/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:19:48,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:19:48,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:19:48,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:19:48,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:19:48,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:19:48,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:19:48,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:19:48,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:19:48,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:19:48,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:19:48,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:19:48,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:19:48,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:19:48,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:19:48,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:19:48,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:19:48,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:19:48,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:19:48,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:19:48,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:19:48,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:19:48,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:19:48,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:19:48,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:19:48,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:19:48,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:19:48,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:19:48,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:19:48,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:19:48,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:19:48,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:19:48,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:19:48,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:19:48,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:19:48,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:19:48,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:19:48,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:19:48,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:19:48,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:19:48,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:19:48,931 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 [2020-10-28 09:19:49,008 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:19:49,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:19:49,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:19:49,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:19:49,015 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:19:49,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:19:49,016 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:19:49,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:19:49,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:19:49,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:19:49,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:19:49,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:19:49,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:19:49,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:19:49,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:19:49,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:19:49,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:19:49,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:19:49,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:19:49,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:19:49,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:19:49,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:19:49,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:19:49,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:19:49,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:19:49,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:19:49,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:19:49,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:19:49,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:19:49,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:19:49,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:19:49,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:19:49,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:19:49,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:19:49,486 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:19:49,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-28 09:19:49,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edcb553b2/a5bd8111844e48bab51883504f389b57/FLAGa49e202d8 [2020-10-28 09:19:50,191 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:19:50,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2020-10-28 09:19:50,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edcb553b2/a5bd8111844e48bab51883504f389b57/FLAGa49e202d8 [2020-10-28 09:19:50,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edcb553b2/a5bd8111844e48bab51883504f389b57 [2020-10-28 09:19:50,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:19:50,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:19:50,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:50,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:19:50,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:19:50,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e713d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50, skipping insertion in model container [2020-10-28 09:19:50,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:19:50,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:19:50,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:50,838 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:19:50,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:50,875 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:19:50,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50 WrapperNode [2020-10-28 09:19:50,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:50,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:19:50,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:19:50,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:19:50,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (1/1) ... [2020-10-28 09:19:50,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:19:50,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:19:50,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:19:50,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:19:50,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (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 [2020-10-28 09:19:51,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:19:51,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:19:51,048 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:19:51,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:19:51,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:19:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:19:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:19:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:19:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:19:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:19:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:19:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:19:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:19:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:19:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:19:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:19:51,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:19:51,504 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:19:51,504 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:19:51,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:51 BoogieIcfgContainer [2020-10-28 09:19:51,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:19:51,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:19:51,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:19:51,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:19:51,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:19:50" (1/3) ... [2020-10-28 09:19:51,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661225fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:51, skipping insertion in model container [2020-10-28 09:19:51,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:50" (2/3) ... [2020-10-28 09:19:51,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661225fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:51, skipping insertion in model container [2020-10-28 09:19:51,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:51" (3/3) ... [2020-10-28 09:19:51,520 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2020-10-28 09:19:51,532 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:19:51,537 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:19:51,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:19:51,588 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:19:51,589 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:19:51,589 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:19:51,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:19:51,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:19:51,589 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:19:51,589 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:19:51,590 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:19:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-28 09:19:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:19:51,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:51,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:51,618 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:51,624 INFO L82 PathProgramCache]: Analyzing trace with hash -110565287, now seen corresponding path program 1 times [2020-10-28 09:19:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:51,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875982805] [2020-10-28 09:19:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:51,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:51,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:51,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:19:51,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:51,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-28 09:19:51,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:51,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:51,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:51,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:19:51,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:51,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:19:52,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:52,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:52,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 09:19:52,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:52,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:52,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:52,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:52,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875982805] [2020-10-28 09:19:52,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:52,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:19:52,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308231256] [2020-10-28 09:19:52,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:19:52,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:52,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:19:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:19:52,099 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-28 09:19:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:52,235 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-28 09:19:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:19:52,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 09:19:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:52,246 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:19:52,246 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 09:19:52,252 INFO L677 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 [2020-10-28 09:19:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 09:19:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 09:19:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 09:19:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-28 09:19:52,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-28 09:19:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:52,303 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-28 09:19:52,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:19:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-28 09:19:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:19:52,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:52,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:52,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:19:52,307 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:52,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2144226899, now seen corresponding path program 1 times [2020-10-28 09:19:52,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:52,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208236692] [2020-10-28 09:19:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:19:52,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:52,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 09:19:52,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:19:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:52,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:19:52,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 19 [2020-10-28 09:19:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:52,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:52,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 09:19:52,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:52,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:52,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208236692] [2020-10-28 09:19:52,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:52,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:19:52,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601503373] [2020-10-28 09:19:52,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:19:52,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:19:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:19:52,637 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-28 09:19:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:52,723 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-28 09:19:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:19:52,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 09:19:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:52,726 INFO L225 Difference]: With dead ends: 43 [2020-10-28 09:19:52,727 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:19:52,727 INFO L677 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 [2020-10-28 09:19:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:19:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-28 09:19:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:19:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 09:19:52,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-10-28 09:19:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:52,739 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 09:19:52,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:19:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 09:19:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:19:52,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:52,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:52,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:19:52,742 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -246080399, now seen corresponding path program 1 times [2020-10-28 09:19:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:52,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546921559] [2020-10-28 09:19:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:53,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:19:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:53,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:53,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:53,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:19:53,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:53,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:53,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546921559] [2020-10-28 09:19:53,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:53,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:19:53,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261131189] [2020-10-28 09:19:53,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:19:53,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:19:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:19:53,257 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-28 09:19:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:53,394 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-28 09:19:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:19:53,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 09:19:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:53,396 INFO L225 Difference]: With dead ends: 54 [2020-10-28 09:19:53,396 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:19:53,397 INFO L677 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 [2020-10-28 09:19:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:19:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-28 09:19:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:19:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-28 09:19:53,411 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 17 [2020-10-28 09:19:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:53,412 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-28 09:19:53,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:19:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-28 09:19:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:19:53,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:53,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:53,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:19:53,414 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash 476109583, now seen corresponding path program 2 times [2020-10-28 09:19:53,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:53,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075438417] [2020-10-28 09:19:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:19:53,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:53,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 09:19:53,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:19:53,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:53,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:19:53,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:53,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:53,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:53,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:53,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:19:53,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:53,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:53,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:53,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:53,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075438417] [2020-10-28 09:19:53,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:53,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:19:53,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295726374] [2020-10-28 09:19:53,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:19:53,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:19:53,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:19:53,891 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-10-28 09:19:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:54,019 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-28 09:19:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:19:54,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 09:19:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:54,021 INFO L225 Difference]: With dead ends: 66 [2020-10-28 09:19:54,021 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 09:19:54,022 INFO L677 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 [2020-10-28 09:19:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 09:19:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-28 09:19:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:19:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-28 09:19:54,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 19 [2020-10-28 09:19:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:54,046 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-28 09:19:54,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:19:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-28 09:19:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:19:54,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:54,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:54,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:19:54,047 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1284019667, now seen corresponding path program 3 times [2020-10-28 09:19:54,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:54,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382414063] [2020-10-28 09:19:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:54,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:54,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:19:54,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-28 09:19:54,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:54,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:19:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:19:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:54,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:54,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:54,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:54,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:54,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:54,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:54,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:54,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:54,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:54,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382414063] [2020-10-28 09:19:54,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:54,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:19:54,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653335910] [2020-10-28 09:19:54,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:19:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:54,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:19:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:19:54,644 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 7 states. [2020-10-28 09:19:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:54,790 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-28 09:19:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:19:54,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 09:19:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:54,791 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:19:54,791 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 09:19:54,792 INFO L677 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 [2020-10-28 09:19:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 09:19:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-28 09:19:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:19:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 09:19:54,801 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 21 [2020-10-28 09:19:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:54,801 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 09:19:54,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:19:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 09:19:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:19:54,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:54,802 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:54,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:19:54,803 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash -551114293, now seen corresponding path program 4 times [2020-10-28 09:19:54,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:54,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059242990] [2020-10-28 09:19:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:54,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:55,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:19:55,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:55,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-28 09:19:55,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:55,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:55,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:55,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:55,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:19:55,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:55,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:55,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:55,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:55,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:55,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:55,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:55,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:55,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:55,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:55,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:19:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:55,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059242990] [2020-10-28 09:19:55,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:55,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:19:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193200490] [2020-10-28 09:19:55,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:19:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:55,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:19:55,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:55,639 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 8 states. [2020-10-28 09:19:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:55,826 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-28 09:19:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:19:55,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 09:19:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:55,828 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:19:55,828 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:19:55,829 INFO L677 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 [2020-10-28 09:19:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:19:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-28 09:19:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:19:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-28 09:19:55,838 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 23 [2020-10-28 09:19:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:55,839 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-28 09:19:55,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:19:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-28 09:19:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:19:55,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:55,840 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:55,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:19:55,840 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash -603686423, now seen corresponding path program 5 times [2020-10-28 09:19:55,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:55,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289155112] [2020-10-28 09:19:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:55,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:56,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:19:56,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:56,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 847 [2020-10-28 09:19:56,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:56,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:19:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:19:56,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:56,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:56,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:56,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:56,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:56,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:56,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:56,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:56,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:56,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:56,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 09:19:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289155112] [2020-10-28 09:19:56,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:56,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:19:56,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538992261] [2020-10-28 09:19:56,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:19:56,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:56,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:19:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:19:56,903 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 9 states. [2020-10-28 09:19:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:57,191 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-28 09:19:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:19:57,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 09:19:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:57,192 INFO L225 Difference]: With dead ends: 63 [2020-10-28 09:19:57,193 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 09:19:57,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:19:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 09:19:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 09:19:57,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:19:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-28 09:19:57,204 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 25 [2020-10-28 09:19:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:57,204 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-28 