path program 20 times [2020-10-13 23:40:37,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:37,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52422428] [2020-10-13 23:40:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:37,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:37,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:38,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:42,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:42,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 23:40:42,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:42,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:40:42,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:42,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:40:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:42,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:40:42,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:43,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:43,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:43,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:43,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:43,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:43,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:43,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:43,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:43,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:43,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:43,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2020-10-13 23:40:43,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52422428] [2020-10-13 23:40:43,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:43,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:40:43,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3066664] [2020-10-13 23:40:43,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:40:43,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:40:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:43,142 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 24 states. [2020-10-13 23:40:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:43,726 INFO L93 Difference]: Finished difference Result 410 states and 436 transitions. [2020-10-13 23:40:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:40:43,728 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-10-13 23:40:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:43,730 INFO L225 Difference]: With dead ends: 410 [2020-10-13 23:40:43,730 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 23:40:43,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:40:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 23:40:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-13 23:40:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-13 23:40:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2020-10-13 23:40:43,739 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 209 [2020-10-13 23:40:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:43,740 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2020-10-13 23:40:43,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:40:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2020-10-13 23:40:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-13 23:40:43,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:43,741 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:43,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:40:43,742 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:43,742 INFO L82 PathProgramCache]: Analyzing trace with hash -941900102, now seen corresponding path program 21 times [2020-10-13 23:40:43,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:43,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692617078] [2020-10-13 23:40:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:43,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:43,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:43,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:44,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:48,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:48,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-13 23:40:48,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:48,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:40:48,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:48,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:40:48,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:40:48,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:40:48,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:49,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:49,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:49,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:49,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:49,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2020-10-13 23:40:49,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692617078] [2020-10-13 23:40:49,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:49,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:40:49,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239758264] [2020-10-13 23:40:49,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:40:49,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:49,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:40:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:49,166 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand 25 states. [2020-10-13 23:40:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:49,784 INFO L93 Difference]: Finished difference Result 427 states and 453 transitions. [2020-10-13 23:40:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:40:49,784 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-10-13 23:40:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:49,786 INFO L225 Difference]: With dead ends: 427 [2020-10-13 23:40:49,786 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 23:40:49,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:40:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 23:40:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-13 23:40:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:40:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2020-10-13 23:40:49,797 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 218 [2020-10-13 23:40:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:49,797 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2020-10-13 23:40:49,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:40:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2020-10-13 23:40:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:40:49,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:49,799 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:49,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:40:49,799 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash -970778158, now seen corresponding path program 22 times [2020-10-13 23:40:49,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:49,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352957089] [2020-10-13 23:40:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:49,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:49,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:50,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:51,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:54,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:54,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:40:54,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:40:54,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:40:54,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:54,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:40:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:40:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:40:54,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:40:55,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:40:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:55,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:40:55,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:40:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:40:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:40:55,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:40:55,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:40:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:40:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:40:55,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:40:55,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:40:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2020-10-13 23:40:55,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352957089] [2020-10-13 23:40:55,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:40:55,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:40:55,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215761613] [2020-10-13 23:40:55,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:40:55,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:40:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:40:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:55,392 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 26 states. [2020-10-13 23:40:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:40:55,968 INFO L93 Difference]: Finished difference Result 444 states and 470 transitions. [2020-10-13 23:40:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:40:55,969 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 227 [2020-10-13 23:40:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:40:55,971 INFO L225 Difference]: With dead ends: 444 [2020-10-13 23:40:55,971 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 23:40:55,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:40:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 23:40:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-10-13 23:40:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-13 23:40:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 250 transitions. [2020-10-13 23:40:55,981 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 250 transitions. Word has length 227 [2020-10-13 23:40:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:40:55,982 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 250 transitions. [2020-10-13 23:40:55,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:40:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 250 transitions. [2020-10-13 23:40:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-13 23:40:55,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:40:55,984 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:40:55,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:40:55,984 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:40:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:40:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1426539706, now seen corresponding path program 23 times [2020-10-13 23:40:55,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:40:55,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014426316] [2020-10-13 