/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=SHALLOWEST --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/loops-crafted-1/mono-crafted_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:50:00,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:50:00,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:50:00,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:50:00,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:50:00,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:50:00,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:50:00,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:50:00,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:50:00,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:50:00,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:50:00,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:50:00,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:50:00,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:50:00,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:50:00,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:50:00,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:50:00,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:50:00,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:50:00,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:50:00,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:50:00,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:50:00,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:50:00,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:50:00,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:50:00,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:50:00,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:50:00,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:50:00,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:50:00,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:50:00,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:50:00,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:50:00,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:50:00,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:50:00,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:50:00,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:50:00,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:50:00,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:50:00,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:50:00,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:50:00,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:50:00,907 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 [2020-10-27 01:50:00,967 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:50:00,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:50:00,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:50:00,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:50:00,970 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:50:00,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:50:00,971 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:50:00,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:50:00,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:50:00,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:50:00,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:50:00,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:50:00,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:50:00,973 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:50:00,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:50:00,974 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:50:00,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:50:00,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:50:00,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:50:00,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:50:00,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:50:00,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:50:00,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:50:00,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:50:00,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:50:00,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:50:00,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:50:00,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:50:00,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:50:00,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:50:01,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:50:01,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:50:01,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:50:01,462 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:50:01,463 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:50:01,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2020-10-27 01:50:01,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebac47e8d/5234e8fc8dcc4a4090a416b90d9d313f/FLAGd8c1abaf8 [2020-10-27 01:50:02,214 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:50:02,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2020-10-27 01:50:02,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebac47e8d/5234e8fc8dcc4a4090a416b90d9d313f/FLAGd8c1abaf8 [2020-10-27 01:50:02,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebac47e8d/5234e8fc8dcc4a4090a416b90d9d313f [2020-10-27 01:50:02,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:50:02,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:50:02,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:50:02,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:50:02,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:50:02,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b68e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02, skipping insertion in model container [2020-10-27 01:50:02,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:50:02,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:50:02,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:50:02,813 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:50:02,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:50:02,849 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:50:02,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02 WrapperNode [2020-10-27 01:50:02,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:50:02,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:50:02,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:50:02,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:50:02,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (1/1) ... [2020-10-27 01:50:02,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:50:02,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:50:02,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:50:02,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:50:02,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (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 [2020-10-27 01:50:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:50:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:50:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:50:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:50:02,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:50:02,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:50:02,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:50:02,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:50:02,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:50:02,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:50:02,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:50:02,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:50:02,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:50:02,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:50:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:50:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:50:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:50:03,416 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:50:03,417 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:50:03,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:50:03 BoogieIcfgContainer [2020-10-27 01:50:03,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:50:03,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:50:03,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:50:03,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:50:03,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:50:02" (1/3) ... [2020-10-27 01:50:03,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273d6c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:50:03, skipping insertion in model container [2020-10-27 01:50:03,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:50:02" (2/3) ... [2020-10-27 01:50:03,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273d6c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:50:03, skipping insertion in model container [2020-10-27 01:50:03,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:50:03" (3/3) ... [2020-10-27 01:50:03,431 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_11.c [2020-10-27 01:50:03,444 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:50:03,449 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:50:03,465 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:50:03,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:50:03,510 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:50:03,510 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:50:03,510 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:50:03,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:50:03,511 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:50:03,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:50:03,511 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:50:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 01:50:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:50:03,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:03,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:03,538 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1413113606, now seen corresponding path program 1 times [2020-10-27 01:50:03,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:03,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493416782] [2020-10-27 01:50:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:03,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:03,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:04,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:04,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:50:04,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:04,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-27 01:50:04,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:50:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:50:04,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:50:04,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:04,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:04,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:04,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:04,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:04,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:50:04,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:50:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:04,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493416782] [2020-10-27 01:50:04,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:50:04,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:50:04,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970730012] [2020-10-27 01:50:04,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:50:04,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:50:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:50:04,292 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-10-27 01:50:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:04,603 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-27 01:50:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:50:04,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 01:50:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:04,615 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:50:04,615 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:50:04,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:50:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:50:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:50:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:50:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:50:04,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 01:50:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:04,705 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:50:04,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:50:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:50:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:50:04,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:04,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:04,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:50:04,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1396654797, now seen corresponding path program 1 times [2020-10-27 01:50:04,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:04,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415422254] [2020-10-27 01:50:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:04,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:04,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:04,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:50:04,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:04,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 01:50:04,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:50:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:50:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:50:04,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:04,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:04,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:04,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:04,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:04,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:04,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:50:04,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:04,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:04,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:05,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415422254] [2020-10-27 01:50:05,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:50:05,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:50:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87804429] [2020-10-27 01:50:05,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:50:05,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:50:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:50:05,007 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 01:50:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:05,132 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 01:50:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:50:05,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 01:50:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:05,134 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:50:05,134 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:50:05,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:50:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:50:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 01:50:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:50:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:50:05,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-27 01:50:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:05,144 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:50:05,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:50:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:50:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:50:05,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:05,146 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:05,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:50:05,146 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1973580632, now seen corresponding path program 1 times [2020-10-27 01:50:05,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:05,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399981687] [2020-10-27 01:50:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:05,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:05,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:50:05,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:05,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-27 01:50:05,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:05,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:50:05,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:05,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:50:05,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:05,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:05,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:05,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:05,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:05,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:05,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:50:05,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:05,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:05,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:05,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:50:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:05,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399981687] [2020-10-27 01:50:05,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:05,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:50:05,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86511070] [2020-10-27 01:50:05,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:50:05,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:50:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:50:05,805 