09:19:57,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:19:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-28 09:19:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:19:57,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:57,206 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:57,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:19:57,208 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:57,208 INFO L82 PathProgramCache]: Analyzing trace with hash -626965023, now seen corresponding path program 1 times [2020-10-28 09:19:57,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:57,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868236308] [2020-10-28 09:19:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:57,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 09:19:57,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:57,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-28 09:19:57,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:57,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:19:57,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:57,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:19:57,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:57,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:57,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:57,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:57,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:57,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:57,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:57,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 09:19:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:57,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:57,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:57,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:57,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:57,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:57,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:57,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:57,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:19:57,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:57,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:19:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868236308] [2020-10-28 09:19:57,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:57,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:19:57,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989886780] [2020-10-28 09:19:57,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:19:57,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:57,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:19:57,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:19:57,499 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 9 states. [2020-10-28 09:19:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:57,744 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-28 09:19:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:19:57,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 09:19:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:57,746 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:19:57,746 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:19:57,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:19:57,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:19:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-28 09:19:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:19:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-28 09:19:57,767 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 34 [2020-10-28 09:19:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:57,767 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-28 09:19:57,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:19:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-28 09:19:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:19:57,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:57,769 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:57,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:19:57,769 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:57,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1590875907, now seen corresponding path program 2 times [2020-10-28 09:19:57,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:57,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024755197] [2020-10-28 09:19:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:57,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:57,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:19:57,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-28 09:19:57,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:57,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:19:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:57,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:19:57,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:58,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:58,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 09:19:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:58,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:58,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:19:58,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:19:58,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024755197] [2020-10-28 09:19:58,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:58,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:19:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367894587] [2020-10-28 09:19:58,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:19:58,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:58,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:19:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:19:58,112 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 10 states. [2020-10-28 09:19:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:58,299 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-28 09:19:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:19:58,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-28 09:19:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:58,301 INFO L225 Difference]: With dead ends: 122 [2020-10-28 09:19:58,301 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 09:19:58,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:19:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 09:19:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-28 09:19:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:19:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2020-10-28 09:19:58,311 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 36 [2020-10-28 09:19:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:58,312 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2020-10-28 09:19:58,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:19:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2020-10-28 09:19:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:19:58,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:58,313 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:58,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:19:58,313 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1662736475, now seen corresponding path program 3 times [2020-10-28 09:19:58,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:58,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357554341] [2020-10-28 09:19:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:19:58,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-28 09:19:58,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:19:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:58,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:19:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:58,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:58,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:19:58,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:58,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 09:19:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:58,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:58,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:19:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:19:58,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357554341] [2020-10-28 09:19:58,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:58,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:19:58,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897090428] [2020-10-28 09:19:58,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:19:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:19:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:19:58,700 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 11 states. [2020-10-28 09:19:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:58,934 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2020-10-28 09:19:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:19:58,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-28 09:19:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:58,935 INFO L225 Difference]: With dead ends: 134 [2020-10-28 09:19:58,935 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 09:19:58,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:19:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 09:19:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-28 09:19:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:19:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-28 09:19:58,945 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 38 [2020-10-28 09:19:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:58,945 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-28 09:19:58,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:19:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-28 09:19:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:19:58,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:58,946 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:58,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:19:58,947 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1648044089, now seen corresponding path program 4 times [2020-10-28 09:19:58,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:58,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294808466] [2020-10-28 09:19:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:59,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:19:59,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-28 09:19:59,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:59,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:19:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:19:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:59,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:59,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:59,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:59,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:59,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:59,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:59,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:59,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:59,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:59,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:59,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 09:19:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:59,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:59,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:59,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:59,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:59,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:19:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:59,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:19:59,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294808466] [2020-10-28 09:19:59,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:59,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:19:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451147139] [2020-10-28 09:19:59,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:19:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:19:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:19:59,278 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 12 states. [2020-10-28 09:19:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:59,530 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-10-28 09:19:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:19:59,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-28 09:19:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:59,532 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:19:59,532 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:19:59,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:19:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:19:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-28 09:19:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:19:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-28 09:19:59,542 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 40 [2020-10-28 09:19:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:59,542 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-28 09:19:59,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:19:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-28 09:19:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:19:59,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:59,543 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:59,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:19:59,544 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:59,544 INFO L82 PathProgramCache]: Analyzing trace with hash -413563031, now seen corresponding path program 5 times [2020-10-28 09:19:59,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:59,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642972289] [2020-10-28 09:19:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:59,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:19:59,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:59,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-28 09:19:59,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:59,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:19:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:19:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:19:59,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:59,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:59,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:59,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:59,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:59,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:59,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:59,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:59,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:59,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:59,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:59,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 09:19:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:59,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:59,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:59,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:59,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:59,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:00,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:00,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:00,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642972289] [2020-10-28 09:20:00,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:00,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:20:00,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240999104] [2020-10-28 09:20:00,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:20:00,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:00,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:20:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:20:00,006 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 13 states. [2020-10-28 09:20:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:00,301 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-10-28 09:20:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:20:00,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-28 09:20:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:00,303 INFO L225 Difference]: With dead ends: 158 [2020-10-28 09:20:00,303 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 09:20:00,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:20:00,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 09:20:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-28 09:20:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 09:20:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2020-10-28 09:20:00,312 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 42 [2020-10-28 09:20:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:00,313 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2020-10-28 09:20:00,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:20:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2020-10-28 09:20:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:20:00,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:00,314 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:00,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:20:00,314 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash 511760011, now seen corresponding path program 6 times [2020-10-28 09:20:00,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:00,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611099474] [2020-10-28 09:20:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:00,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:00,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:20:00,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:00,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-28 09:20:00,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:00,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:00,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:20:00,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:00,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:20:00,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:00,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:00,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:00,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:00,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:00,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:00,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:00,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:00,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:00,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:00,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 09:20:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:00,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:00,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:00,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:00,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:00,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:00,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611099474] [2020-10-28 09:20:00,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:00,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:20:00,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480509760] [2020-10-28 09:20:00,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:20:00,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:00,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:20:00,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:00,686 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 14 states. [2020-10-28 09:20:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:00,961 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2020-10-28 09:20:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:20:00,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-28 09:20:00,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:00,962 INFO L225 Difference]: With dead ends: 170 [2020-10-28 09:20:00,962 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 09:20:00,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:00,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 09:20:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-28 09:20:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 09:20:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-10-28 09:20:00,972 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 44 [2020-10-28 09:20:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:00,972 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-10-28 09:20:00,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:20:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-10-28 09:20:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:20:00,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:00,974 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:00,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:20:00,974 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:00,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash 688973101, now seen corresponding path program 7 times [2020-10-28 09:20:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:00,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058446991] [2020-10-28 09:20:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:00,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:01,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:20:01,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:01,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-28 09:20:01,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:01,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:01,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:20:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:20:01,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:01,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:01,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:01,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:01,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:01,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:01,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:01,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:01,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:01,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:01,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:01,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:20:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:01,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:01,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:01,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:01,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:01,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:01,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:01,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:01,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:01,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058446991] [2020-10-28 09:20:01,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:01,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:20:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108739079] [2020-10-28 09:20:01,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:20:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:20:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:20:01,493 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 15 states. [2020-10-28 09:20:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:01,846 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2020-10-28 09:20:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:20:01,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-28 09:20:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:01,848 INFO L225 Difference]: With dead ends: 182 [2020-10-28 09:20:01,848 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 09:20:01,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:20:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 09:20:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-10-28 09:20:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:20:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2020-10-28 09:20:01,857 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 46 [2020-10-28 09:20:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:01,858 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2020-10-28 09:20:01,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:20:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2020-10-28 09:20:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:20:01,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:01,859 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:01,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:20:01,859 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash -807939249, now seen corresponding path program 8 times [2020-10-28 09:20:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:01,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311996625] [2020-10-28 09:20:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:01,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:02,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:20:02,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:02,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-28 09:20:02,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:02,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:02,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:20:02,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:02,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:20:02,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:02,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:02,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:02,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:02,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:02,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:02,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:02,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:02,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:02,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:02,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:02,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:02,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:20:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:02,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:02,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:02,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:02,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:02,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:02,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311996625] [2020-10-28 09:20:02,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:02,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:20:02,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778289458] [2020-10-28 09:20:02,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:20:02,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:20:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:20:02,388 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand 16 states. [2020-10-28 09:20:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:02,697 INFO L93 Difference]: Finished difference Result 194 states and 222 transitions. [2020-10-28 09:20:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:02,698 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-28 09:20:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:02,699 INFO L225 Difference]: With dead ends: 194 [2020-10-28 09:20:02,699 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:20:02,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:20:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:20:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-10-28 09:20:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 09:20:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2020-10-28 09:20:02,707 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 48 [2020-10-28 09:20:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:02,708 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2020-10-28 09:20:02,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:20:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2020-10-28 09:20:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:20:02,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:02,709 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:02,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:20:02,709 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:02,709 INFO L82 PathProgramCache]: Analyzing trace with hash -526663439, now seen corresponding path program 9 times [2020-10-28 09:20:02,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:02,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123933003] [2020-10-28 09:20:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:02,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:20:03,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:03,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-28 09:20:03,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:20:03,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:03,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:20:03,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:03,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:03,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:03,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:03,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:03,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:03,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:03,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:03,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:20:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:03,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:03,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:03,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:03,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:03,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:03,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123933003] [2020-10-28 09:20:03,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:03,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:20:03,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563905445] [2020-10-28 09:20:03,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:20:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:20:03,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:03,245 