23:40:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:40:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:40:56,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:40:57,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:01,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:01,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-13 23:41:01,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:01,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:41:01,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:01,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:41:01,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-13 23:41:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:41:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:01,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:01,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:01,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:01,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:01,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:01,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:01,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:01,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:01,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:01,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:01,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:01,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2020-10-13 23:41:01,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014426316] [2020-10-13 23:41:01,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:01,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:41:01,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068724968] [2020-10-13 23:41:01,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:41:01,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:41:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:41:01,532 INFO L87 Difference]: Start difference. First operand 241 states and 250 transitions. Second operand 27 states. [2020-10-13 23:41:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:02,105 INFO L93 Difference]: Finished difference Result 461 states and 487 transitions. [2020-10-13 23:41:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:41:02,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2020-10-13 23:41:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:02,107 INFO L225 Difference]: With dead ends: 461 [2020-10-13 23:41:02,107 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 23:41:02,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:41:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 23:41:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-13 23:41:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 23:41:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 259 transitions. [2020-10-13 23:41:02,116 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 259 transitions. Word has length 236 [2020-10-13 23:41:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:02,116 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 259 transitions. [2020-10-13 23:41:02,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:41:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 259 transitions. [2020-10-13 23:41:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 23:41:02,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:02,118 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:02,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:41:02,119 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash -925020462, now seen corresponding path program 24 times [2020-10-13 23:41:02,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:02,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99613763] [2020-10-13 23:41:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:02,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:03,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:07,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:07,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 23:41:07,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:07,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:41:07,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:07,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:41:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:41:07,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:07,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:07,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:07,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:07,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:07,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:07,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:07,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:07,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:07,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-13 23:41:07,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99613763] [2020-10-13 23:41:07,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:07,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:41:07,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478727889] [2020-10-13 23:41:07,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:41:07,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:41:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:41:07,655 INFO L87 Difference]: Start difference. First operand 250 states and 259 transitions. Second operand 28 states. [2020-10-13 23:41:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:08,423 INFO L93 Difference]: Finished difference Result 478 states and 504 transitions. [2020-10-13 23:41:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:41:08,423 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 245 [2020-10-13 23:41:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:08,425 INFO L225 Difference]: With dead ends: 478 [2020-10-13 23:41:08,425 INFO L226 Difference]: Without dead ends: 259 [2020-10-13 23:41:08,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:41:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-13 23:41:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-10-13 23:41:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-13 23:41:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2020-10-13 23:41:08,434 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 245 [2020-10-13 23:41:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:08,434 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2020-10-13 23:41:08,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:41:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2020-10-13 23:41:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-13 23:41:08,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:08,436 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:08,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:41:08,437 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1381059258, now seen corresponding path program 25 times [2020-10-13 23:41:08,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:08,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773134587] [2020-10-13 23:41:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:08,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:08,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:09,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:10,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-13 23:41:13,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:41:13,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:13,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:41:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-10-13 23:41:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:41:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:14,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:14,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:14,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:14,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:14,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:14,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:14,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:14,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:14,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2020-10-13 23:41:14,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773134587] [2020-10-13 23:41:14,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:14,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:41:14,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241850555] [2020-10-13 23:41:14,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:41:14,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:41:14,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:41:14,051 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 29 states. [2020-10-13 23:41:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:14,748 INFO L93 Difference]: Finished difference Result 495 states and 521 transitions. [2020-10-13 23:41:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:41:14,749 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 254 [2020-10-13 23:41:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:14,751 INFO L225 Difference]: With dead ends: 495 [2020-10-13 23:41:14,751 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 23:41:14,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:41:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 23:41:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-13 23:41:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 23:41:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2020-10-13 23:41:14,764 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 254 [2020-10-13 23:41:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:14,764 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2020-10-13 23:41:14,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:41:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2020-10-13 23:41:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 23:41:14,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:14,766 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:14,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:41:14,767 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash 64259026, now seen corresponding path program 26 times [2020-10-13 23:41:14,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:14,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995006020] [2020-10-13 23:41:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:14,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:16,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:19,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:19,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 23:41:19,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:19,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:41:19,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:19,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:41:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 