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 01:50:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:06,012 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-27 01:50:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:50:06,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:50:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:06,014 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:50:06,014 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:50:06,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:50:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:50:06,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:50:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:50:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:50:06,022 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-27 01:50:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:06,023 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:50:06,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:50:06,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:50:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:50:06,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:06,024 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:06,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:50:06,024 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1684428347, now seen corresponding path program 2 times [2020-10-27 01:50:06,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:06,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222720645] [2020-10-27 01:50:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:06,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:06,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:50:06,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:06,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-27 01:50:06,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:06,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:50:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:50:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:50:06,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:06,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:06,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:06,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:06,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:50:06,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:06,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:06,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:06,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:06,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:06,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222720645] [2020-10-27 01:50:06,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:06,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:50:06,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49316490] [2020-10-27 01:50:06,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:50:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:50:06,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:50:06,675 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-27 01:50:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:06,945 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:50:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:50:06,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:50:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:06,947 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:50:06,947 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:50:06,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:50:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:50:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:50:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:50:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 01:50:06,954 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-27 01:50:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:06,955 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 01:50:06,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:50:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 01:50:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:50:06,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:06,956 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:06,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:50:06,956 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1313010594, now seen corresponding path program 3 times [2020-10-27 01:50:06,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:06,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336388390] [2020-10-27 01:50:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:07,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:07,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:07,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:50:07,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:07,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 01:50:07,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:50:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:50:07,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:07,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:07,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:07,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:07,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:07,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:50:07,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:07,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:07,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:07,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:07,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336388390] [2020-10-27 01:50:07,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:07,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:50:07,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884132612] [2020-10-27 01:50:07,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:50:07,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:07,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:50:07,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:50:07,359 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-27 01:50:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:07,578 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 01:50:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:50:07,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:50:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:07,579 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:50:07,579 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:50:07,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:50:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:50:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:50:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:50:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 01:50:07,587 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-27 01:50:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:07,587 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 01:50:07,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:50:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 01:50:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:50:07,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:07,588 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:07,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:50:07,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 71222721, now seen corresponding path program 4 times [2020-10-27 01:50:07,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:07,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093852236] [2020-10-27 01:50:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:07,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:07,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:08,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:08,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:50:08,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:08,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-27 01:50:08,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:50:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:50:08,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:08,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:08,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:08,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:08,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:08,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:50:08,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:08,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:08,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:08,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:08,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:08,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093852236] [2020-10-27 01:50:08,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:08,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:50:08,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406814330] [2020-10-27 01:50:08,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:50:08,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:50:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:50:08,222 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-27 01:50:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:08,546 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 01:50:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:50:08,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:50:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:08,548 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:50:08,548 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:50:08,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:50:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:50:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:50:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:50:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 01:50:08,562 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-27 01:50:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:08,562 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 01:50:08,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:50:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 01:50:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:50:08,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:08,565 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:08,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:50:08,565 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:08,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1120423324, now seen corresponding path program 5 times [2020-10-27 01:50:08,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:08,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373892512] [2020-10-27 01:50:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:08,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:08,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:08,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:09,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:09,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:50:09,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:09,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-27 01:50:09,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:09,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:50:09,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:09,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:50:09,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:09,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:09,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:09,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:09,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:09,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:09,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:50:09,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:09,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373892512] [2020-10-27 01:50:09,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:09,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:50:09,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696050222] [2020-10-27 01:50:09,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:50:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:09,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:50:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:50:09,223 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-27 01:50:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:09,601 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 01:50:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:50:09,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:50:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:09,604 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:50:09,604 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:50:09,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:50:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:50:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:50:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:50:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 01:50:09,612 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-27 01:50:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:09,613 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 01:50:09,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:50:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 01:50:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:50:09,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:09,614 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:09,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:50:09,614 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:09,615 INFO L82 PathProgramCache]: Analyzing trace with hash 463995463, now seen corresponding path program 6 times [2020-10-27 01:50:09,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:09,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804964802] [2020-10-27 01:50:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:09,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:09,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:10,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:10,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:50:10,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:10,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-27 01:50:10,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:10,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:50:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:50:10,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:10,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:10,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:10,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:10,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:10,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:10,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:10,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804964802] [2020-10-27 01:50:10,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:10,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:50:10,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085185668] [2020-10-27 01:50:10,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:50:10,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:50:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:50:10,305 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-27 01:50:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:10,717 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 01:50:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:50:10,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:50:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:10,719 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:50:10,719 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:50:10,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:50:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:50:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:50:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:50:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 01:50:10,731 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-27 01:50:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:10,732 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 01:50:10,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:50:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 01:50:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:50:10,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:10,734 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:10,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:50:10,734 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1622940310, now seen corresponding path program 7 times [2020-10-27 01:50:10,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:10,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88460391] [2020-10-27 01:50:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:10,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:10,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:11,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:11,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:50:11,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-27 