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 17 states. [2020-10-28 09:20:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:03,658 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2020-10-28 09:20:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:20:03,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-28 09:20:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:03,660 INFO L225 Difference]: With dead ends: 206 [2020-10-28 09:20:03,660 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 09:20:03,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 09:20:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-28 09:20:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 09:20:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2020-10-28 09:20:03,669 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 50 [2020-10-28 09:20:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:03,669 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2020-10-28 09:20:03,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:20:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2020-10-28 09:20:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:03,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:03,670 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:03,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:20:03,670 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash -803549677, now seen corresponding path program 10 times [2020-10-28 09:20:03,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:03,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483920814] [2020-10-28 09:20:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:04,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-28 09:20:04,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:20:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:20:04,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:04,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:20:04,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:04,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:04,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:04,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:20:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:04,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:04,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:04,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:04,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:04,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483920814] [2020-10-28 09:20:04,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:04,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:20:04,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454036691] [2020-10-28 09:20:04,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:20:04,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:04,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:20:04,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:04,280 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand 18 states. [2020-10-28 09:20:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:04,730 INFO L93 Difference]: Finished difference Result 218 states and 250 transitions. [2020-10-28 09:20:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:20:04,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-28 09:20:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:04,734 INFO L225 Difference]: With dead ends: 218 [2020-10-28 09:20:04,734 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 09:20:04,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 09:20:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-28 09:20:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 09:20:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2020-10-28 09:20:04,752 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 52 [2020-10-28 09:20:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:04,753 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2020-10-28 09:20:04,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:20:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2020-10-28 09:20:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:20:04,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:04,753 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:04,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:20:04,754 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash -603252043, now seen corresponding path program 11 times [2020-10-28 09:20:04,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:04,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746253192] [2020-10-28 09:20:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:20:05,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-28 09:20:05,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:20:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:20:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:05,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:05,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:05,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:20:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:05,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:05,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:05,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:05,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:05,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:05,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746253192] [2020-10-28 09:20:05,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:05,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:20:05,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299265716] [2020-10-28 09:20:05,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:20:05,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:20:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:20:05,496 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand 19 states. [2020-10-28 09:20:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:05,936 INFO L93 Difference]: Finished difference Result 230 states and 264 transitions. [2020-10-28 09:20:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:20:05,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-28 09:20:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:05,938 INFO L225 Difference]: With dead ends: 230 [2020-10-28 09:20:05,939 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:20:05,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:20:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:20:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-10-28 09:20:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 09:20:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2020-10-28 09:20:05,961 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 54 [2020-10-28 09:20:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:05,961 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2020-10-28 09:20:05,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:20:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2020-10-28 09:20:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:20:05,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:05,962 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:05,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:20:05,962 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1390754089, now seen corresponding path program 12 times [2020-10-28 09:20:05,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:05,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488585408] [2020-10-28 09:20:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:06,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:20:06,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:06,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-28 09:20:06,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:06,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:06,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:20:06,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:06,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:06,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:06,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:06,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:06,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:06,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:06,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:06,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:06,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:06,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:06,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:20:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:06,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:06,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:06,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:06,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:06,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:06,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:06,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488585408] [2020-10-28 09:20:06,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:06,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:20:06,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520534491] [2020-10-28 09:20:06,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:20:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:20:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:06,695 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand 20 states. [2020-10-28 09:20:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:07,092 INFO L93 Difference]: Finished difference Result 242 states and 278 transitions. [2020-10-28 09:20:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:20:07,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-10-28 09:20:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:07,094 INFO L225 Difference]: With dead ends: 242 [2020-10-28 09:20:07,094 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 09:20:07,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 09:20:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-10-28 09:20:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 09:20:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2020-10-28 09:20:07,117 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 56 [2020-10-28 09:20:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:07,118 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2020-10-28 09:20:07,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:20:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2020-10-28 09:20:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 09:20:07,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:07,118 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:07,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:20:07,119 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:07,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:07,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2028991097, now seen corresponding path program 13 times [2020-10-28 09:20:07,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:07,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170015920] [2020-10-28 09:20:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:07,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:20:07,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:07,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-28 09:20:07,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:07,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:20:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:20:07,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:07,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:07,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:07,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:07,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:07,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:07,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:07,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:07,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:07,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:20:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:07,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:07,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:07,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:07,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:07,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:07,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:07,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:07,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:07,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:07,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:07,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170015920] [2020-10-28 09:20:07,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:07,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:20:07,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414283330] [2020-10-28 09:20:07,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:20:07,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:20:07,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:07,915 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand 21 states. [2020-10-28 09:20:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:08,325 INFO L93 Difference]: Finished difference Result 254 states and 292 transitions. [2020-10-28 09:20:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:20:08,331 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-10-28 09:20:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:08,333 INFO L225 Difference]: With dead ends: 254 [2020-10-28 09:20:08,333 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 09:20:08,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 09:20:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-28 09:20:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 09:20:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2020-10-28 09:20:08,352 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 58 [2020-10-28 09:20:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:08,352 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2020-10-28 09:20:08,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:20:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2020-10-28 09:20:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 09:20:08,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:08,355 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:08,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:20:08,355 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:08,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1540833893, now seen corresponding path program 14 times [2020-10-28 09:20:08,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:08,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945106510] [2020-10-28 09:20:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:08,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 09:20:08,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:08,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-28 09:20:08,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:08,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:08,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:20:08,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:08,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:20:08,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:09,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:09,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:09,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:09,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:09,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:09,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:09,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:20:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:09,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:09,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:09,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:09,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:09,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:09,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:09,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945106510] [2020-10-28 09:20:09,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:09,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:20:09,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671312579] [2020-10-28 09:20:09,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:20:09,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:09,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:20:09,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:20:09,219 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand 22 states. [2020-10-28 09:20:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:09,796 INFO L93 Difference]: Finished difference Result 266 states and 306 transitions. [2020-10-28 09:20:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:20:09,800 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-28 09:20:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:09,801 INFO L225 Difference]: With dead ends: 266 [2020-10-28 09:20:09,801 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 09:20:09,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:20:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 09:20:09,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-28 09:20:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 09:20:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2020-10-28 09:20:09,812 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 60 [2020-10-28 09:20:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:09,813 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2020-10-28 09:20:09,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:20:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2020-10-28 09:20:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 09:20:09,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:09,814 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:09,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:20:09,814 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:09,814 INFO L82 PathProgramCache]: Analyzing trace with hash -463779779, now seen corresponding path program 15 times [2020-10-28 09:20:09,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:09,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073942567] [2020-10-28 09:20:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:09,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:20:10,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:10,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-28 09:20:10,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:20:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:10,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:20:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:10,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:10,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:10,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:10,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:20:10,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:10,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:10,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:10,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:10,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:20:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:10,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:10,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:10,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:10,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:10,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:10,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:10,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073942567] [2020-10-28 09:20:10,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:10,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:20:10,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14464745] [2020-10-28 09:20:10,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:20:10,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:10,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:20:10,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:20:10,696 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand 23 states. [2020-10-28 09:20:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:11,279 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2020-10-28 09:20:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:20:11,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2020-10-28 09:20:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:11,282 INFO L225 Difference]: With dead ends: 278 [2020-10-28 09:20:11,282 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 09:20:11,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:20:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 09:20:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-10-28 09:20:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 09:20:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 185 transitions. [2020-10-28 09:20:11,301 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 185 transitions. Word has length 62 [2020-10-28 09:20:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:11,302 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 185 transitions. [2020-10-28 09:20:11,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:20:11,302 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 185 transitions. [2020-10-28 09:20:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:20:11,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:11,303 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:11,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:20:11,303 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:11,304 INFO L82 PathProgramCache]: Analyzing trace with hash -501894561, now seen corresponding path program 16 times [2020-10-28 09:20:11,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:11,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244838129] [2020-10-28 09:20:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:11,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:11,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 09:20:11,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:11,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-28 09:20:11,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:11,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:11,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:20:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:20:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:12,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:12,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:12,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:12,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:12,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:12,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:12,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:12,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:12,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:12,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:12,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:12,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:20:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:12,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:12,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:12,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:12,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:12,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:12,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:12,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:12,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:12,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:12,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:12,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:12,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244838129] [2020-10-28 09:20:12,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:12,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:20:12,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142229341] [2020-10-28 09:20:12,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:20:12,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:12,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:20:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:20:12,257 INFO L87 Difference]: Start difference. First operand 164 states and 185 transitions. Second operand 24 states. [2020-10-28 09:20:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:12,733 INFO L93 Difference]: Finished difference Result 290 states and 334 transitions. [2020-10-28 09:20:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:20:12,733 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-10-28 09:20:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:12,735 INFO L225 Difference]: With dead ends: 290 [2020-10-28 09:20:12,735 INFO L226 Difference]: Without dead ends: 173 [2020-10-28 09:20:12,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:20:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-28 09:20:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-10-28 09:20:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-28 09:20:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2020-10-28 09:20:12,748 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 64 [2020-10-28 09:20:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:12,748 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2020-10-28 09:20:12,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:20:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2020-10-28 09:20:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:20:12,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:12,749 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:12,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:20:12,749 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:12,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:12,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1524505601, now seen corresponding path program 17 times [2020-10-28 09:20:12,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:12,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235497377] [2020-10-28 09:20:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:20:13,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-28 09:20:13,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:20:13,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:13,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:20:13,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:13,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:13,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:13,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:20:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:13,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:13,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:13,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:13,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:13,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:13,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235497377] [2020-10-28 09:20:13,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:13,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:20:13,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431807734] [2020-10-28 09:20:13,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:20:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:20:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:20:13,694 INFO L87 Difference]: Start difference. First operand 171 states and 193 transitions. Second operand 25 states. [2020-10-28 09:20:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:14,400 INFO L93 Difference]: Finished difference Result 302 states and 348 transitions. [2020-10-28 09:20:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:20:14,400 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-28 09:20:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:14,402 INFO L225 Difference]: With dead ends: 302 [2020-10-28 09:20:14,402 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 09:20:14,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:20:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 09:20:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-28 09:20:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 09:20:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 201 transitions. [2020-10-28 09:20:14,414 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 201 transitions. Word has length 66 [2020-10-28 09:20:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:14,415 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 201 transitions. [2020-10-28 09:20:14,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:20:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 201 transitions. [2020-10-28 09:20:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:20:14,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:14,416 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:14,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:20:14,416 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:14,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1020091101, now seen corresponding path program 18 times [2020-10-28 09:20:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:14,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117581457] [2020-10-28 09:20:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:14,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:20:15,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:15,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-28 09:20:15,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:20:15,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:15,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:20:15,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:20:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:15,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:15,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:15,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:15,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117581457] [2020-10-28 