23:41:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:41:19,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:20,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:20,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:20,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:20,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:20,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:20,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:41:20,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:20,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:20,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:20,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:20,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:20,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2020-10-13 23:41:20,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995006020] [2020-10-13 23:41:20,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:20,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:41:20,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594505602] [2020-10-13 23:41:20,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:41:20,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:41:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:41:20,436 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 30 states. [2020-10-13 23:41:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:21,117 INFO L93 Difference]: Finished difference Result 512 states and 538 transitions. [2020-10-13 23:41:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:41:21,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-10-13 23:41:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:21,120 INFO L225 Difference]: With dead ends: 512 [2020-10-13 23:41:21,120 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 23:41:21,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:41:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 23:41:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-13 23:41:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-13 23:41:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 286 transitions. [2020-10-13 23:41:21,130 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 286 transitions. Word has length 263 [2020-10-13 23:41:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:21,130 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 286 transitions. [2020-10-13 23:41:21,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:41:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 286 transitions. [2020-10-13 23:41:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-13 23:41:21,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:21,132 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:21,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:41:21,133 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:21,133 INFO L82 PathProgramCache]: Analyzing trace with hash 21090490, now seen corresponding path program 27 times [2020-10-13 23:41:21,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:21,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9892628] [2020-10-13 23:41:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:21,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:26,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:26,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-13 23:41:26,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:26,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 23:41:26,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:26,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:41:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-13 23:41:26,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:41:26,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:26,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:26,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:26,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:26,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:26,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:26,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:26,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2020-10-13 23:41:26,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9892628] [2020-10-13 23:41:26,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:26,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:41:26,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758317647] [2020-10-13 23:41:26,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:41:26,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:41:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:41:26,767 INFO L87 Difference]: Start difference. First operand 277 states and 286 transitions. Second operand 31 states. [2020-10-13 23:41:27,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:27,515 INFO L93 Difference]: Finished difference Result 529 states and 555 transitions. [2020-10-13 23:41:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:41:27,515 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 272 [2020-10-13 23:41:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:27,517 INFO L225 Difference]: With dead ends: 529 [2020-10-13 23:41:27,517 INFO L226 Difference]: Without dead ends: 286 [2020-10-13 23:41:27,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:41:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-13 23:41:27,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-10-13 23:41:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-13 23:41:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 295 transitions. [2020-10-13 23:41:27,528 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 295 transitions. Word has length 272 [2020-10-13 23:41:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:27,528 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 295 transitions. [2020-10-13 23:41:27,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:41:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 295 transitions. [2020-10-13 23:41:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-13 23:41:27,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:27,530 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:27,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:41:27,531 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:27,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1057011922, now seen corresponding path program 28 times [2020-10-13 23:41:27,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:27,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366461457] [2020-10-13 23:41:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:27,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:28,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:29,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:32,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:41:32,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:41:32,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:33,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:33,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:33,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:33,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:33,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2020-10-13 23:41:33,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366461457] [2020-10-13 23:41:33,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:33,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:41:33,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246572391] [2020-10-13 23:41:33,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:41:33,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:33,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:41:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:41:33,190 INFO L87 Difference]: Start difference. First operand 286 states and 295 transitions. Second operand 32 states. [2020-10-13 23:41:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:33,951 INFO L93 Difference]: Finished difference Result 546 states and 572 transitions. [2020-10-13 23:41:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:41:33,952 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 281 [2020-10-13 23:41:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:33,954 INFO L225 Difference]: With dead ends: 546 [2020-10-13 23:41:33,955 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 23:41:33,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:41:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 23:41:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-10-13 23:41:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-13 23:41:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 304 transitions. [2020-10-13 23:41:33,965 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 304 transitions. Word has length 281 [2020-10-13 23:41:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:33,965 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 304 transitions. [2020-10-13 23:41:33,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:41:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 304 transitions. [2020-10-13 23:41:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-13 23:41:33,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:33,967 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:33,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:41:33,968 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash 392222394, now seen corresponding path program 29 times [2020-10-13 23:41:33,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:33,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716286108] [2020-10-13 23:41:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:34,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:34,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:39,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:41:39,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:41:39,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:39,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:39,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:39,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:39,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2020-10-13 23:41:39,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716286108] [2020-10-13 23:41:39,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:39,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:41:39,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626443395] [2020-10-13 23:41:39,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:41:39,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:41:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:39,729 INFO L87 Difference]: Start difference. First operand 295 states and 304 transitions. Second operand 33 states. [2020-10-13 23:41:40,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:40,543 INFO L93 Difference]: Finished difference Result 563 states and 589 transitions. [2020-10-13 23:41:40,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:41:40,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 290 [2020-10-13 23:41:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:40,545 INFO L225 Difference]: With dead ends: 563 [2020-10-13 23:41:40,546 INFO L226 Difference]: Without dead ends: 304 [2020-10-13 23:41:40,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:41:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-13 