01:50:11,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:50:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:50:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:11,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:11,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:11,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:11,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:11,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:11,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:50:11,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:11,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:11,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:11,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88460391] [2020-10-27 01:50:11,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:11,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:50:11,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873780858] [2020-10-27 01:50:11,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:50:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:50:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:50:11,510 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-27 01:50:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:11,963 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:50:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:50:11,963 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 01:50:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:11,964 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:50:11,965 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:50:11,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:50:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:50:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:50:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:50:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 01:50:11,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-27 01:50:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:11,973 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 01:50:11,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:50:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 01:50:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:50:11,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:11,975 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:11,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:50:11,975 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1418490931, now seen corresponding path program 8 times [2020-10-27 01:50:11,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:11,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907271877] [2020-10-27 01:50:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:11,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:12,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:50:12,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:12,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-27 01:50:12,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:50:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:12,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:50:12,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:12,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:12,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:12,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:12,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:12,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:50:12,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:12,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:12,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:12,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907271877] [2020-10-27 01:50:12,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:12,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:50:12,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111595790] [2020-10-27 01:50:12,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:50:12,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:50:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:50:12,810 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-27 01:50:13,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:13,382 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-27 01:50:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:50:13,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:50:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:13,383 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:50:13,383 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:50:13,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:50:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:50:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:50:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:50:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 01:50:13,396 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-27 01:50:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:13,396 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 01:50:13,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:50:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 01:50:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:50:13,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:13,400 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:13,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:50:13,400 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1783833968, now seen corresponding path program 9 times [2020-10-27 01:50:13,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:13,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007496658] [2020-10-27 01:50:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:13,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:13,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:14,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:14,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:50:14,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:14,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-27 01:50:14,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:14,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:50:14,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:14,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:50:14,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:14,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:14,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:14,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:14,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:14,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:14,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:50:14,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:14,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:14,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:14,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007496658] [2020-10-27 01:50:14,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:14,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:50:14,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042922569] [2020-10-27 01:50:14,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:50:14,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:14,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:50:14,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:50:14,383 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-27 01:50:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:15,040 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 01:50:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:50:15,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 01:50:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:15,041 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:50:15,041 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:50:15,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:50:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:50:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:50:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:50:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 01:50:15,050 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-27 01:50:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:15,050 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 01:50:15,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:50:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 01:50:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:50:15,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:15,051 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:15,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:50:15,051 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash -273489325, now seen corresponding path program 10 times [2020-10-27 01:50:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:15,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517277929] [2020-10-27 01:50:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:15,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:15,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:15,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:15,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:15,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:50:15,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:15,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-27 01:50:15,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:50:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:15,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:50:15,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:16,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:16,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:16,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:16,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:16,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:50:16,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:16,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:16,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:16,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517277929] [2020-10-27 01:50:16,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:16,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:50:16,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098532748] [2020-10-27 01:50:16,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:50:16,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:50:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:50:16,230 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-27 01:50:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:16,995 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-27 01:50:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:50:16,997 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 01:50:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:16,998 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:50:16,998 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:50:16,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:50:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:50:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:50:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:50:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 01:50:17,007 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-27 01:50:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:17,007 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 01:50:17,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:50:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 01:50:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:50:17,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:17,008 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:17,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:50:17,009 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1676217738, now seen corresponding path program 11 times [2020-10-27 01:50:17,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:17,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439741522] [2020-10-27 01:50:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:17,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:17,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:17,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:50:17,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:17,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-27 01:50:17,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:50:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:17,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:50:17,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:50:18,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:18,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:18,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:18,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:18,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:18,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:50:18,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:18,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:18,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:18,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439741522] [2020-10-27 01:50:18,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:18,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:50:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884624283] [2020-10-27 01:50:18,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:50:18,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:50:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:50:18,231 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-27 01:50:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:19,016 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-27 01:50:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:50:19,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:50:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:19,018 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:50:19,018 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:50:19,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:50:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:50:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:50:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:50:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 01:50:19,027 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-27 01:50:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:19,027 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 01:50:19,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:50:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 01:50:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:50:19,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:19,028 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:19,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:50:19,028 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1078491687, now seen corresponding path program 12 times [2020-10-27 01:50:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:19,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561834913] [2020-10-27 01:50:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:19,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:19,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:19,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:20,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:20,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:50:20,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:20,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-27 01:50:20,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:20,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:50:20,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:20,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:50:20,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:20,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:20,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:20,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:20,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:20,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:20,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:20,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:20,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561834913] [2020-10-27 01:50:20,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:20,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:50:20,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488729936] [2020-10-27 01:50:20,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:50:20,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:50:20,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:50:20,354 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-27 01:50:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:21,263 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-27 01:50:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:50:21,263 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:50:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:21,264 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:50:21,264 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:50:21,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:50:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:50:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:50:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:50:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 01:50:21,273 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-27 01:50:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:21,274 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 01:50:21,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:50:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 01:50:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:50:21,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:21,275 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:21,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:50:21,275 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2105592956, now seen corresponding path program 13 times [2020-10-27 