09:20:15,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:15,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:20:15,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13656199] [2020-10-28 09:20:15,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:20:15,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:20:15,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:20:15,501 INFO L87 Difference]: Start difference. First operand 178 states and 201 transitions. Second operand 26 states. [2020-10-28 09:20:16,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:16,108 INFO L93 Difference]: Finished difference Result 314 states and 362 transitions. [2020-10-28 09:20:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:20:16,108 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-10-28 09:20:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:16,110 INFO L225 Difference]: With dead ends: 314 [2020-10-28 09:20:16,110 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 09:20:16,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:20:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 09:20:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-10-28 09:20:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-28 09:20:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 209 transitions. [2020-10-28 09:20:16,123 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 209 transitions. Word has length 68 [2020-10-28 09:20:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:16,123 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 209 transitions. [2020-10-28 09:20:16,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:20:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 209 transitions. [2020-10-28 09:20:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:20:16,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:16,124 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:16,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:20:16,125 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1753836997, now seen corresponding path program 19 times [2020-10-28 09:20:16,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:16,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58569236] [2020-10-28 09:20:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:16,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-28 09:20:16,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:20:16,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:17,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:17,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:17,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:17,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:17,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:20:17,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:17,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:17,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:17,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:17,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:17,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:17,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:20:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:17,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:17,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:17,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:17,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:17,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:17,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:17,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:17,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:17,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58569236] [2020-10-28 09:20:17,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:17,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:20:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601279237] [2020-10-28 09:20:17,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:20:17,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:20:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:20:17,189 INFO L87 Difference]: Start difference. First operand 185 states and 209 transitions. Second operand 27 states. [2020-10-28 09:20:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:17,767 INFO L93 Difference]: Finished difference Result 326 states and 376 transitions. [2020-10-28 09:20:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:20:17,767 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 70 [2020-10-28 09:20:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:17,770 INFO L225 Difference]: With dead ends: 326 [2020-10-28 09:20:17,770 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 09:20:17,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:20:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 09:20:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-28 09:20:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 09:20:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 217 transitions. [2020-10-28 09:20:17,784 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 217 transitions. Word has length 70 [2020-10-28 09:20:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:17,784 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 217 transitions. [2020-10-28 09:20:17,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:20:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 217 transitions. [2020-10-28 09:20:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:20:17,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:17,785 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:17,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:20:17,785 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash 324048359, now seen corresponding path program 20 times [2020-10-28 09:20:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:17,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054595887] [2020-10-28 09:20:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:17,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:18,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:20:18,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:18,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-28 09:20:18,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:18,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:18,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:20:18,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:18,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:20:18,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:19,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:19,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:19,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:19,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:19,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:19,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:19,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:19,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:20:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:19,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:19,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:19,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:19,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:19,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:19,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:19,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:19,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:19,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054595887] [2020-10-28 09:20:19,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:19,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:20:19,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841631665] [2020-10-28 09:20:19,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:20:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:20:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:20:19,029 INFO L87 Difference]: Start difference. First operand 192 states and 217 transitions. Second operand 28 states. [2020-10-28 09:20:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:19,640 INFO L93 Difference]: Finished difference Result 338 states and 390 transitions. [2020-10-28 09:20:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:20:19,640 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 72 [2020-10-28 09:20:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:19,642 INFO L225 Difference]: With dead ends: 338 [2020-10-28 09:20:19,643 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 09:20:19,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:20:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 09:20:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-28 09:20:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-28 09:20:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 225 transitions. [2020-10-28 09:20:19,656 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 225 transitions. Word has length 72 [2020-10-28 09:20:19,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:19,656 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 225 transitions. [2020-10-28 09:20:19,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:20:19,656 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 225 transitions. [2020-10-28 09:20:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:20:19,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:19,657 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:19,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:20:19,657 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:19,658 INFO L82 PathProgramCache]: Analyzing trace with hash 686701961, now seen corresponding path program 21 times [2020-10-28 09:20:19,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:19,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940049395] [2020-10-28 09:20:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:20,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:20:20,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:20,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-28 09:20:20,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:20,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:20:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:20:20,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:20,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:20,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:20,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:20,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:20,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:20:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:20,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:20,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:20,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:20,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:20,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:20,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:20,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:20,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:20,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:20,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:20,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940049395] [2020-10-28 09:20:20,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:20,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:20:20,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24178762] [2020-10-28 09:20:20,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:20:20,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:20,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:20:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:20:20,869 INFO L87 Difference]: Start difference. First operand 199 states and 225 transitions. Second operand 29 states. [2020-10-28 09:20:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:21,724 INFO L93 Difference]: Finished difference Result 350 states and 404 transitions. [2020-10-28 09:20:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:20:21,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2020-10-28 09:20:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:21,727 INFO L225 Difference]: With dead ends: 350 [2020-10-28 09:20:21,727 INFO L226 Difference]: Without dead ends: 208 [2020-10-28 09:20:21,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:20:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-28 09:20:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-10-28 09:20:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-28 09:20:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 233 transitions. [2020-10-28 09:20:21,760 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 233 transitions. Word has length 74 [2020-10-28 09:20:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:21,761 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 233 transitions. [2020-10-28 09:20:21,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:20:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 233 transitions. [2020-10-28 09:20:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:20:21,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:21,764 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:21,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:20:21,764 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1304462507, now seen corresponding path program 22 times [2020-10-28 09:20:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:21,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320972113] [2020-10-28 09:20:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:21,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:22,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:20:22,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:22,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-28 09:20:22,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:22,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:20:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:20:22,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:23,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:23,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:23,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:23,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:23,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:23,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:23,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:23,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:23,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:23,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:23,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:23,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:20:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:23,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:23,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:23,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:23,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:23,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:23,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:23,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:23,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:23,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:23,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:23,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:23,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320972113] [2020-10-28 09:20:23,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:23,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:20:23,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896101007] [2020-10-28 09:20:23,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:20:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:23,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:20:23,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:20:23,033 INFO L87 Difference]: Start difference. First operand 206 states and 233 transitions. Second operand 30 states. [2020-10-28 09:20:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:23,840 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2020-10-28 09:20:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:20:23,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2020-10-28 09:20:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:23,843 INFO L225 Difference]: With dead ends: 362 [2020-10-28 09:20:23,843 INFO L226 Difference]: Without dead ends: 215 [2020-10-28 09:20:23,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:20:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-28 09:20:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2020-10-28 09:20:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 09:20:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 241 transitions. [2020-10-28 09:20:23,857 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 241 transitions. Word has length 76 [2020-10-28 09:20:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:23,858 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 241 transitions. [2020-10-28 09:20:23,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:20:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 241 transitions. [2020-10-28 09:20:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:20:23,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:23,859 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:23,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:20:23,859 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2028106931, now seen corresponding path program 23 times [2020-10-28 09:20:23,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:23,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325885943] [2020-10-28 09:20:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:23,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:24,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:20:24,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:24,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-28 09:20:24,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:24,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:24,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:20:24,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:24,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:20:24,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:25,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:25,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:25,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:20:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:25,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:25,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:25,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:25,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:25,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:25,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:25,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325885943] [2020-10-28 09:20:25,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:25,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:20:25,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652887127] [2020-10-28 09:20:25,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:20:25,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:25,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:20:25,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:20:25,350 INFO L87 Difference]: Start difference. First operand 213 states and 241 transitions. Second operand 31 states. [2020-10-28 09:20:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:26,285 INFO L93 Difference]: Finished difference Result 374 states and 432 transitions. [2020-10-28 09:20:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:20:26,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 78 [2020-10-28 09:20:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:26,290 INFO L225 Difference]: With dead ends: 374 [2020-10-28 09:20:26,290 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 09:20:26,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:20:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 09:20:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-10-28 09:20:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 09:20:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 249 transitions. [2020-10-28 09:20:26,317 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 249 transitions. Word has length 78 [2020-10-28 09:20:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:26,317 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 249 transitions. [2020-10-28 09:20:26,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:20:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 249 transitions. [2020-10-28 09:20:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:20:26,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:26,318 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:26,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:20:26,319 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:26,319 INFO L82 PathProgramCache]: Analyzing trace with hash -581734033, now seen corresponding path program 24 times [2020-10-28 09:20:26,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:26,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446477772] [2020-10-28 09:20:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:20:27,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:20:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:27,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:27,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:27,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:20:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:27,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:27,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:27,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:27,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446477772] [2020-10-28 09:20:27,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:27,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:20:27,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999111225] [2020-10-28 09:20:27,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:20:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:27,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:20:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:20:27,778 INFO L87 Difference]: Start difference. First operand 220 states and 249 transitions. Second operand 32 states. [2020-10-28 09:20:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:28,742 INFO L93 Difference]: Finished difference Result 386 states and 446 transitions. [2020-10-28 09:20:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:20:28,743 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2020-10-28 09:20:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:28,745 INFO L225 Difference]: With dead ends: 386 [2020-10-28 09:20:28,745 INFO L226 Difference]: Without dead ends: 229 [2020-10-28 09:20:28,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:20:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-28 09:20:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-28 09:20:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-28 09:20:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 257 transitions. [2020-10-28 09:20:28,767 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 257 transitions. Word has length 80 [2020-10-28 09:20:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:28,767 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 257 transitions. [2020-10-28 09:20:28,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:20:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 257 transitions. [2020-10-28 09:20:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:20:28,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:28,768 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:28,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:20:28,769 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2108184337, now seen corresponding path program 25 times [2020-10-28 09:20:28,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:28,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806965405] [2020-10-28 09:20:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:28,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:29,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:20:29,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:29,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-28 09:20:29,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:29,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:29,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:20:29,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:20:29,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:30,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:30,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:30,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:30,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:20:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:30,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:30,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:30,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806965405] [2020-10-28 09:20:30,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:30,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:20:30,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617624622] [2020-10-28 09:20:30,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:20:30,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:20:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:20:30,267 INFO L87 Difference]: Start difference. First operand 227 states and 257 transitions. Second operand 33 states. [2020-10-28 09:20:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:31,215 INFO L93 Difference]: Finished difference Result 398 states and 460 transitions. [2020-10-28 09:20:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:20:31,216 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2020-10-28 09:20:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:31,218 INFO L225 Difference]: With dead ends: 398 [2020-10-28 09:20:31,218 INFO L226 Difference]: Without dead ends: 236 [2020-10-28 09:20:31,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:20:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-28 09:20:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2020-10-28 09:20:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 09:20:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 265 transitions. [2020-10-28 09:20:31,240 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 265 transitions. Word has length 82 [2020-10-28 09:20:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:31,240 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 265 transitions. [2020-10-28 09:20:31,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:20:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 265 transitions. [2020-10-28 09:20:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 09:20:31,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:31,241 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:31,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:20:31,241 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1549425715, now seen corresponding path program 26 times [2020-10-28 09:20:31,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:31,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595718671] [2020-10-28 09:20:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:31,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:31,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:31,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:20:31,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:32,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:32,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:32,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:32,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:20:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:32,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:32,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:32,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:32,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:32,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:32,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:32,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595718671] [2020-10-28 09:20:32,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:32,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:20:32,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289161283] [2020-10-28 09:20:32,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:20:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:20:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:20:32,661 INFO L87 Difference]: Start difference. First operand 234 states and 265 transitions. Second operand 34 states. [2020-10-28 09:20:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:33,714 INFO L93 Difference]: Finished difference Result 410 states and 474 transitions. [2020-10-28 09:20:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:20:33,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-10-28 09:20:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:33,716 INFO L225 Difference]: With dead ends: 410 [2020-10-28 09:20:33,716 INFO L226 Difference]: Without dead ends: 243 [2020-10-28 09:20:33,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:20:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-28 09:20:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2020-10-28 09:20:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 09:20:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 273 transitions. [2020-10-28 09:20:33,731 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 273 transitions. Word has length 84 [2020-10-28 09:20:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:33,731 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 273 transitions. [2020-10-28 09:20:33,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:20:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 273 transitions. [2020-10-28 09:20:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 09:20:33,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:33,732 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:33,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:20:33,732 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:33,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1453301973, now seen corresponding path program 27 times [2020-10-28 09:20:33,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:33,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720204392] [2020-10-28 09:20:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:33,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:34,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:34,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:20:34,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:34,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-28 09:20:34,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:34,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:20:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:20:34,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:35,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:35,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:35,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:20:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:35,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:35,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:35,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:35,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:35,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:35,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:35,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:35,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720204392] [2020-10-28 09:20:35,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:35,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:20:35,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314554301] [2020-10-28 09:20:35,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:20:35,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:20:35,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:20:35,327 INFO L87 Difference]: Start difference. First operand 241 states and 273 transitions. Second operand 35 states. [2020-10-28 09:20:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:36,435 INFO L93 Difference]: Finished difference Result 422 states and 488 transitions. [2020-10-28 09:20:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:20:36,436 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-10-28 09:20:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:36,439 INFO L225 Difference]: With dead ends: 422 [2020-10-28 09:20:36,440 INFO L226 Difference]: Without dead ends: 250 [2020-10-28 09:20:36,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:20:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-28 09:20:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2020-10-28 09:20:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-28 09:20:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 281 transitions. [2020-10-28 09:20:36,453 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 281 transitions. Word has length 86 [2020-10-28 09:20:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:36,454 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 281 transitions. [2020-10-28 09:20:36,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:20:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 281 transitions. [2020-10-28 09:20:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:20:36,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:36,455 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:36,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:20:36,455 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash -727300873, now seen corresponding path program 28 times [2020-10-28 09:20:36,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:36,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773074083] [2020-10-28 09:20:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:36,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:37,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:20:37,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:38,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:38,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:38,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:38,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:38,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:38,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:38,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:20:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:38,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:38,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:38,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:38,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:38,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:38,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:38,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:38,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:38,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:38,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773074083] [2020-10-28 09:20:38,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:38,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:20:38,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003477028] [2020-10-28 09:20:38,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:20:38,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:20:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:20:38,048 INFO L87 Difference]: Start difference. First operand 248 states and 281 transitions. Second operand 36 states. [2020-10-28 09:20:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:38,951 INFO L93 Difference]: Finished difference Result 434 states and 502 transitions. [2020-10-28 09:20:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:20:38,952 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 88 [2020-10-28 09:20:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:38,954 INFO L225 Difference]: With dead ends: 434 [2020-10-28 09:20:38,954 INFO L226 Difference]: Without dead ends: 257 [2020-10-28 09:20:38,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:20:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-28 09:20:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2020-10-28 09:20:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-28 09:20:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 289 transitions. [2020-10-28 09:20:38,979 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 289 transitions. Word has length 88 [2020-10-28 09:20:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:38,980 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 289 transitions. [2020-10-28 09:20:38,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:20:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 289 transitions. [2020-10-28 09:20:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:20:38,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:38,984 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:38,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:20:38,984 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash -342595431, now seen corresponding path program 29 times [2020-10-28 09:20:38,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:38,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14636988] [2020-10-28 09:20:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:39,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:39,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 09:20:39,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-28 09:20:39,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:39,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:20:39,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:39,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:20:39,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:40,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:40,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:40,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:40,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:40,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:40,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:40,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:40,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:40,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:40,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:20:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:40,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:40,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:40,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:40,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14636988] [2020-10-28 09:20:40,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:40,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:20:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358578313] [2020-10-28 09:20:40,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:20:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:20:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:20:40,598 INFO L87 Difference]: Start difference. First operand 255 states and 289 transitions. Second operand 37 states. [2020-10-28 09:20:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:41,576 INFO L93 Difference]: Finished difference Result 446 states and 516 transitions. [2020-10-28 09:20:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:20:41,576 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 90 [2020-10-28 09:20:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:41,578 INFO L225 Difference]: With dead ends: 446 [2020-10-28 09:20:41,578 INFO L226 Difference]: Without dead ends: 264 [2020-10-28 09:20:41,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:20:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-28 09:20:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-10-28 09:20:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-28 09:20:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 297 transitions. [2020-10-28 09:20:41,592 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 297 transitions. Word has length 90 [2020-10-28 09:20:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:41,592 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 297 transitions. [2020-10-28 09:20:41,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:20:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 297 transitions. [2020-10-28 09:20:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 09:20:41,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:41,593 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:41,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:20:41,593 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash -7853125, now seen corresponding path program 30 times [2020-10-28 09:20:41,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:41,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529647655] [2020-10-28 09:20:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:20:42,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:42,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 09:20:42,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:43,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:43,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-28 09:20:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:43,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:43,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:43,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:43,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:43,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:43,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:43,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:43,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529647655] [2020-10-28 09:20:43,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:43,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:20:43,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858836294] [2020-10-28 09:20:43,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:20:43,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:43,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:20:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:20:43,270 INFO L87 Difference]: Start difference. First operand 262 states and 297 transitions. Second operand 38 states. [2020-10-28 09:20:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:44,589 INFO L93 Difference]: Finished difference Result 458 states and 530 transitions. [2020-10-28 09:20:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:20:44,589 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2020-10-28 09:20:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:44,592 INFO L225 Difference]: With dead ends: 458 [2020-10-28 09:20:44,592 INFO L226 Difference]: Without dead ends: 271 [2020-10-28 09:20:44,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:20:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-28 09:20:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2020-10-28 09:20:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-28 09:20:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 305 transitions. [2020-10-28 09:20:44,607 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 305 transitions. Word has length 92 [2020-10-28 09:20:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:44,607 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 305 transitions. [2020-10-28 09:20:44,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:20:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 305 transitions. [2020-10-28 09:20:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 09:20:44,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:44,608 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:44,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:20:44,608 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -443044259, now seen corresponding path program 31 times [2020-10-28 09:20:44,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:44,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684923379] [2020-10-28 09:20:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:45,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:45,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:20:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:46,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:46,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:20:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:46,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:46,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:46,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:46,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:46,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:46,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:46,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684923379] [2020-10-28 09:20:46,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:46,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:20:46,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959844213] [2020-10-28 09:20:46,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:20:46,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:46,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:20:46,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:20:46,399 INFO L87 Difference]: Start difference. First operand 269 states and 305 transitions. Second operand 39 states. [2020-10-28 09:20:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:47,684 INFO L93 Difference]: Finished difference Result 470 states and 544 transitions. [2020-10-28 09:20:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:20:47,685 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 94 [2020-10-28 09:20:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:47,687 INFO L225 Difference]: With dead ends: 470 [2020-10-28 09:20:47,687 INFO L226 Difference]: Without dead ends: 278 [2020-10-28 09:20:47,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:20:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-28 09:20:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2020-10-28 09:20:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 09:20:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 313 transitions. [2020-10-28 09:20:47,701 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 313 transitions. Word has length 94 [2020-10-28 09:20:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:47,701 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 313 transitions. [2020-10-28 09:20:47,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:20:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 313 transitions. [2020-10-28 09:20:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 09:20:47,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:47,702 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:47,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:20:47,702 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2049896321, now seen corresponding path program 32 times [2020-10-28 09:20:47,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:47,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400436431] [2020-10-28 09:20:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:47,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:20:48,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:49,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:49,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:49,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:49,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:49,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:49,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:49,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:49,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:49,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:49,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 09:20:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:49,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:49,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:49,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:49,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400436431] [2020-10-28 09:20:49,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:49,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:20:49,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766899827] [2020-10-28 09:20:49,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:20:49,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:20:49,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:20:49,482 INFO L87 Difference]: Start difference. First operand 276 states and 313 transitions. Second operand 40 states. [2020-10-28 09:20:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:50,854 INFO L93 Difference]: Finished difference Result 482 states and 558 transitions. [2020-10-28 09:20:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:20:50,855 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2020-10-28 09:20:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:50,857 INFO L225 Difference]: With dead ends: 482 [2020-10-28 09:20:50,857 INFO L226 Difference]: Without dead ends: 285 [2020-10-28 09:20:50,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:20:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-28 09:20:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2020-10-28 09:20:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-28 09:20:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 321 transitions. [2020-10-28 09:20:50,871 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 321 transitions. Word has length 96 [2020-10-28 09:20:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:50,871 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 321 transitions. [2020-10-28 09:20:50,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:20:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 321 transitions. [2020-10-28 09:20:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 09:20:50,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:50,872 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:50,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:20:50,873 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash -46501343, now seen corresponding path program 33 times [2020-10-28 09:20:50,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:50,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959010474] [2020-10-28 09:20:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:51,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 872 [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 09:20:51,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:52,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:52,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:52,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:52,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 09:20:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:52,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:52,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:52,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:52,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:52,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:52,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:52,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:52,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:52,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959010474] [2020-10-28 09:20:52,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:52,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:20:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051140004] [2020-10-28 09:20:52,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:20:52,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:20:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:20:52,880 INFO L87 Difference]: Start difference. First operand 283 states and 321 transitions. Second operand 41 states. [2020-10-28 09:20:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:54,310 INFO L93 Difference]: Finished difference Result 494 states and 572 transitions. [2020-10-28 09:20:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:20:54,311 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 98 [2020-10-28 09:20:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:54,313 INFO L225 Difference]: With dead ends: 494 [2020-10-28 09:20:54,313 INFO L226 Difference]: Without dead ends: 292 [2020-10-28 09:20:54,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:20:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-28 09:20:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2020-10-28 09:20:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-28 09:20:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 329 transitions. [2020-10-28 09:20:54,329 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 329 transitions. Word has length 98 [2020-10-28 09:20:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:54,330 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 329 transitions. [2020-10-28 09:20:54,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:20:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 329 transitions. [2020-10-28 09:20:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 09:20:54,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:54,331 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:54,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:20:54,331 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1070723907, now seen corresponding path program 34 times [2020-10-28 09:20:54,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:54,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964349806] [2020-10-28 09:20:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:55,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 09:20:55,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:56,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:56,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:56,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:56,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:56,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:56,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:56,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:56,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:56,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-28 09:20:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:56,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:56,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:56,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:56,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:56,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:56,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:56,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:56,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964349806] [2020-10-28 09:20:56,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:56,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 09:20:56,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077865762] [2020-10-28 09:20:56,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 09:20:56,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:56,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 09:20:56,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:20:56,325 INFO L87 Difference]: Start difference. First operand 290 states and 329 transitions. Second operand 42 states. [2020-10-28 09:20:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:57,796 INFO L93 Difference]: Finished difference Result 506 states and 586 transitions. [2020-10-28 09:20:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 09:20:57,796 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 100 [2020-10-28 09:20:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:57,798 INFO L225 Difference]: With dead ends: 506 [2020-10-28 09:20:57,798 INFO L226 Difference]: Without dead ends: 299 [2020-10-28 09:20:57,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:20:57,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-28 09:20:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2020-10-28 09:20:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-28 09:20:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 337 transitions. [2020-10-28 09:20:57,811 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 337 transitions. Word has length 100 [2020-10-28 09:20:57,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:57,812 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 337 transitions. [2020-10-28 09:20:57,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 09:20:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 337 transitions. [2020-10-28 09:20:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 09:20:57,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:57,813 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:57,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:20:57,813 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 982365157, now seen corresponding path program 35 times [2020-10-28 09:20:57,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461386834] [2020-10-28 09:20:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:57,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:58,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:20:58,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:58,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-28 09:20:58,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:58,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 09:20:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:20:58,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 09:20:58,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:59,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:59,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:59,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 09:20:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:59,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:59,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:20:59,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461386834] [2020-10-28 09:20:59,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:59,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 09:20:59,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112262138] [2020-10-28 09:20:59,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 09:20:59,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:59,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 09:20:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:20:59,899 INFO L87 Difference]: Start difference. First operand 297 states and 337 transitions. Second operand 43 states. [2020-10-28 09:21:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:01,118 INFO L93 Difference]: Finished difference Result 518 states and 600 transitions. [2020-10-28 09:21:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:21:01,119 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2020-10-28 09:21:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:01,121 INFO L225 Difference]: With dead ends: 518 [2020-10-28 09:21:01,122 INFO L226 Difference]: Without dead ends: 306 [2020-10-28 09:21:01,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:21:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-28 09:21:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-10-28 09:21:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-28 09:21:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 345 transitions. [2020-10-28 09:21:01,133 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 345 transitions. Word has length 102 [2020-10-28 09:21:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:01,134 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 345 transitions. [2020-10-28 09:21:01,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 09:21:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 345 transitions. [2020-10-28 09:21:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:21:01,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:01,134 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:01,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:21:01,135 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1968952327, now seen corresponding path program 36 times [2020-10-28 09:21:01,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:01,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4703440] [2020-10-28 09:21:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:01,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:01,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 09:21:01,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:03,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:03,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:03,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:03,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:03,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:03,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:03,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:03,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:03,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:03,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-28 09:21:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:03,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:03,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:03,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:03,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:03,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:03,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:03,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4703440] [2020-10-28 09:21:03,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:03,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 09:21:03,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330486203] [2020-10-28 09:21:03,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 09:21:03,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 09:21:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:21:03,287 INFO L87 Difference]: Start difference. First operand 304 states and 345 transitions. Second operand 44 states. [2020-10-28 09:21:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:04,575 INFO L93 Difference]: Finished difference Result 530 states and 614 transitions. [2020-10-28 09:21:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 09:21:04,576 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 104 [2020-10-28 09:21:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:04,578 INFO L225 Difference]: With dead ends: 530 [2020-10-28 09:21:04,579 INFO L226 Difference]: Without dead ends: 313 [2020-10-28 09:21:04,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:21:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-28 09:21:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2020-10-28 09:21:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-28 09:21:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 353 transitions. [2020-10-28 09:21:04,592 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 353 transitions. Word has length 104 [2020-10-28 09:21:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:04,593 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 353 transitions. [2020-10-28 09:21:04,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 09:21:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 353 transitions. [2020-10-28 09:21:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 09:21:04,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:04,594 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:04,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:21:04,594 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:04,595 INFO L82 PathProgramCache]: Analyzing trace with hash 891450281, now seen corresponding path program 37 times [2020-10-28 09:21:04,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:04,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117774064] [2020-10-28 09:21:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:05,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 09:21:05,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:05,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-28 09:21:05,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:05,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:05,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 09:21:05,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:05,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 09:21:05,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:06,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:06,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:06,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:06,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:06,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:06,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:06,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:06,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:06,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 09:21:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:06,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:06,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:06,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:06,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:06,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:06,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117774064] [2020-10-28 09:21:06,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:06,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 09:21:06,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870156818] [2020-10-28 09:21:06,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 09:21:06,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:06,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 09:21:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:21:06,887 INFO L87 Difference]: Start difference. First operand 311 states and 353 transitions. Second operand 45 states. [2020-10-28 09:21:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:08,602 INFO L93 Difference]: Finished difference Result 542 states and 628 transitions. [2020-10-28 09:21:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 09:21:08,603 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 106 [2020-10-28 09:21:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:08,606 INFO L225 Difference]: With dead ends: 542 [2020-10-28 09:21:08,606 INFO L226 Difference]: Without dead ends: 320 [2020-10-28 09:21:08,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:21:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-28 09:21:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 318. [2020-10-28 09:21:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-28 09:21:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 361 transitions. [2020-10-28 09:21:08,626 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 361 transitions. Word has length 106 [2020-10-28 09:21:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:08,626 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 361 transitions. [2020-10-28 09:21:08,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 09:21:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 361 transitions. [2020-10-28 09:21:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 09:21:08,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:08,627 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:08,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 09:21:08,627 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 499102411, now seen corresponding path program 38 times [2020-10-28 09:21:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:08,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941582630] [2020-10-28 09:21:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 09:21:09,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:11,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:11,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:11,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:11,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:11,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:11,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:11,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:11,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:11,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:11,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-28 09:21:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:11,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:11,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:11,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:11,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:11,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:11,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:11,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:11,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:11,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:11,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 2 proven. 1764 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:11,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941582630] [2020-10-28 09:21:11,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:11,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 09:21:11,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412699942] [2020-10-28 09:21:11,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 09:21:11,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 09:21:11,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:21:11,133 INFO L87 Difference]: Start difference. First operand 318 states and 361 transitions. Second operand 46 states. [2020-10-28 09:21:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:12,855 INFO L93 Difference]: Finished difference Result 554 states and 642 transitions. [2020-10-28 09:21:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 09:21:12,855 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2020-10-28 09:21:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:12,857 INFO L225 Difference]: With dead ends: 554 [2020-10-28 09:21:12,857 INFO L226 Difference]: Without dead ends: 327 [2020-10-28 09:21:12,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:21:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-28 09:21:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2020-10-28 09:21:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-28 09:21:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 369 transitions. [2020-10-28 09:21:12,870 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 369 transitions. Word has length 108 [2020-10-28 09:21:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:12,871 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 369 transitions. [2020-10-28 09:21:12,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 09:21:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 369 transitions. [2020-10-28 09:21:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 09:21:12,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:12,872 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:12,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 09:21:12,872 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:12,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1409921389, now seen corresponding path program 39 times [2020-10-28 09:21:12,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:12,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318110440] [2020-10-28 09:21:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:12,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:13,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:13,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 09:21:13,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:15,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:15,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:15,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:15,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 09:21:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:15,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:15,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:15,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:15,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:15,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:15,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 2 proven. 1849 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:15,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318110440] [2020-10-28 09:21:15,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:15,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 09:21:15,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970425794] [2020-10-28 09:21:15,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 09:21:15,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:15,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 09:21:15,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:21:15,368 INFO L87 Difference]: Start difference. First operand 325 states and 369 transitions. Second operand 47 states. [2020-10-28 09:21:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:16,697 INFO L93 Difference]: Finished difference Result 566 states and 656 transitions. [2020-10-28 09:21:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 09:21:16,698 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 110 [2020-10-28 09:21:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:16,700 INFO L225 Difference]: With dead ends: 566 [2020-10-28 09:21:16,700 INFO L226 Difference]: Without dead ends: 334 [2020-10-28 09:21:16,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:21:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-28 09:21:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2020-10-28 09:21:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-28 09:21:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 377 transitions. [2020-10-28 09:21:16,712 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 377 transitions. Word has length 110 [2020-10-28 09:21:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:16,713 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 377 transitions. [2020-10-28 09:21:16,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 09:21:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 377 transitions. [2020-10-28 09:21:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 09:21:16,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:16,714 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:16,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 09:21:16,714 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 533630863, now seen corresponding path program 40 times [2020-10-28 09:21:16,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:16,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127839702] [2020-10-28 09:21:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:16,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:17,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 09:21:17,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:17,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-28 09:21:17,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:17,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 09:21:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:17,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 09:21:17,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:19,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:19,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:19,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:19,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:19,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-28 09:21:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:19,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:19,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:19,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 2 proven. 1936 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:19,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127839702] [2020-10-28 09:21:19,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:19,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 09:21:19,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374729531] [2020-10-28 09:21:19,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 09:21:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:19,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 09:21:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:21:19,254 INFO L87 Difference]: Start difference. First operand 332 states and 377 transitions. Second operand 48 states. [2020-10-28 09:21:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:20,889 INFO L93 Difference]: Finished difference Result 578 states and 670 transitions. [2020-10-28 09:21:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 09:21:20,889 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 112 [2020-10-28 09:21:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:20,892 INFO L225 Difference]: With dead ends: 578 [2020-10-28 09:21:20,892 INFO L226 Difference]: Without dead ends: 341 [2020-10-28 09:21:20,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:21:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-28 09:21:20,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 339. [2020-10-28 09:21:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-28 09:21:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 385 transitions. [2020-10-28 09:21:20,906 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 385 transitions. Word has length 112 [2020-10-28 09:21:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:20,906 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 385 transitions. [2020-10-28 09:21:20,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 09:21:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 385 transitions. [2020-10-28 09:21:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 09:21:20,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:20,907 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:20,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 09:21:20,908 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:20,908 INFO L82 PathProgramCache]: Analyzing trace with hash 232025393, now seen corresponding path program 41 times [2020-10-28 09:21:20,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:20,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223298817] [2020-10-28 09:21:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:20,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:21,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:21,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 09:21:21,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:21,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-28 09:21:21,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:21,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 09:21:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 09:21:21,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:23,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:23,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:23,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:23,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:23,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:23,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:23,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:23,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:23,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:23,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-28 09:21:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:23,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:23,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:23,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:23,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:23,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:23,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 2025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:23,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223298817] [2020-10-28 09:21:23,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:23,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 09:21:23,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123831726] [2020-10-28 09:21:23,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 09:21:23,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 09:21:23,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:21:23,568 INFO L87 Difference]: Start difference. First operand 339 states and 385 transitions. Second operand 49 states. [2020-10-28 09:21:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:24,986 INFO L93 Difference]: Finished difference Result 590 states and 684 transitions. [2020-10-28 09:21:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 09:21:24,987 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 114 [2020-10-28 09:21:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:24,989 INFO L225 Difference]: With dead ends: 590 [2020-10-28 09:21:24,990 INFO L226 Difference]: Without dead ends: 348 [2020-10-28 09:21:24,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:21:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-28 09:21:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 346. [2020-10-28 09:21:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-28 09:21:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 393 transitions. [2020-10-28 09:21:25,002 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 393 transitions. Word has length 114 [2020-10-28 09:21:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:25,003 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 393 transitions. [2020-10-28 09:21:25,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 09:21:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 393 transitions. [2020-10-28 09:21:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 09:21:25,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:25,004 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:25,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 09:21:25,004 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1848022445, now seen corresponding path program 42 times [2020-10-28 09:21:25,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:25,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971920646] [2020-10-28 09:21:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:25,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:26,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:26,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 09:21:26,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:26,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1144 [2020-10-28 09:21:26,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:26,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 09:21:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 09:21:26,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:27,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:27,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 09:21:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:27,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:27,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2120 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:27,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971920646] [2020-10-28 09:21:27,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:27,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 09:21:27,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047061720] [2020-10-28 09:21:27,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 09:21:27,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 09:21:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 09:21:27,849 INFO L87 Difference]: Start difference. First operand 346 states and 393 transitions. Second operand 50 states. [2020-10-28 09:21:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:29,833 INFO L93 Difference]: Finished difference Result 602 states and 698 transitions. [2020-10-28 09:21:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 09:21:29,833 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 116 [2020-10-28 09:21:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:29,835 INFO L225 Difference]: With dead ends: 602 [2020-10-28 09:21:29,835 INFO L226 Difference]: Without dead ends: 355 [2020-10-28 09:21:29,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 09:21:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-28 09:21:29,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2020-10-28 09:21:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-28 09:21:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 401 transitions. [2020-10-28 09:21:29,848 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 401 transitions. Word has length 116 [2020-10-28 09:21:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:29,848 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 401 transitions. [2020-10-28 09:21:29,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 09:21:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 401 transitions. [2020-10-28 09:21:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 09:21:29,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:29,849 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:29,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 09:21:29,849 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash 680765173, now seen corresponding path program 43 times [2020-10-28 09:21:29,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:29,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362397090] [2020-10-28 09:21:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:29,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 09:21:30,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:32,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:32,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:32,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:32,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:32,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:32,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:32,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:32,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 09:21:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:32,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:32,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:32,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:32,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362397090] [2020-10-28 09:21:32,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:32,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 09:21:32,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429619237] [2020-10-28 09:21:32,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 09:21:32,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:32,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 09:21:32,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 09:21:32,806 INFO L87 Difference]: Start difference. First operand 353 states and 401 transitions. Second operand 51 states. [2020-10-28 09:21:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:34,585 INFO L93 Difference]: Finished difference Result 614 states and 712 transitions. [2020-10-28 09:21:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 09:21:34,585 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 118 [2020-10-28 09:21:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:34,588 INFO L225 Difference]: With dead ends: 614 [2020-10-28 09:21:34,588 INFO L226 Difference]: Without dead ends: 362 [2020-10-28 09:21:34,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 09:21:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-28 09:21:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-10-28 09:21:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-28 09:21:34,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 409 transitions. [2020-10-28 09:21:34,602 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 409 transitions. Word has length 118 [2020-10-28 09:21:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:34,602 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 409 transitions. [2020-10-28 09:21:34,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 09:21:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 409 transitions. [2020-10-28 09:21:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 09:21:34,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:34,603 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:34,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 09:21:34,603 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash -105823465, now seen corresponding path program 44 times [2020-10-28 09:21:34,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:34,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89331480] [2020-10-28 09:21:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:34,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 09:21:35,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:37,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:37,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-28 09:21:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:37,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:37,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:37,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:37,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:37,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:37,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:37,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:37,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89331480] [2020-10-28 09:21:37,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:37,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 09:21:37,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927666689] [2020-10-28 09:21:37,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 09:21:37,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 09:21:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 09:21:37,791 INFO L87 Difference]: Start difference. First operand 360 states and 409 transitions. Second operand 52 states. [2020-10-28 09:21:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:39,488 INFO L93 Difference]: Finished difference Result 626 states and 726 transitions. [2020-10-28 09:21:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 09:21:39,488 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 120 [2020-10-28 09:21:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:39,490 INFO L225 Difference]: With dead ends: 626 [2020-10-28 09:21:39,491 INFO L226 Difference]: Without dead ends: 369 [2020-10-28 09:21:39,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 09:21:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-28 09:21:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2020-10-28 09:21:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-28 09:21:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 417 transitions. [2020-10-28 09:21:39,503 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 417 transitions. Word has length 120 [2020-10-28 09:21:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:39,504 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 417 transitions. [2020-10-28 09:21:39,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 09:21:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 417 transitions. [2020-10-28 09:21:39,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 09:21:39,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:39,505 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:39,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 09:21:39,505 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -103260487, now seen corresponding path program 45 times [2020-10-28 09:21:39,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:39,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651133494] [2020-10-28 09:21:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:40,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:40,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 09:21:40,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1203 [2020-10-28 09:21:40,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:40,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 09:21:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 09:21:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:42,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:42,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-28 09:21:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:42,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 2 proven. 2401 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:42,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651133494] [2020-10-28 09:21:42,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:42,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 09:21:42,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787710528] [2020-10-28 09:21:42,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 09:21:42,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:42,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 09:21:42,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:21:42,657 INFO L87 Difference]: Start difference. First operand 367 states and 417 transitions. Second operand 53 states. [2020-10-28 09:21:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:44,858 INFO L93 Difference]: Finished difference Result 638 states and 740 transitions. [2020-10-28 09:21:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 09:21:44,859 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 122 [2020-10-28 09:21:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:44,861 INFO L225 Difference]: With dead ends: 638 [2020-10-28 09:21:44,861 INFO L226 Difference]: Without dead ends: 376 [2020-10-28 09:21:44,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:21:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-28 09:21:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2020-10-28 09:21:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-28 09:21:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 425 transitions. [2020-10-28 09:21:44,875 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 425 transitions. Word has length 122 [2020-10-28 09:21:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:44,875 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 425 transitions. [2020-10-28 09:21:44,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 09:21:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 425 transitions. [2020-10-28 09:21:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 09:21:44,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:44,876 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:44,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 09:21:44,877 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1935205925, now seen corresponding path program 46 times [2020-10-28 09:21:44,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:44,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105477549] [2020-10-28 09:21:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1310 [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 09:21:46,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:48,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:48,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:48,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:48,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:48,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:48,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:48,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:48,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-28 09:21:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:48,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:48,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:48,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:48,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:48,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:48,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:48,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2504 backedges. 2 proven. 2500 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:48,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105477549] [2020-10-28 09:21:48,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:48,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 09:21:48,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868657857] [2020-10-28 09:21:48,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 09:21:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 09:21:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:21:48,261 INFO L87 Difference]: Start difference. First operand 374 states and 425 transitions. Second operand 54 states. [2020-10-28 09:21:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:50,541 INFO L93 Difference]: Finished difference Result 650 states and 754 transitions. [2020-10-28 09:21:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 09:21:50,541 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 124 [2020-10-28 09:21:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:50,543 INFO L225 Difference]: With dead ends: 650 [2020-10-28 09:21:50,543 INFO L226 Difference]: Without dead ends: 383 [2020-10-28 09:21:50,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:21:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-28 09:21:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2020-10-28 09:21:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-28 09:21:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 433 transitions. [2020-10-28 09:21:50,558 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 433 transitions. Word has length 124 [2020-10-28 09:21:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:50,558 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 433 transitions. [2020-10-28 09:21:50,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 09:21:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 433 transitions. [2020-10-28 09:21:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 09:21:50,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:50,559 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:50,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 09:21:50,559 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1498180483, now seen corresponding path program 47 times [2020-10-28 09:21:50,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:50,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350927891] [2020-10-28 09:21:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:51,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:51,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 09:21:51,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:51,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1309 [2020-10-28 09:21:51,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:51,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 09:21:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 09:21:51,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:53,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:53,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:53,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-28 09:21:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:53,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:53,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:53,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:53,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:53,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:53,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:53,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:53,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 2 proven. 2601 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:53,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350927891] [2020-10-28 09:21:53,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:53,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-28 09:21:53,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057253332] [2020-10-28 09:21:53,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-28 09:21:53,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:53,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-28 09:21:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 09:21:53,969 INFO L87 Difference]: Start difference. First operand 381 states and 433 transitions. Second operand 55 states. [2020-10-28 09:21:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:56,321 INFO L93 Difference]: Finished difference Result 662 states and 768 transitions. [2020-10-28 09:21:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 09:21:56,321 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 126 [2020-10-28 09:21:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:56,323 INFO L225 Difference]: With dead ends: 662 [2020-10-28 09:21:56,323 INFO L226 Difference]: Without dead ends: 390 [2020-10-28 09:21:56,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 09:21:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-28 09:21:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2020-10-28 09:21:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-28 09:21:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 441 transitions. [2020-10-28 09:21:56,337 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 441 transitions. Word has length 126 [2020-10-28 09:21:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:56,337 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 441 transitions. [2020-10-28 09:21:56,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-28 09:21:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 441 transitions. [2020-10-28 09:21:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 09:21:56,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:56,339 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:56,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 09:21:56,339 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1871441567, now seen corresponding path program 48 times [2020-10-28 09:21:56,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:56,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135568092] [2020-10-28 09:21:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:56,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:57,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:57,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 09:21:57,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:57,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1335 [2020-10-28 09:21:57,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:57,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:57,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-28 09:21:57,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:21:57,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 09:21:57,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:59,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:59,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-28 09:21:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:59,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:59,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:59,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:59,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:59,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:59,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:59,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:59,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:59,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:21:59,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:59,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2708 backedges. 2 proven. 2704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:21:59,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135568092] [2020-10-28 09:21:59,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:59,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-28 09:21:59,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087961142] [2020-10-28 09:21:59,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-28 09:21:59,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-28 09:21:59,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 09:21:59,887 INFO L87 Difference]: Start difference. First operand 388 states and 441 transitions. Second operand 56 states. [2020-10-28 09:22:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:02,295 INFO L93 Difference]: Finished difference Result 674 states and 782 transitions. [2020-10-28 09:22:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 09:22:02,296 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 128 [2020-10-28 09:22:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:02,298 INFO L225 Difference]: With dead ends: 674 [2020-10-28 09:22:02,298 INFO L226 Difference]: Without dead ends: 397 [2020-10-28 09:22:02,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 09:22:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-28 09:22:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2020-10-28 09:22:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-28 09:22:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 449 transitions. [2020-10-28 09:22:02,311 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 449 transitions. Word has length 128 [2020-10-28 09:22:02,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:02,311 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 449 transitions. [2020-10-28 09:22:02,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-28 09:22:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 449 transitions. [2020-10-28 09:22:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 09:22:02,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:02,312 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:02,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 09:22:02,313 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1672890433, now seen corresponding path program 49 times [2020-10-28 09:22:02,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:02,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742911761] [2020-10-28 09:22:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:02,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1411 [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:03,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 09:22:03,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:06,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:06,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:06,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:06,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:06,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:06,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:06,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-28 09:22:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:06,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:06,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:06,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:06,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 2 proven. 2809 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:06,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742911761] [2020-10-28 09:22:06,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:06,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 09:22:06,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884933539] [2020-10-28 09:22:06,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 09:22:06,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 09:22:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:22:06,028 INFO L87 Difference]: Start difference. First operand 395 states and 449 transitions. Second operand 57 states. [2020-10-28 09:22:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:08,563 INFO L93 Difference]: Finished difference Result 686 states and 796 transitions. [2020-10-28 09:22:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 09:22:08,564 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 130 [2020-10-28 09:22:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:08,566 INFO L225 Difference]: With dead ends: 686 [2020-10-28 09:22:08,566 INFO L226 Difference]: Without dead ends: 404 [2020-10-28 09:22:08,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:22:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-28 09:22:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2020-10-28 09:22:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-28 09:22:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 457 transitions. [2020-10-28 09:22:08,580 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 457 transitions. Word has length 130 [2020-10-28 09:22:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:08,580 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 457 transitions. [2020-10-28 09:22:08,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 09:22:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 457 transitions. [2020-10-28 09:22:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 09:22:08,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:08,581 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:08,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 09:22:08,581 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:08,582 INFO L82 PathProgramCache]: Analyzing trace with hash -156188317, now seen corresponding path program 50 times [2020-10-28 09:22:08,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:08,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345060716] [2020-10-28 09:22:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:08,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:10,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 09:22:10,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:10,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-28 09:22:10,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:10,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-28 09:22:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 09:22:10,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:12,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:12,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:12,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:12,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:12,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-28 09:22:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:12,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:12,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:12,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:12,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2920 backedges. 2 proven. 2916 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:12,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345060716] [2020-10-28 09:22:12,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:12,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 09:22:12,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731473848] [2020-10-28 09:22:12,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 09:22:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 09:22:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 09:22:12,460 INFO L87 Difference]: Start difference. First operand 402 states and 457 transitions. Second operand 58 states. [2020-10-28 09:22:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:15,133 INFO L93 Difference]: Finished difference Result 698 states and 810 transitions. [2020-10-28 09:22:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-28 09:22:15,133 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 132 [2020-10-28 09:22:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:15,136 INFO L225 Difference]: With dead ends: 698 [2020-10-28 09:22:15,136 INFO L226 Difference]: Without dead ends: 411 [2020-10-28 09:22:15,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 09:22:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-28 09:22:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2020-10-28 09:22:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-28 09:22:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 465 transitions. [2020-10-28 09:22:15,153 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 465 transitions. Word has length 132 [2020-10-28 09:22:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:15,154 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 465 transitions. [2020-10-28 09:22:15,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 09:22:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 465 transitions. [2020-10-28 09:22:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-28 09:22:15,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:15,155 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:15,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 09:22:15,155 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:15,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1259243003, now seen corresponding path program 51 times [2020-10-28 09:22:15,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:15,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482935612] [2020-10-28 09:22:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:15,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:16,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:16,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1490 [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 09:22:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:19,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:19,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:19,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:19,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:19,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:19,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:19,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:19,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:19,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:19,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-28 09:22:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:19,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:19,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:19,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:19,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:19,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:19,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:19,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:19,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 2 proven. 3025 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:19,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482935612] [2020-10-28 09:22:19,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:19,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-28 09:22:19,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754147961] [2020-10-28 09:22:19,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-28 09:22:19,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-28 09:22:19,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 09:22:19,087 INFO L87 Difference]: Start difference. First operand 409 states and 465 transitions. Second operand 59 states. [2020-10-28 09:22:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:21,242 INFO L93 Difference]: Finished difference Result 710 states and 824 transitions. [2020-10-28 09:22:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 09:22:21,243 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 134 [2020-10-28 09:22:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:21,246 INFO L225 Difference]: With dead ends: 710 [2020-10-28 09:22:21,246 INFO L226 Difference]: Without dead ends: 418 [2020-10-28 09:22:21,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 09:22:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-28 09:22:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2020-10-28 09:22:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-28 09:22:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 473 transitions. [2020-10-28 09:22:21,259 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 473 transitions. Word has length 134 [2020-10-28 09:22:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:21,260 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 473 transitions. [2020-10-28 09:22:21,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-28 09:22:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 473 transitions. [2020-10-28 09:22:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 09:22:21,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:21,261 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:21,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 09:22:21,261 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash -437874137, now seen corresponding path program 52 times [2020-10-28 09:22:21,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:21,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580984774] [2020-10-28 09:22:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1676 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 09:22:22,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:25,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:25,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:25,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:25,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:25,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-28 09:22:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:25,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:25,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:25,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:25,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3140 backedges. 2 proven. 3136 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:25,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580984774] [2020-10-28 09:22:25,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:25,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-28 09:22:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109962876] [2020-10-28 09:22:25,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-28 09:22:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-28 09:22:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:22:25,456 INFO L87 Difference]: Start difference. First operand 416 states and 473 transitions. Second operand 60 states. [2020-10-28 09:22:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:27,712 INFO L93 Difference]: Finished difference Result 722 states and 838 transitions. [2020-10-28 09:22:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 09:22:27,713 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 136 [2020-10-28 09:22:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:27,716 INFO L225 Difference]: With dead ends: 722 [2020-10-28 09:22:27,716 INFO L226 Difference]: Without dead ends: 425 [2020-10-28 09:22:27,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:22:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-28 09:22:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2020-10-28 09:22:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-10-28 09:22:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 481 transitions. [2020-10-28 09:22:27,732 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 481 transitions. Word has length 136 [2020-10-28 09:22:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:27,732 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 481 transitions. [2020-10-28 09:22:27,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-28 09:22:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 481 transitions. [2020-10-28 09:22:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-28 09:22:27,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:27,733 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:27,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 09:22:27,734 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:27,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1376376375, now seen corresponding path program 53 times [2020-10-28 09:22:27,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:27,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619332824] [2020-10-28 09:22:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:27,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:29,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:29,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 09:22:29,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:29,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1694 [2020-10-28 09:22:29,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:29,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-28 09:22:29,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:29,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 09:22:29,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:32,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:32,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:32,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:32,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:32,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-28 09:22:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:32,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:32,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:32,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:32,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:32,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:32,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:32,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:32,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:32,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 2 proven. 3249 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:32,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619332824] [2020-10-28 09:22:32,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:32,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-28 09:22:32,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859112179] [2020-10-28 09:22:32,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-28 09:22:32,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-28 09:22:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 09:22:32,047 INFO L87 Difference]: Start difference. First operand 423 states and 481 transitions. Second operand 61 states. [2020-10-28 09:22:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:34,936 INFO L93 Difference]: Finished difference Result 734 states and 852 transitions. [2020-10-28 09:22:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-28 09:22:34,937 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 138 [2020-10-28 09:22:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:34,939 INFO L225 Difference]: With dead ends: 734 [2020-10-28 09:22:34,939 INFO L226 Difference]: Without dead ends: 432 [2020-10-28 09:22:34,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 09:22:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-28 09:22:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2020-10-28 09:22:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-10-28 09:22:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 489 transitions. [2020-10-28 09:22:34,954 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 489 transitions. Word has length 138 [2020-10-28 09:22:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:34,954 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 489 transitions. [2020-10-28 09:22:34,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-28 09:22:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 489 transitions. [2020-10-28 09:22:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 09:22:34,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:34,955 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:34,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 09:22:34,956 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1333894933, now seen corresponding path program 54 times [2020-10-28 09:22:34,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:34,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228650678] [2020-10-28 09:22:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:36,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:36,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-28 09:22:36,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:36,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1680 [2020-10-28 09:22:36,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:36,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-28 09:22:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 09:22:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:39,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:39,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:39,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:39,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-28 09:22:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:39,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:39,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:39,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:39,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:39,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:39,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:39,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:39,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 2 proven. 3364 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:39,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228650678] [2020-10-28 09:22:39,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:39,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-28 09:22:39,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946035630] [2020-10-28 09:22:39,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-28 09:22:39,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:39,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-28 09:22:39,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 09:22:39,352 INFO L87 Difference]: Start difference. First operand 430 states and 489 transitions. Second operand 62 states. [2020-10-28 09:22:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:41,832 INFO L93 Difference]: Finished difference Result 746 states and 866 transitions. [2020-10-28 09:22:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 09:22:41,833 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 140 [2020-10-28 09:22:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:41,836 INFO L225 Difference]: With dead ends: 746 [2020-10-28 09:22:41,836 INFO L226 Difference]: Without dead ends: 439 [2020-10-28 09:22:41,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 09:22:41,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-28 09:22:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 437. [2020-10-28 09:22:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-28 09:22:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 497 transitions. [2020-10-28 09:22:41,849 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 497 transitions. Word has length 140 [2020-10-28 09:22:41,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:41,849 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 497 transitions. [2020-10-28 09:22:41,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-28 09:22:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 497 transitions. [2020-10-28 09:22:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-28 09:22:41,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:41,851 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:41,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 09:22:41,851 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash 836065165, now seen corresponding path program 55 times [2020-10-28 09:22:41,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:41,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398837452] [2020-10-28 09:22:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:41,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:43,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1863 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 09:22:43,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:46,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-28 09:22:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:46,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:46,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3485 backedges. 2 proven. 3481 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:46,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398837452] [2020-10-28 09:22:46,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:46,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-28 09:22:46,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480314438] [2020-10-28 09:22:46,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-28 09:22:46,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:46,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-28 09:22:46,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 09:22:46,524 INFO L87 Difference]: Start difference. First operand 437 states and 497 transitions. Second operand 63 states. [2020-10-28 09:22:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:49,578 INFO L93 Difference]: Finished difference Result 758 states and 880 transitions. [2020-10-28 09:22:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-28 09:22:49,579 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 142 [2020-10-28 09:22:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:49,581 INFO L225 Difference]: With dead ends: 758 [2020-10-28 09:22:49,581 INFO L226 Difference]: Without dead ends: 446 [2020-10-28 09:22:49,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 09:22:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-28 09:22:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2020-10-28 09:22:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-28 09:22:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 505 transitions. [2020-10-28 09:22:49,591 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 505 transitions. Word has length 142 [2020-10-28 09:22:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:49,592 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 505 transitions. [2020-10-28 09:22:49,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-28 09:22:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 505 transitions. [2020-10-28 09:22:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 09:22:49,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:49,593 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:49,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 09:22:49,593 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1186386513, now seen corresponding path program 56 times [2020-10-28 09:22:49,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:49,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020394863] [2020-10-28 09:22:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:51,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:51,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-28 09:22:51,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:51,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1845 [2020-10-28 09:22:51,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:51,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-28 09:22:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 09:22:51,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:54,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:54,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:54,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:54,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:54,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:54,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-10-28 09:22:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:54,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:54,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:54,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:54,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:54,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:54,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:54,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:54,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:54,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:22:54,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:54,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 2 proven. 3600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:22:54,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020394863] [2020-10-28 09:22:54,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:54,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-28 09:22:54,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619321262] [2020-10-28 09:22:54,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-28 09:22:54,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-28 09:22:54,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 09:22:54,352 INFO L87 Difference]: Start difference. First operand 444 states and 505 transitions. Second operand 64 states. [2020-10-28 09:22:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:57,556 INFO L93 Difference]: Finished difference Result 770 states and 894 transitions. [2020-10-28 09:22:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-28 09:22:57,556 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 144 [2020-10-28 09:22:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:57,558 INFO L225 Difference]: With dead ends: 770 [2020-10-28 09:22:57,558 INFO L226 Difference]: Without dead ends: 453 [2020-10-28 09:22:57,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 09:22:57,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-28 09:22:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2020-10-28 09:22:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-28 09:22:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 513 transitions. [2020-10-28 09:22:57,571 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 513 transitions. Word has length 144 [2020-10-28 09:22:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:57,571 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 513 transitions. [2020-10-28 09:22:57,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-28 09:22:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 513 transitions. [2020-10-28 09:22:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 09:22:57,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:57,573 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:57,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 09:22:57,573 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash 857736017, now seen corresponding path program 57 times [2020-10-28 09:22:57,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:57,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248795691] [2020-10-28 09:22:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:57,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:59,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:59,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 09:22:59,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1877 [2020-10-28 09:22:59,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:59,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-28 09:22:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:22:59,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 09:22:59,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:02,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:02,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:02,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:02,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:02,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:02,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:02,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:02,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:02,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-28 09:23:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:02,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:02,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:02,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:02,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 2 proven. 3721 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:02,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248795691] [2020-10-28 09:23:02,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:02,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-28 09:23:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971781346] [2020-10-28 09:23:02,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-28 09:23:02,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-28 09:23:02,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 09:23:02,452 INFO L87 Difference]: Start difference. First operand 451 states and 513 transitions. Second operand 65 states. [2020-10-28 09:23:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:05,694 INFO L93 Difference]: Finished difference Result 782 states and 908 transitions. [2020-10-28 09:23:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-28 09:23:05,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2020-10-28 09:23:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:05,697 INFO L225 Difference]: With dead ends: 782 [2020-10-28 09:23:05,697 INFO L226 Difference]: Without dead ends: 460 [2020-10-28 09:23:05,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 09:23:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-28 09:23:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 458. [2020-10-28 09:23:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-28 09:23:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 521 transitions. [2020-10-28 09:23:05,712 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 521 transitions. Word has length 146 [2020-10-28 09:23:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:05,712 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 521 transitions. [2020-10-28 09:23:05,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-28 09:23:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 521 transitions. [2020-10-28 09:23:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-28 09:23:05,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:05,713 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:05,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-28 09:23:05,713 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:05,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:05,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1835534221, now seen corresponding path program 58 times [2020-10-28 09:23:05,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:05,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083775281] [2020-10-28 09:23:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:07,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2063 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-28 09:23:07,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:10,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:10,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:10,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:10,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:10,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:10,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:10,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:10,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:10,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-28 09:23:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:10,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:10,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3848 backedges. 2 proven. 3844 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:10,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083775281] [2020-10-28 09:23:10,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:10,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-28 09:23:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585354816] [2020-10-28 09:23:10,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-28 09:23:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-28 09:23:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 09:23:10,886 INFO L87 Difference]: Start difference. First operand 458 states and 521 transitions. Second operand 66 states. [2020-10-28 09:23:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:13,572 INFO L93 Difference]: Finished difference Result 794 states and 922 transitions. [2020-10-28 09:23:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-28 09:23:13,573 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 148 [2020-10-28 09:23:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:13,576 INFO L225 Difference]: With dead ends: 794 [2020-10-28 09:23:13,576 INFO L226 Difference]: Without dead ends: 467 [2020-10-28 09:23:13,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 09:23:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-28 09:23:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2020-10-28 09:23:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-28 09:23:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 529 transitions. [2020-10-28 09:23:13,588 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 529 transitions. Word has length 148 [2020-10-28 09:23:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:13,588 INFO L481 AbstractCegarLoop]: Abstraction has 465 states and 529 transitions. [2020-10-28 09:23:13,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-28 09:23:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 529 transitions. [2020-10-28 09:23:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-28 09:23:13,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:13,590 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:13,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-28 09:23:13,590 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -202953451, now seen corresponding path program 59 times [2020-10-28 09:23:13,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:13,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781465602] [2020-10-28 09:23:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:13,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:15,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1971 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-28 09:23:15,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:18,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:18,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:18,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-28 09:23:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:18,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:18,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:18,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:18,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:18,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:18,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:18,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:18,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:18,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:18,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 2 proven. 3969 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:18,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781465602] [2020-10-28 09:23:18,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:18,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-28 09:23:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143924613] [2020-10-28 09:23:18,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-28 09:23:18,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-28 09:23:18,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 09:23:18,850 INFO L87 Difference]: Start difference. First operand 465 states and 529 transitions. Second operand 67 states. [2020-10-28 09:23:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:22,384 INFO L93 Difference]: Finished difference Result 806 states and 936 transitions. [2020-10-28 09:23:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-28 09:23:22,385 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 150 [2020-10-28 09:23:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:22,387 INFO L225 Difference]: With dead ends: 806 [2020-10-28 09:23:22,387 INFO L226 Difference]: Without dead ends: 474 [2020-10-28 09:23:22,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 09:23:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-28 09:23:22,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 472. [2020-10-28 09:23:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-10-28 09:23:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 537 transitions. [2020-10-28 09:23:22,399 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 537 transitions. Word has length 150 [2020-10-28 09:23:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:22,399 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 537 transitions. [2020-10-28 09:23:22,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-28 09:23:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 537 transitions. [2020-10-28 09:23:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 09:23:22,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:22,400 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:22,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-28 09:23:22,400 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:22,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1044103479, now seen corresponding path program 60 times [2020-10-28 09:23:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:22,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572656141] [2020-10-28 09:23:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:24,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:24,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 09:23:24,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:24,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1986 [2020-10-28 09:23:24,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:24,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:24,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-28 09:23:24,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:24,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-28 09:23:24,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:27,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:27,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:27,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:27,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:27,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:23:27,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:27,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:27,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:27,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-28 09:23:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:27,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:27,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:27,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:27,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 2 proven. 4096 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:27,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572656141] [2020-10-28 09:23:27,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:27,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-28 09:23:27,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792446060] [2020-10-28 09:23:27,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-28 09:23:27,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:27,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-28 09:23:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 09:23:27,705 INFO L87 Difference]: Start difference. First operand 472 states and 537 transitions. Second operand 68 states. [2020-10-28 09:23:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:23:30,702 INFO L93 Difference]: Finished difference Result 818 states and 950 transitions. [2020-10-28 09:23:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-28 09:23:30,703 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 152 [2020-10-28 09:23:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:23:30,705 INFO L225 Difference]: With dead ends: 818 [2020-10-28 09:23:30,705 INFO L226 Difference]: Without dead ends: 481 [2020-10-28 09:23:30,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 09:23:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-28 09:23:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 479. [2020-10-28 09:23:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-28 09:23:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 545 transitions. [2020-10-28 09:23:30,721 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 545 transitions. Word has length 152 [2020-10-28 09:23:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:23:30,721 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 545 transitions. [2020-10-28 09:23:30,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-28 09:23:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 545 transitions. [2020-10-28 09:23:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 09:23:30,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:23:30,722 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:23:30,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-28 09:23:30,722 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:23:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:23:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1169937625, now seen corresponding path program 61 times [2020-10-28 09:23:30,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:23:30,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346092726] [2020-10-28 09:23:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:23:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:32,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:32,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-28 09:23:32,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:32,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-28 09:23:32,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:32,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-28 09:23:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:23:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-28 09:23:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:36,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:23:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:36,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:36,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:36,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:23:36,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:36,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:23:36,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:36,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:36,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:23:36,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:36,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:36,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-28 09:23:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:23:36,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:23:36,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:23:36,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:23:36,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:23:36,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:23:36,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:23:36,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:23:36,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:23:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:23:36,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:23:36,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:23:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 2 proven. 4225 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:23:36,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346092726] [2020-10-28 09:23:36,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:23:36,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-28 09:23:36,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608197414] [2020-10-28 09:23:36,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-28 09:23:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:23:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-28 09:23:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 09:23:36,262 INFO L87 Difference]: Start difference. First operand 479 states and 545 transitions. Second operand 69 states.