23:41:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-13 23:41:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-13 23:41:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 313 transitions. [2020-10-13 23:41:40,555 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 313 transitions. Word has length 290 [2020-10-13 23:41:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:40,555 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 313 transitions. [2020-10-13 23:41:40,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:41:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 313 transitions. [2020-10-13 23:41:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-13 23:41:40,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:40,557 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:40,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:41:40,558 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1369838126, now seen corresponding path program 30 times [2020-10-13 23:41:40,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:40,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288459098] [2020-10-13 23:41:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:40,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:40,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:41,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:41,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:43,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:45,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:45,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-13 23:41:45,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:45,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 23:41:45,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:45,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:41:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:41:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:41:45,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:46,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:46,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:46,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:46,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:46,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:46,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:46,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:46,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4185 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2020-10-13 23:41:46,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288459098] [2020-10-13 23:41:46,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:46,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:41:46,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437517996] [2020-10-13 23:41:46,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:41:46,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:41:46,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:41:46,368 INFO L87 Difference]: Start difference. First operand 304 states and 313 transitions. Second operand 34 states. [2020-10-13 23:41:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:47,190 INFO L93 Difference]: Finished difference Result 580 states and 606 transitions. [2020-10-13 23:41:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:41:47,191 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 299 [2020-10-13 23:41:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:47,193 INFO L225 Difference]: With dead ends: 580 [2020-10-13 23:41:47,194 INFO L226 Difference]: Without dead ends: 313 [2020-10-13 23:41:47,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:41:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-13 23:41:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2020-10-13 23:41:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-13 23:41:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 322 transitions. [2020-10-13 23:41:47,204 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 322 transitions. Word has length 299 [2020-10-13 23:41:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:47,204 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 322 transitions. [2020-10-13 23:41:47,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:41:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 322 transitions. [2020-10-13 23:41:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-13 23:41:47,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:47,207 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:47,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:41:47,207 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1043750074, now seen corresponding path program 31 times [2020-10-13 23:41:47,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:47,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268961065] [2020-10-13 23:41:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:47,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:49,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:52,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-13 23:41:52,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:52,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:41:52,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:52,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:52,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:41:52,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:41:52,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:41:52,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:52,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:52,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:52,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:52,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4464 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3968 trivial. 0 not checked. [2020-10-13 23:41:52,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268961065] [2020-10-13 23:41:52,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:52,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:41:52,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526075565] [2020-10-13 23:41:52,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:41:52,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:41:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:41:52,964 INFO L87 Difference]: Start difference. First operand 313 states and 322 transitions. Second operand 35 states. [2020-10-13 23:41:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:41:53,810 INFO L93 Difference]: Finished difference Result 597 states and 623 transitions. [2020-10-13 23:41:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:41:53,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 308 [2020-10-13 23:41:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:41:53,812 INFO L225 Difference]: With dead ends: 597 [2020-10-13 23:41:53,812 INFO L226 Difference]: Without dead ends: 322 [2020-10-13 23:41:53,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:41:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-13 23:41:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-10-13 23:41:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-13 23:41:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2020-10-13 23:41:53,822 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 308 [2020-10-13 23:41:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:41:53,822 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2020-10-13 23:41:53,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:41:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2020-10-13 23:41:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-13 23:41:53,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:41:53,825 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:41:53,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:41:53,825 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:41:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:41:53,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1909990098, now seen corresponding path program 32 times [2020-10-13 23:41:53,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:41:53,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263675797] [2020-10-13 23:41:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:41:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:58,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:41:58,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:59,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:41:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:41:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:41:59,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:41:59,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:41:59,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:41:59,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:41:59,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:41:59,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:41:59,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:41:59,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:41:59,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:41:59,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:41:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2020-10-13 23:41:59,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263675797] [2020-10-13 23:41:59,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:41:59,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:41:59,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899555593] [2020-10-13 23:41:59,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:41:59,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:41:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:41:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:41:59,646 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 36 states. [2020-10-13 23:42:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:00,532 INFO L93 Difference]: Finished difference Result 614 states and 640 transitions. [2020-10-13 23:42:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:42:00,532 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 317 [2020-10-13 23:42:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:00,534 INFO L225 Difference]: With dead ends: 614 [2020-10-13 23:42:00,535 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 23:42:00,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:42:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 23:42:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2020-10-13 23:42:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-13 23:42:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 340 transitions. [2020-10-13 23:42:00,545 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 340 transitions. Word has length 317 [2020-10-13 23:42:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:00,545 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 340 transitions. [2020-10-13 23:42:00,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:42:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 340 transitions. [2020-10-13 