01:50:21,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:21,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186895905] [2020-10-27 01:50:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:21,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:21,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:22,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:22,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:50:22,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:22,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-27 01:50:22,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:50:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:22,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:50:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:22,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:22,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:22,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:22,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:22,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:50:22,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:22,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:22,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:22,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186895905] [2020-10-27 01:50:22,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:22,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:50:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562276669] [2020-10-27 01:50:22,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:50:22,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:50:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:50:22,785 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-27 01:50:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:23,719 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-27 01:50:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:50:23,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 01:50:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:23,720 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:50:23,720 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:50:23,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:50:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:50:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:50:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:50:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 01:50:23,730 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-27 01:50:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:23,730 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 01:50:23,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:50:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 01:50:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:50:23,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:23,731 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:23,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:50:23,731 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash -300747169, now seen corresponding path program 14 times [2020-10-27 01:50:23,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:23,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451543509] [2020-10-27 01:50:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:23,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:23,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:24,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:24,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:24,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:50:24,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:24,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-10-27 01:50:24,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:50:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:50:24,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:24,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:24,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:24,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:24,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:24,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:24,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:24,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:24,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:24,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:24,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:24,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451543509] [2020-10-27 01:50:24,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:24,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:50:24,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763450397] [2020-10-27 01:50:24,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:50:24,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:24,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:50:24,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:50:24,989 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-27 01:50:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:26,147 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-27 01:50:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:50:26,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-27 01:50:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:26,148 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:50:26,148 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:50:26,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:50:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:50:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:50:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:50:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-27 01:50:26,157 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-27 01:50:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:26,158 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-27 01:50:26,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:50:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-27 01:50:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:50:26,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:26,159 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:26,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:50:26,159 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2101202046, now seen corresponding path program 15 times [2020-10-27 01:50:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:26,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78659467] [2020-10-27 01:50:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:26,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:26,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:27,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:27,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:50:27,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:27,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-27 01:50:27,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:50:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:50:27,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:27,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:27,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:27,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:27,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:27,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:27,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:27,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:27,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:27,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:27,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78659467] [2020-10-27 01:50:27,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:27,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:50:27,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820318046] [2020-10-27 01:50:27,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:50:27,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:50:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:50:27,765 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-27 01:50:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:29,025 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-27 01:50:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:50:29,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 01:50:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:29,027 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:50:29,027 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:50:29,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:50:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:50:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:50:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:50:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 01:50:29,038 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-27 01:50:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:29,038 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 01:50:29,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:50:29,038 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 01:50:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:50:29,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:29,039 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:29,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:50:29,040 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:29,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:29,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1466518555, now seen corresponding path program 16 times [2020-10-27 01:50:29,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:29,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406767632] [2020-10-27 01:50:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:29,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:29,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:29,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:30,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:30,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:50:30,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:30,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-10-27 01:50:30,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:30,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:50:30,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:30,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:50:30,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:30,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:30,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:30,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:30,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:30,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:30,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:30,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:30,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406767632] [2020-10-27 01:50:30,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:30,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:50:30,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886729285] [2020-10-27 01:50:30,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:50:30,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:50:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:50:30,731 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-27 01:50:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:32,083 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-27 01:50:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:50:32,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-27 01:50:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:32,085 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:50:32,085 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:50:32,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:50:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:50:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:50:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:50:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 01:50:32,095 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-27 01:50:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:32,095 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 01:50:32,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:50:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 01:50:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:50:32,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:32,097 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:32,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:50:32,097 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:32,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1421039736, now seen corresponding path program 17 times [2020-10-27 01:50:32,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:32,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303919976] [2020-10-27 01:50:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:32,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:32,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:33,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:33,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:50:33,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:33,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1177 [2020-10-27 01:50:33,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:33,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:50:33,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:33,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:50:33,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:33,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:33,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:33,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:33,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:33,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:33,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:50:33,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:33,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:33,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:33,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:33,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:33,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303919976] [2020-10-27 01:50:33,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:33,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:50:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203243653] [2020-10-27 01:50:33,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:50:33,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:33,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:50:33,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:50:33,713 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-10-27 01:50:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:35,125 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-27 01:50:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:50:35,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-27 01:50:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:35,130 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:50:35,130 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:50:35,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:50:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:50:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:50:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:50:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 01:50:35,139 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-27 01:50:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:35,139 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 01:50:35,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:50:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 01:50:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:50:35,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:35,140 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:35,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:50:35,140 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash -665567637, now seen corresponding path program 18 times [2020-10-27 01:50:35,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:35,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330046573] [2020-10-27 01:50:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:36,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:36,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:50:36,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:36,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-27 01:50:36,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:36,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:50:36,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:36,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:50:36,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:37,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:37,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:37,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:37,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:37,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:37,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:37,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:37,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:37,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:37,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330046573] [2020-10-27 01:50:37,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:37,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:50:37,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442489604] [2020-10-27 01:50:37,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:50:37,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:37,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:50:37,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:50:37,055 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-27 01:50:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:38,698 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-27 01:50:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:50:38,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-27 01:50:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:38,699 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:50:38,699 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:50:38,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:50:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:50:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:50:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:50:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 01:50:38,722 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-27 01:50:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:38,722 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 01:50:38,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:50:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 01:50:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:50:38,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:38,725 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:38,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:50:38,726 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash -506353522, now seen corresponding path program 19 times [2020-10-27 01:50:38,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:38,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403054596] [2020-10-27 01:50:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:40,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:40,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:50:40,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1496 [2020-10-27 01:50:40,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:50:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:40,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:50:40,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:40,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:40,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:40,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:40,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:40,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:40,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:40,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:40,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403054596] [2020-10-27 01:50:40,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:40,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:50:40,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670490493] [2020-10-27 01:50:40,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:50:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:50:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:50:40,810 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-27 01:50:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:42,461 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 01:50:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:50:42,461 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 01:50:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:42,462 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:50:42,462 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:50:42,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:50:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:50:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:50:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:50:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-27 01:50:42,474 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-27 01:50:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:42,474 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-27 01:50:42,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:50:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-27 01:50:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:50:42,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:42,475 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:42,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:50:42,476 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2120411663, now seen corresponding path program 20 times [2020-10-27 01:50:42,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:42,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048281659] [2020-10-27 01:50:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:42,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:42,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:42,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:43,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:43,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:50:43,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:43,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-27 01:50:43,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:43,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:50:43,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:43,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:50:43,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:44,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:44,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:44,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:44,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:44,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:44,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:44,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:44,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:44,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:44,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:44,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048281659] [2020-10-27 01:50:44,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:44,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:50:44,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293055020] [2020-10-27 01:50:44,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:50:44,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:50:44,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:50:44,421 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 24 states. [2020-10-27 01:50:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:46,297 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-27 01:50:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:50:46,301 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-27 01:50:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:46,301 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:50:46,301 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:50:46,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:50:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:50:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:50:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:50:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 01:50:46,318 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-27 01:50:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:46,318 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 01:50:46,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:50:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 01:50:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:50:46,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:46,321 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:46,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:50:46,321 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:46,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1547875988, now seen corresponding path program 21 times [2020-10-27 01:50:46,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:46,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257547126] [2020-10-27 01:50:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:46,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:46,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:46,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:47,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:47,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:50:47,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:47,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1286 [2020-10-27 01:50:47,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:47,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:50:47,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:47,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:50:47,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:48,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:48,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:48,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:48,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:48,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:48,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:48,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257547126] [2020-10-27 01:50:48,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:48,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:50:48,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465870161] [2020-10-27 01:50:48,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:50:48,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:50:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:50:48,412 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 25 states. [2020-10-27 01:50:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:50,353 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-27 01:50:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:50:50,355 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-27 01:50:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:50,356 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:50:50,356 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:50:50,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:50:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:50:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:50:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:50:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-27 01:50:50,364 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-27 01:50:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:50,365 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-27 01:50:50,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:50:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-27 01:50:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:50:50,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:50,365 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:50,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:50:50,366 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:50,366 INFO L82 PathProgramCache]: Analyzing trace with hash 604158583, now seen corresponding path program 22 times [2020-10-27 01:50:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:50,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982790692] [2020-10-27 01:50:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:50,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:50,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:50,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:52,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:52,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:50:52,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-27 01:50:52,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:50:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:52,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:50:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:52,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:52,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:52,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:52,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:52,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:52,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:52,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:52,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:52,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:52,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:52,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982790692] [2020-10-27 01:50:52,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:52,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:50:52,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533033380] [2020-10-27 01:50:52,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:50:52,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:50:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:50:52,667 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 26 states. [2020-10-27 01:50:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:54,957 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-27 01:50:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:50:54,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-27 01:50:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:54,959 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:50:54,959 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:50:54,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:50:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:50:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:50:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:50:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 01:50:54,969 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-27 01:50:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:54,969 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 01:50:54,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:50:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 01:50:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:50:54,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:54,970 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:54,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:50:54,970 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash -70168166, now seen corresponding path program 23 times [2020-10-27 01:50:54,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:54,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825683213] [2020-10-27 01:50:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:54,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:55,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1329 [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:56,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:50:56,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:57,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:57,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:57,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:57,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:57,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:57,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:50:57,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:57,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:57,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825683213] [2020-10-27 01:50:57,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:57,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:50:57,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629417101] [2020-10-27 01:50:57,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:50:57,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:50:57,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:50:57,058 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-27 01:50:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:59,484 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-27 01:50:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:50:59,484 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-27 01:50:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:59,486 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:50:59,486 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:50:59,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:50:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:50:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 01:50:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:50:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 01:50:59,493 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-27 01:50:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:59,493 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 01:50:59,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:50:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 01:50:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:50:59,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:59,494 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:59,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:50:59,494 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash 441887741, now seen corresponding path program 24 times [2020-10-27 01:50:59,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:59,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449193875] [2020-10-27 01:50:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:59,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:59,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:51:00,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:01,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:01,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:01,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:01,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449193875] [2020-10-27 01:51:01,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:01,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:51:01,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815172440] [2020-10-27 01:51:01,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:51:01,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:51:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:51:01,753 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 28 states. [2020-10-27 01:51:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:04,312 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-27 01:51:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:51:04,313 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-27 01:51:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:04,314 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:51:04,314 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:51:04,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:51:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:51:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 01:51:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:51:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-27 01:51:04,323 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-27 01:51:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:04,323 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-27 01:51:04,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:51:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-27 01:51:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:51:04,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:04,324 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:04,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:51:04,324 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1393624672, now seen corresponding path program 25 times [2020-10-27 01:51:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:04,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094947537] [2020-10-27 01:51:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:04,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:05,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2001 [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:51:06,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:07,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:07,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:07,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:07,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:07,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:07,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:07,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:07,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094947537] [2020-10-27 01:51:07,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:07,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:51:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515174835] [2020-10-27 01:51:07,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:51:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:51:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:51:07,172 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 29 states. [2020-10-27 01:51:10,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:10,024 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-27 01:51:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:51:10,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-27 01:51:10,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:10,026 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:51:10,026 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:51:10,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:51:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:51:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:51:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:51:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 01:51:10,035 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-27 01:51:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:10,035 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 01:51:10,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:51:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 01:51:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:51:10,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:10,036 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:10,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:51:10,036 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -89494909, now seen corresponding path program 26 times [2020-10-27 01:51:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:10,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175564851] [2020-10-27 01:51:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:10,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:11,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:11,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:51:11,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:11,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1852 [2020-10-27 01:51:11,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:51:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:51:11,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:12,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:12,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:12,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:12,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:12,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:12,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:12,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:12,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175564851] [2020-10-27 01:51:12,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:12,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:51:12,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884427849] [2020-10-27 01:51:12,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:51:12,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:51:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:51:12,751 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 30 states. [2020-10-27 01:51:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:15,703 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-27 01:51:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:51:15,704 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-27 01:51:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:15,705 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:51:15,705 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:51:15,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:51:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:51:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 01:51:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:51:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-27 01:51:15,714 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-27 01:51:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:15,715 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-27 01:51:15,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:51:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-27 01:51:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:51:15,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:15,716 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:15,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:51:15,716 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:15,716 INFO L82 PathProgramCache]: Analyzing trace with hash -951243098, now seen corresponding path program 27 times [2020-10-27 01:51:15,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:15,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747030488] [2020-10-27 01:51:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:15,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:15,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:16,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:17,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1808 [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:51:17,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:18,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:18,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:18,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:18,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:18,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:18,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:18,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:18,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:18,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747030488] [2020-10-27 01:51:18,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:18,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:51:18,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799668539] [2020-10-27 01:51:18,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:51:18,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:18,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:51:18,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:51:18,446 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 31 states. [2020-10-27 01:51:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:21,564 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-27 01:51:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:51:21,565 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-27 01:51:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:21,566 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:51:21,566 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:51:21,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:51:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:51:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 01:51:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:51:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-27 01:51:21,576 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-27 01:51:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:21,576 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-27 01:51:21,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:51:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-27 01:51:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:51:21,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:21,577 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:21,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:51:21,577 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash -162564599, now seen corresponding path program 28 times [2020-10-27 01:51:21,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:21,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646821397] [2020-10-27 01:51:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:21,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:21,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:22,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:51:23,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:24,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:24,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:24,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:24,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:24,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:24,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:24,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:24,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:24,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:24,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:24,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646821397] [2020-10-27 01:51:24,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:24,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:51:24,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901810089] [2020-10-27 01:51:24,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:51:24,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:51:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:51:24,168 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-27 01:51:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:27,470 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-27 01:51:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:51:27,471 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-27 01:51:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:27,472 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:51:27,472 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:51:27,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:51:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:51:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:51:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:51:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 01:51:27,482 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-27 01:51:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:27,482 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 01:51:27,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:51:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 01:51:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:51:27,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:27,483 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:27,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:51:27,483 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:27,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1843228844, now seen corresponding path program 29 times [2020-10-27 01:51:27,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:27,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509406089] [2020-10-27 01:51:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:27,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:29,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2085 [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:51:29,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:30,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:30,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:30,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:30,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:30,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:30,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:30,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509406089] [2020-10-27 01:51:30,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:30,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:51:30,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351792677] [2020-10-27 01:51:30,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:51:30,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:30,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:51:30,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:51:30,626 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 33 states. [2020-10-27 01:51:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:34,143 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-27 01:51:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:51:34,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-27 01:51:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:34,145 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:51:34,145 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:51:34,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:51:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:51:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-27 01:51:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:51:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-27 01:51:34,154 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-27 01:51:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:34,154 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-27 01:51:34,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:51:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-27 01:51:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:51:34,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:34,155 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:34,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:51:34,155 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash 970411663, now seen corresponding path program 30 times [2020-10-27 01:51:34,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:34,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824020132] [2020-10-27 01:51:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:34,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:34,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:35,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:35,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:51:35,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:35,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1670 [2020-10-27 01:51:35,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:51:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:51:35,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:36,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:36,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:36,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:36,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824020132] [2020-10-27 01:51:36,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:36,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:51:36,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943505184] [2020-10-27 01:51:36,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:51:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:51:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:51:36,937 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-27 01:51:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:40,568 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-27 01:51:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:51:40,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-27 01:51:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:40,570 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:51:40,570 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:51:40,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:51:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:51:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-27 01:51:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:51:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 01:51:40,580 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-27 01:51:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:40,581 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 01:51:40,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:51:40,581 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 01:51:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:51:40,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:40,582 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:40,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:51:40,582 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:40,583 INFO L82 PathProgramCache]: Analyzing trace with hash -288276558, now seen corresponding path program 31 times [2020-10-27 01:51:40,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:40,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027120980] [2020-10-27 01:51:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:40,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:40,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:43,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:43,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:51:43,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:43,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-27 01:51:43,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:43,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:51:43,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:43,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:51:43,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:44,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:44,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:44,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:44,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027120980] [2020-10-27 01:51:44,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:44,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:51:44,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084483784] [2020-10-27 01:51:44,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:51:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:51:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:51:44,171 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 35 states. [2020-10-27 01:51:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:48,137 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-27 01:51:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:51:48,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-27 01:51:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:48,140 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:51:48,141 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:51:48,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:51:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:51:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 01:51:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:51:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-27 01:51:48,151 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-27 01:51:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:48,151 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-27 01:51:48,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:51:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-27 01:51:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:51:48,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:48,152 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:48,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:51:48,153 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1293120533, now seen corresponding path program 32 times [2020-10-27 01:51:48,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:48,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573106322] [2020-10-27 01:51:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:48,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:48,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:48,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:50,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:50,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:51:50,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:50,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2491 [2020-10-27 01:51:50,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:50,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:51:50,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:50,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:51:50,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:51,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:51,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:51,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:51,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:51,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:51,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:51,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573106322] [2020-10-27 01:51:51,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:51,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:51:51,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454409822] [2020-10-27 01:51:51,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:51:51,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:51:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:51:51,946 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 36 states. [2020-10-27 01:51:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:56,056 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-27 01:51:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:51:56,057 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-27 01:51:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:56,058 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:51:56,058 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:51:56,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:51:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:51:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 01:51:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:51:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 01:51:56,070 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-27 01:51:56,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:56,070 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 01:51:56,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:51:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 01:51:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:51:56,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:56,071 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:56,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:51:56,072 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 597302200, now seen corresponding path program 33 times [2020-10-27 01:51:56,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:56,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504860317] [2020-10-27 01:51:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:56,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:58,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 01:51:58,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:59,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:59,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:59,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:59,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:59,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:59,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:59,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:59,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:59,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:59,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:59,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504860317] [2020-10-27 01:51:59,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:59,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:51:59,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982836832] [2020-10-27 01:51:59,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:51:59,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:59,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:51:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:51:59,899 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 37 states. [2020-10-27 01:52:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:04,321 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-27 01:52:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:52:04,322 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-27 01:52:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:04,323 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:52:04,323 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:52:04,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:52:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:52:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 01:52:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:52:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-27 01:52:04,333 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-27 01:52:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:04,333 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-27 01:52:04,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:52:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-27 01:52:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:52:04,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:04,334 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:04,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:52:04,334 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1930782363, now seen corresponding path program 34 times [2020-10-27 01:52:04,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:04,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101706639] [2020-10-27 01:52:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:04,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:05,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:07,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:52:07,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:07,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3155 [2020-10-27 01:52:07,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:52:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 01:52:07,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:08,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:08,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:08,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:08,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:08,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101706639] [2020-10-27 01:52:08,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:08,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:52:08,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383166814] [2020-10-27 01:52:08,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:52:08,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:52:08,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:52:08,903 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-27 01:52:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:13,695 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-27 01:52:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:52:13,696 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-27 01:52:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:13,697 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:52:13,697 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:52:13,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:52:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:52:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 01:52:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:52:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-27 01:52:13,706 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-27 01:52:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:13,707 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-27 01:52:13,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:52:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-27 01:52:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:52:13,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:13,708 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:13,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:52:13,708 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash -790002498, now seen corresponding path program 35 times [2020-10-27 01:52:13,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:13,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069491089] [2020-10-27 01:52:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:13,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:13,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:15,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:16,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:16,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:52:16,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:16,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3246 [2020-10-27 01:52:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:52:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 01:52:16,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:18,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:18,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069491089] [2020-10-27 01:52:18,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:18,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:52:18,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659530971] [2020-10-27 01:52:18,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:52:18,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:52:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:52:18,407 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-27 01:52:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:23,318 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-27 01:52:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:52:23,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-27 01:52:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:23,320 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:52:23,321 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:52:23,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:52:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:52:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-27 01:52:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:52:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 01:52:23,330 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-27 01:52:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:23,330 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 01:52:23,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:52:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 01:52:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:52:23,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:23,332 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:23,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:52:23,332 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 170829345, now seen corresponding path program 36 times [2020-10-27 01:52:23,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:23,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987444542] [2020-10-27 01:52:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:23,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:23,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:24,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:26,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2933 [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 01:52:26,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:27,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:27,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:27,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:52:27,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:27,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987444542] [2020-10-27 01:52:27,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:27,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:52:27,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329182899] [2020-10-27 01:52:27,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:52:27,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:52:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:52:27,795 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-27 01:52:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:32,896 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-27 01:52:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:52:32,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-27 01:52:32,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:32,898 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:52:32,898 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:52:32,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:52:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:52:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-27 01:52:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:52:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-27 01:52:32,907 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-27 01:52:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:32,907 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-27 01:52:32,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:52:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-27 01:52:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:52:32,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:32,908 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:32,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:52:32,909 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash 112261828, now seen corresponding path program 37 times [2020-10-27 01:52:32,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:32,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906746292] [2020-10-27 01:52:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3385 [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 01:52:36,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:37,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:37,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:37,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:37,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:37,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906746292] [2020-10-27 01:52:37,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:37,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:52:37,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128103443] [2020-10-27 01:52:37,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:52:37,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:37,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:52:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:52:37,892 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 41 states. [2020-10-27 01:52:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:43,265 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-27 01:52:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:52:43,266 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-27 01:52:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:43,267 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:52:43,267 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:52:43,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:52:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:52:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 01:52:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:52:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-27 01:52:43,277 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-27 01:52:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:43,278 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-27 01:52:43,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:52:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-27 01:52:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:52:43,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:43,279 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:43,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:52:43,279 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:43,280 INFO L82 PathProgramCache]: Analyzing trace with hash -336547161, now seen corresponding path program 38 times [2020-10-27 01:52:43,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:43,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911645258] [2020-10-27 01:52:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:43,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:44,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:44,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3559 [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:46,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 01:52:46,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:48,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:48,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:48,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:48,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:48,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:48,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:52:48,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:48,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:48,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:48,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911645258] [2020-10-27 01:52:48,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:48,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:52:48,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217826156] [2020-10-27 01:52:48,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:52:48,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:48,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:52:48,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:52:48,513 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 42 states. [2020-10-27 01:52:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:54,183 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-27 01:52:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:52:54,184 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-27 01:52:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:54,185 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:52:54,186 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:52:54,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:52:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:52:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-27 01:52:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:52:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-27 01:52:54,196 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-27 01:52:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:54,196 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-27 01:52:54,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:52:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-27 01:52:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:52:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:54,197 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:54,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:52:54,198 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2145255990, now seen corresponding path program 39 times [2020-10-27 01:52:54,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:54,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545580970] [2020-10-27 01:52:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:55,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:55,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:59,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4879 [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 01:52:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:00,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:00,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:00,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:00,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:00,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:53:00,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:00,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:00,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:00,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545580970] [2020-10-27 01:53:00,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:00,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:53:00,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984827221] [2020-10-27 01:53:00,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:53:00,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:53:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:53:00,838 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 43 states. [2020-10-27 01:53:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:06,948 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-27 01:53:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:53:06,949 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-27 01:53:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:06,950 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:53:06,951 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:53:06,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:53:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:53:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 01:53:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:53:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-27 01:53:06,962 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-27 01:53:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:06,962 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-27 01:53:06,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:53:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-27 01:53:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 01:53:06,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:06,964 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:06,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:53:06,965 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -852685779, now seen corresponding path program 40 times [2020-10-27 01:53:06,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:06,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165592634] [2020-10-27 01:53:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:07,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:08,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:08,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:11,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:11,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:53:11,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:11,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4576 [2020-10-27 01:53:11,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:11,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:53:11,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:11,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 01:53:11,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:13,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:13,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:13,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:13,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:13,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:13,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:53:13,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:13,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:13,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:13,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:13,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:13,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165592634] [2020-10-27 01:53:13,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:13,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:53:13,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991436722] [2020-10-27 01:53:13,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:53:13,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:53:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:53:13,441 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 44 states. [2020-10-27 01:53:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:19,781 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-27 01:53:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:53:19,782 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-27 01:53:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:19,783 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:53:19,783 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:53:19,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:53:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:53:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:53:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:53:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 01:53:19,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-27 01:53:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:19,794 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 01:53:19,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:53:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 01:53:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:53:19,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:19,795 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:19,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:53:19,795 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:19,796 INFO L82 PathProgramCache]: Analyzing trace with hash 61738448, now seen corresponding path program 41 times [2020-10-27 01:53:19,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:19,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404000503] [2020-10-27 01:53:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:19,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:21,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:24,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4864 [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 01:53:24,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:26,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:26,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404000503] [2020-10-27 01:53:26,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:26,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:53:26,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764015344] [2020-10-27 01:53:26,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:53:26,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:53:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:53:26,615 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 45 states. [2020-10-27 01:53:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:33,135 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-27 01:53:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:53:33,136 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-27 01:53:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:33,138 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:53:33,138 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:53:33,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:53:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:53:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 01:53:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:53:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-27 01:53:33,148 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-27 01:53:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:33,148 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-27 01:53:33,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:53:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-27 01:53:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 01:53:33,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:33,149 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:33,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:53:33,149 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:33,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1644875085, now seen corresponding path program 42 times [2020-10-27 01:53:33,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:33,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671120586] [2020-10-27 01:53:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:33,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:34,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4588 [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 01:53:37,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:39,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:39,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:39,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:53:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671120586] [2020-10-27 01:53:39,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:39,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:53:39,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342130511] [2020-10-27 01:53:39,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:53:39,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:39,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:53:39,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:53:39,832 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-27 01:53:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:46,793 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-27 01:53:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:53:46,794 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-27 01:53:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:46,796 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:53:46,796 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:53:46,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:53:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:53:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-27 01:53:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:53:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-27 01:53:46,806 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-27 01:53:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:46,806 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-27 01:53:46,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:53:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-27 01:53:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:53:46,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:46,807 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:46,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:53:46,807 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1022973226, now seen corresponding path program 43 times [2020-10-27 01:53:46,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:46,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694875203] [2020-10-27 01:53:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:46,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:48,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:51,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:51,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:53:51,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:53:51,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4660 [2020-10-27 01:53:51,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:51,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:53:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:53:51,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0