23:42:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-13 23:42:00,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:00,548 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:00,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:42:00,548 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:00,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1823841606, now seen corresponding path program 33 times [2020-10-13 23:42:00,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:00,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274829453] [2020-10-13 23:42:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:00,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:00,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:01,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:01,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:03,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:05,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-13 23:42:05,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:05,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-13 23:42:05,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:05,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:05,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:42:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-13 23:42:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:42:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:06,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:06,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:06,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:06,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:06,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:06,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:06,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:06,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2020-10-13 23:42:06,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274829453] [2020-10-13 23:42:06,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:06,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:42:06,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145686295] [2020-10-13 23:42:06,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:42:06,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:42:06,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:42:06,457 INFO L87 Difference]: Start difference. First operand 331 states and 340 transitions. Second operand 37 states. [2020-10-13 23:42:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:07,276 INFO L93 Difference]: Finished difference Result 631 states and 657 transitions. [2020-10-13 23:42:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:42:07,277 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 326 [2020-10-13 23:42:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:07,279 INFO L225 Difference]: With dead ends: 631 [2020-10-13 23:42:07,279 INFO L226 Difference]: Without dead ends: 340 [2020-10-13 23:42:07,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:42:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-13 23:42:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2020-10-13 23:42:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 23:42:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-10-13 23:42:07,289 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 326 [2020-10-13 23:42:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:07,289 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-10-13 23:42:07,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:42:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-10-13 23:42:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-13 23:42:07,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:07,292 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:07,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:42:07,292 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash 359880658, now seen corresponding path program 34 times [2020-10-13 23:42:07,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:07,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400476284] [2020-10-13 23:42:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:07,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:07,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:10,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:12,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:12,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-13 23:42:12,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:12,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:42:12,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:12,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:42:12,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:12,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:42:12,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:13,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:13,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:13,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:13,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:13,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:13,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:13,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:13,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:13,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:13,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-10-13 23:42:13,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400476284] [2020-10-13 23:42:13,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:13,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:42:13,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162358247] [2020-10-13 23:42:13,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:42:13,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:13,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:42:13,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:42:13,150 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 38 states. [2020-10-13 23:42:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:14,063 INFO L93 Difference]: Finished difference Result 648 states and 674 transitions. [2020-10-13 23:42:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:42:14,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 335 [2020-10-13 23:42:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:14,066 INFO L225 Difference]: With dead ends: 648 [2020-10-13 23:42:14,066 INFO L226 Difference]: Without dead ends: 349 [2020-10-13 23:42:14,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:42:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-13 23:42:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2020-10-13 23:42:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-13 23:42:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 358 transitions. [2020-10-13 23:42:14,076 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 358 transitions. Word has length 335 [2020-10-13 23:42:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:14,076 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 358 transitions. [2020-10-13 23:42:14,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:42:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 358 transitions. [2020-10-13 23:42:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-13 23:42:14,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:14,079 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:14,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:42:14,079 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash 673507514, now seen corresponding path program 35 times [2020-10-13 23:42:14,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:14,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811031940] [2020-10-13 23:42:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:14,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:19,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:19,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-13 23:42:19,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:42:19,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:19,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:42:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:42:19,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:19,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:19,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:19,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:19,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:19,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:19,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:19,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:19,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:19,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:19,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:19,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:19,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5670 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-10-13 23:42:20,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811031940] [2020-10-13 23:42:20,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:20,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:42:20,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435088236] [2020-10-13 23:42:20,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:42:20,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:20,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:42:20,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:42:20,043 INFO L87 Difference]: Start difference. First operand 349 states and 358 transitions. Second operand 39 states. [2020-10-13 23:42:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:20,987 INFO L93 Difference]: Finished difference Result 665 states and 691 transitions. [2020-10-13 23:42:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:42:20,988 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 344 [2020-10-13 23:42:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:20,990 INFO L225 Difference]: With dead ends: 665 [2020-10-13 23:42:20,990 INFO L226 Difference]: Without dead ends: 358 [2020-10-13 23:42:20,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:42:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-13 23:42:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-10-13 23:42:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-13 23:42:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 367 transitions. [2020-10-13 23:42:20,999 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 367 transitions. Word has length 344 [2020-10-13 23:42:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:21,000 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 367 transitions. [2020-10-13 23:42:21,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:42:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 367 transitions. [2020-10-13 23:42:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-13 23:42:21,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:21,002 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:21,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:42:21,003 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash 287542482, now seen corresponding path program 36 times [2020-10-13 23:42:21,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:21,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715533795] [2020-10-13 23:42:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:21,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:21,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:21,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:21,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:21,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:42:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:26,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:26,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:26,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:26,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:26,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:26,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:26,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:26,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:26,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:26,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 5328 trivial. 0 not checked. [2020-10-13 23:42:27,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715533795] [2020-10-13 23:42:27,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:27,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:42:27,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937830436] [2020-10-13 23:42:27,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:42:27,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:42:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:42:27,015 INFO L87 Difference]: Start difference. First operand 358 states and 367 transitions. Second operand 40 states. [2020-10-13 23:42:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:27,933 INFO L93 Difference]: Finished difference Result 682 states and 708 transitions. [2020-10-13 23:42:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:42:27,933 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 353 [2020-10-13 23:42:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:27,935 INFO L225 Difference]: With dead ends: 682 [2020-10-13 23:42:27,936 INFO L226 Difference]: Without dead ends: 367 [2020-10-13 23:42:27,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:42:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-13 23:42:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2020-10-13 23:42:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-13 23:42:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 376 transitions. [2020-10-13 23:42:27,946 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 376 transitions. Word has length 353 [2020-10-13 23:42:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:27,946 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 376 transitions. [2020-10-13 23:42:27,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:42:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 376 transitions. [2020-10-13 23:42:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-13 23:42:27,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:27,949 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:27,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:42:27,949 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2108821830, now seen corresponding path program 37 times [2020-10-13 23:42:27,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:27,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283404606] [2020-10-13 23:42:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:28,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:28,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:29,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:33,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:33,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-13 23:42:33,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:33,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:42:33,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:33,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:33,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:42:33,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-10-13 23:42:33,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:42:33,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:34,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:34,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:34,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:42:34,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:34,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:34,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:34,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:34,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:34,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6327 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 5624 trivial. 0 not checked. [2020-10-13 23:42:34,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283404606] [2020-10-13 23:42:34,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:34,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:42:34,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995814379] [2020-10-13 23:42:34,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:42:34,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:42:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:42:34,076 INFO L87 Difference]: Start difference. First operand 367 states and 376 transitions. Second operand 41 states. [2020-10-13 23:42:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:35,133 INFO L93 Difference]: Finished difference Result 699 states and 725 transitions. [2020-10-13 23:42:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:42:35,133 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 362 [2020-10-13 23:42:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:35,136 INFO L225 Difference]: With dead ends: 699 [2020-10-13 23:42:35,136 INFO L226 Difference]: Without dead ends: 376 [2020-10-13 23:42:35,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:42:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-13 23:42:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-10-13 23:42:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-13 23:42:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 385 transitions. [2020-10-13 23:42:35,146 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 385 transitions. Word has length 362 [2020-10-13 23:42:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:35,147 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 385 transitions. [2020-10-13 23:42:35,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:42:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 385 transitions. [2020-10-13 23:42:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-13 23:42:35,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:35,149 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:35,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:42:35,150 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:35,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1222689234, now seen corresponding path program 38 times [2020-10-13 23:42:35,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:35,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303829837] [2020-10-13 23:42:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:35,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:40,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-13 23:42:40,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:40,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:42:40,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:40,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:42:40,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 23:42:40,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:42:40,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:41,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:41,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:41,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:41,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:42:41,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:41,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:41,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:41,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:41,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:42:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6669 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5928 trivial. 0 not checked. [2020-10-13 23:42:41,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303829837] [2020-10-13 23:42:41,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:41,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:42:41,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669019227] [2020-10-13 23:42:41,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:42:41,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:41,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:42:41,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:42:41,282 INFO L87 Difference]: Start difference. First operand 376 states and 385 transitions. Second operand 42 states. [2020-10-13 23:42:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:42,271 INFO L93 Difference]: Finished difference Result 716 states and 742 transitions. [2020-10-13 23:42:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:42:42,271 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 371 [2020-10-13 23:42:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:42,273 INFO L225 Difference]: With dead ends: 716 [2020-10-13 23:42:42,273 INFO L226 Difference]: Without dead ends: 385 [2020-10-13 23:42:42,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:42:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-13 23:42:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2020-10-13 23:42:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-13 23:42:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 394 transitions. [2020-10-13 23:42:42,284 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 394 transitions. Word has length 371 [2020-10-13 23:42:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:42,285 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 394 transitions. [2020-10-13 23:42:42,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:42:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 394 transitions. [2020-10-13 23:42:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-13 23:42:42,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:42,287 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:42,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:42:42,288 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:42,288 INFO L82 PathProgramCache]: Analyzing trace with hash 458060986, now seen corresponding path program 39 times [2020-10-13 23:42:42,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:42,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305806495] [2020-10-13 23:42:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking...