/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:11:24,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:11:24,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:11:24,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:11:24,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:11:24,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:11:24,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:11:24,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:11:24,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:11:24,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:11:24,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:11:24,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:11:24,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:11:24,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:11:24,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:11:24,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:11:24,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:11:24,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:11:24,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:11:24,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:11:24,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:11:24,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:11:24,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:11:24,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:11:24,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:11:24,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:11:24,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:11:24,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:11:24,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:11:24,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:11:24,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:11:24,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:11:24,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:11:24,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:11:24,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:11:24,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:11:24,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:11:24,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:11:24,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:11:24,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:11:24,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:11:24,855 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 14:11:24,883 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:11:24,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:11:24,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:11:24,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:11:24,886 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:11:24,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:11:24,886 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:11:24,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:11:24,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:11:24,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:11:24,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:11:24,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:11:24,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:11:24,888 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:11:24,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:11:24,888 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:11:24,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:11:24,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:11:24,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:11:24,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:11:24,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:11:24,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:11:24,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:11:24,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:11:24,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:11:24,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:11:24,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:11:24,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:11:24,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:11:24,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:11:25,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:11:25,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:11:25,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:11:25,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:11:25,363 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:11:25,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-27 14:11:25,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/630ecf8b1/b5ada14820b64ec79912c5c318b2edbc/FLAG4f8b949f1 [2020-10-27 14:11:26,175 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:11:26,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-27 14:11:26,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/630ecf8b1/b5ada14820b64ec79912c5c318b2edbc/FLAG4f8b949f1 [2020-10-27 14:11:26,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/630ecf8b1/b5ada14820b64ec79912c5c318b2edbc [2020-10-27 14:11:26,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:11:26,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:11:26,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:11:26,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:11:26,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:11:26,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc1cecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26, skipping insertion in model container [2020-10-27 14:11:26,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:11:26,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:11:26,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:11:26,784 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:11:26,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:11:26,829 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:11:26,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26 WrapperNode [2020-10-27 14:11:26,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:11:26,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:11:26,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:11:26,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:11:26,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:11:26,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:11:26,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:11:26,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:11:26,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (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 14:11:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:11:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:11:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:11:26,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:11:26,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:11:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:11:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:11:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:11:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:11:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:11:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:11:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:11:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:11:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:11:26,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:11:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:11:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:11:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:11:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:11:26,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:11:27,350 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:11:27,350 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 14:11:27,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:11:27 BoogieIcfgContainer [2020-10-27 14:11:27,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:11:27,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:11:27,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:11:27,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:11:27,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:11:26" (1/3) ... [2020-10-27 14:11:27,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f53d3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:11:27, skipping insertion in model container [2020-10-27 14:11:27,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (2/3) ... [2020-10-27 14:11:27,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f53d3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:11:27, skipping insertion in model container [2020-10-27 14:11:27,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:11:27" (3/3) ... [2020-10-27 14:11:27,361 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2020-10-27 14:11:27,374 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:11:27,379 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:11:27,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:11:27,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:11:27,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:11:27,422 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:11:27,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:11:27,422 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:11:27,423 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:11:27,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:11:27,423 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:11:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-27 14:11:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:11:27,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:27,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:27,450 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:27,458 INFO L82 PathProgramCache]: Analyzing trace with hash 820387366, now seen corresponding path program 1 times [2020-10-27 14:11:27,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:27,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113625159] [2020-10-27 14:11:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:27,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:27,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:28,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:28,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:11:28,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:28,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-27 14:11:28,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:11:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:28,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:11:28,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:28,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:28,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:28,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:28,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:11:28,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:28,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:28,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:28,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:28,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:11:28,530 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 14:11:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113625159] [2020-10-27 14:11:28,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:28,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:11:28,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891962096] [2020-10-27 14:11:28,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:11:28,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:11:28,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:11:28,568 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-27 14:11:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:28,754 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2020-10-27 14:11:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:11:28,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-27 14:11:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:28,768 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:11:28,768 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:11:28,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:11:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:11:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 14:11:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:11:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-27 14:11:28,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2020-10-27 14:11:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:28,843 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-27 14:11:28,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:11:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-27 14:11:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:11:28,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:28,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:28,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:11:28,848 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1435305744, now seen corresponding path program 1 times [2020-10-27 14:11:28,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:28,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554258166] [2020-10-27 14:11:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:29,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:29,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:11:29,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-27 14:11:29,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:11:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:11:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:11:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:29,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:29,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:29,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:29,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:29,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:11:29,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:29,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:29,497 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 14:11:29,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554258166] [2020-10-27 14:11:29,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:29,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:11:29,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874320787] [2020-10-27 14:11:29,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:11:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:11:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:11:29,502 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 4 states. [2020-10-27 14:11:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:29,628 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-10-27 14:11:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:11:29,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 14:11:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:29,631 INFO L225 Difference]: With dead ends: 66 [2020-10-27 14:11:29,631 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:11:29,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:11:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:11:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-27 14:11:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:11:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-10-27 14:11:29,642 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 19 [2020-10-27 14:11:29,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:29,643 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-10-27 14:11:29,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:11:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-10-27 14:11:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:11:29,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:29,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:29,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:11:29,645 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash -4092729, now seen corresponding path program 1 times [2020-10-27 14:11:29,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:29,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061167579] [2020-10-27 14:11:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:29,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:29,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:29,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:30,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:30,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:11:30,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:30,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-27 14:11:30,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:11:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:11:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:11:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:30,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:30,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:30,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:30,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:30,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:11:30,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:30,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:31,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:31,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:11:31,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061167579] [2020-10-27 14:11:31,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:31,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:11:31,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689281769] [2020-10-27 14:11:31,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:11:31,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:11:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:11:31,034 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 5 states. [2020-10-27 14:11:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:31,239 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-10-27 14:11:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:11:31,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:11:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:31,241 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:11:31,241 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:11:31,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:11:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:11:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-27 14:11:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:11:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-27 14:11:31,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2020-10-27 14:11:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:31,252 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-27 14:11:31,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:11:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-27 14:11:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:11:31,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:31,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:31,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:11:31,254 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash 364493740, now seen corresponding path program 2 times [2020-10-27 14:11:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:31,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574540714] [2020-10-27 14:11:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:34,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:11:34,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:34,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3378 [2020-10-27 14:11:34,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:34,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:11:34,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:11:34,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:11:34,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:34,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:34,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:11:34,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:34,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:34,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:34,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:34,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:11:34,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574540714] [2020-10-27 14:11:34,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:34,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:11:34,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657598848] [2020-10-27 14:11:34,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:11:34,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:34,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:11:34,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:11:34,718 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 6 states. [2020-10-27 14:11:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:34,857 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2020-10-27 14:11:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:11:34,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 14:11:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:34,859 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:11:34,859 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:11:34,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:11:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:11:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-27 14:11:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:11:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-10-27 14:11:34,869 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 29 [2020-10-27 14:11:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:34,869 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-10-27 14:11:34,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:11:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-10-27 14:11:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:11:34,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:34,871 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:34,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:11:34,871 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash -603824085, now seen corresponding path program 3 times [2020-10-27 14:11:34,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:34,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262867591] [2020-10-27 14:11:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:39,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:39,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 14:11:39,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:39,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:11:39,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:39,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:11:39,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:11:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:11:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:39,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:39,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:39,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:39,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:39,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:11:39,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:39,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:39,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:11:39,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262867591] [2020-10-27 14:11:39,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:39,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:11:39,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205770400] [2020-10-27 14:11:39,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:11:39,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:11:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:11:39,991 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 7 states. [2020-10-27 14:11:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:40,203 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2020-10-27 14:11:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:11:40,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-27 14:11:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:40,204 INFO L225 Difference]: With dead ends: 93 [2020-10-27 14:11:40,205 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:11:40,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:11:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:11:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-27 14:11:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:11:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-10-27 14:11:40,222 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 34 [2020-10-27 14:11:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:40,223 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-10-27 14:11:40,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:11:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-10-27 14:11:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:11:40,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:40,229 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:40,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:11:40,229 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1788137544, now seen corresponding path program 4 times [2020-10-27 14:11:40,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:40,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636880334] [2020-10-27 14:11:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:40,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:40,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:40,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:45,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:45,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:11:45,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:11:45,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:11:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:11:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:11:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:45,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:45,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:45,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:45,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:45,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:11:45,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:45,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:45,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:11:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:11:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636880334] [2020-10-27 14:11:45,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:45,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:11:45,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811041649] [2020-10-27 14:11:45,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:11:45,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:11:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:11:45,374 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 8 states. [2020-10-27 14:11:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:45,552 INFO L93 Difference]: Finished difference Result 103 states and 136 transitions. [2020-10-27 14:11:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:11:45,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-27 14:11:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:45,555 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:11:45,556 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:11:45,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:11:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:11:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-27 14:11:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:11:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2020-10-27 14:11:45,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 39 [2020-10-27 14:11:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:45,572 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2020-10-27 14:11:45,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:11:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2020-10-27 14:11:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:11:45,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:45,574 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:45,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:11:45,576 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:45,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1464988559, now seen corresponding path program 5 times [2020-10-27 14:11:45,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:45,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185138358] [2020-10-27 14:11:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:45,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:45,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:45,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:50,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:50,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:11:50,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:50,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:11:50,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:50,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:11:50,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:11:50,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:11:50,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:50,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:50,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:50,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:50,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:50,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:11:50,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:50,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:50,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:50,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:50,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:11:50,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185138358] [2020-10-27 14:11:50,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:50,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:11:50,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570355266] [2020-10-27 14:11:50,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:11:50,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:50,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:11:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:11:50,711 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand 9 states. [2020-10-27 14:11:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:50,893 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2020-10-27 14:11:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:11:50,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-27 14:11:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:50,896 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:11:50,896 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:11:50,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:11:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:11:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-27 14:11:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:11:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-10-27 14:11:50,913 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 44 [2020-10-27 14:11:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:50,913 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-10-27 14:11:50,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:11:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-10-27 14:11:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:11:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:50,917 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:50,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:11:50,917 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash 12846308, now seen corresponding path program 6 times [2020-10-27 14:11:50,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:50,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080818914] [2020-10-27 14:11:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:50,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:50,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:51,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:55,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:55,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:11:55,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:55,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:11:55,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:55,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:11:55,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:11:55,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:11:55,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:56,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:56,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:56,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:56,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:56,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:56,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:11:56,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:56,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:56,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:56,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:56,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:11:56,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080818914] [2020-10-27 14:11:56,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:56,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:11:56,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187899482] [2020-10-27 14:11:56,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:11:56,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:56,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:11:56,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:11:56,101 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 10 states. [2020-10-27 14:11:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:56,304 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2020-10-27 14:11:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:11:56,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-27 14:11:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:56,305 INFO L225 Difference]: With dead ends: 123 [2020-10-27 14:11:56,306 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:11:56,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:11:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:11:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-27 14:11:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:11:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-27 14:11:56,317 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 49 [2020-10-27 14:11:56,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:56,317 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-27 14:11:56,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:11:56,318 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-27 14:11:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:11:56,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:56,318 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:56,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:11:56,319 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash 961185523, now seen corresponding path program 7 times [2020-10-27 14:11:56,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:56,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127637890] [2020-10-27 14:11:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:57,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:01,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:01,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:12:01,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:12:01,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:12:01,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:01,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:12:01,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:12:01,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:12:01,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:01,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:01,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:01,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:01,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:12:01,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:01,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:12:01,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127637890] [2020-10-27 14:12:01,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:01,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:12:01,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183058688] [2020-10-27 14:12:01,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:12:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:12:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:12:01,494 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 11 states. [2020-10-27 14:12:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:01,707 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2020-10-27 14:12:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:12:01,708 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-27 14:12:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:01,709 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:12:01,709 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 14:12:01,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:12:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 14:12:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-27 14:12:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:12:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-10-27 14:12:01,722 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 54 [2020-10-27 14:12:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:01,722 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-10-27 14:12:01,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:12:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-10-27 14:12:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:12:01,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:01,723 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:01,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:12:01,723 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1668094336, now seen corresponding path program 8 times [2020-10-27 14:12:01,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:01,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351457101] [2020-10-27 14:12:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:01,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:01,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:03,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:06,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:06,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:12:06,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:12:06,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:12:06,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:12:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:12:06,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:12:06,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:06,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:06,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:06,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:12:06,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:06,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:06,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:12:06,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351457101] [2020-10-27 14:12:06,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:06,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:12:06,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526317922] [2020-10-27 14:12:06,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:12:06,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:07,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:12:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:12:07,000 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-10-27 14:12:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:07,301 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2020-10-27 14:12:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:12:07,302 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-27 14:12:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:07,303 INFO L225 Difference]: With dead ends: 143 [2020-10-27 14:12:07,304 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:12:07,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:12:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:12:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-27 14:12:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 14:12:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-10-27 14:12:07,312 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 59 [2020-10-27 14:12:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:07,312 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-10-27 14:12:07,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:12:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-10-27 14:12:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:12:07,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:07,314 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:07,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:12:07,314 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:07,315 INFO L82 PathProgramCache]: Analyzing trace with hash -586786217, now seen corresponding path program 9 times [2020-10-27 14:12:07,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:07,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273999922] [2020-10-27 14:12:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:07,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:08,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:12,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:12,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:12:12,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:12:12,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:12:12,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:12:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:12:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:12:12,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:12,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:12,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:12,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:12,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:12,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:12:12,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:12,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:12,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:12,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:12,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:12:12,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273999922] [2020-10-27 14:12:12,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:12,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:12:12,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730271353] [2020-10-27 14:12:12,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:12:12,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:12:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:12:12,525 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 13 states. [2020-10-27 14:12:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:12,825 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2020-10-27 14:12:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:12:12,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-27 14:12:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:12,827 INFO L225 Difference]: With dead ends: 153 [2020-10-27 14:12:12,828 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 14:12:12,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:12:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 14:12:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-27 14:12:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:12:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2020-10-27 14:12:12,836 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 64 [2020-10-27 14:12:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:12,836 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2020-10-27 14:12:12,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:12:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2020-10-27 14:12:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:12:12,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:12,838 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:12,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:12:12,838 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash 406179356, now seen corresponding path program 10 times [2020-10-27 14:12:12,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:12,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207369433] [2020-10-27 14:12:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:12,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:17,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:17,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:12:17,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:12:17,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:12:17,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:12:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:12:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:12:17,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:18,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:18,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:18,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:18,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:18,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:18,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:12:18,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:18,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:12:18,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207369433] [2020-10-27 14:12:18,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:18,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:12:18,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660684521] [2020-10-27 14:12:18,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:12:18,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:12:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:12:18,063 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 14 states. [2020-10-27 14:12:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:18,286 INFO L93 Difference]: Finished difference Result 163 states and 220 transitions. [2020-10-27 14:12:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:12:18,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-27 14:12:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:18,287 INFO L225 Difference]: With dead ends: 163 [2020-10-27 14:12:18,287 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 14:12:18,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:12:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 14:12:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-27 14:12:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 14:12:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 124 transitions. [2020-10-27 14:12:18,295 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 124 transitions. Word has length 69 [2020-10-27 14:12:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:18,295 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 124 transitions. [2020-10-27 14:12:18,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:12:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 124 transitions. [2020-10-27 14:12:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 14:12:18,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:18,297 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:18,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:12:18,297 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash 354397627, now seen corresponding path program 11 times [2020-10-27 14:12:18,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:18,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365701434] [2020-10-27 14:12:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:18,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:18,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:21,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:23,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:12:23,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:23,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:23,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:23,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:23,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:23,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:23,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:12:23,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:23,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:23,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:23,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 14:12:23,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365701434] [2020-10-27 14:12:23,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:23,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:12:23,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896633098] [2020-10-27 14:12:23,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:12:23,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:12:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:12:23,575 INFO L87 Difference]: Start difference. First operand 96 states and 124 transitions. Second operand 15 states. [2020-10-27 14:12:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:24,008 INFO L93 Difference]: Finished difference Result 173 states and 234 transitions. [2020-10-27 14:12:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:12:24,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-27 14:12:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:24,011 INFO L225 Difference]: With dead ends: 173 [2020-10-27 14:12:24,011 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:12:24,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:12:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:12:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-27 14:12:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 14:12:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-10-27 14:12:24,034 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 74 [2020-10-27 14:12:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:24,034 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-10-27 14:12:24,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:12:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-10-27 14:12:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:12:24,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:24,036 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:24,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:12:24,037 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1153178952, now seen corresponding path program 12 times [2020-10-27 14:12:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:24,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597650311] [2020-10-27 14:12:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:24,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:27,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:29,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:29,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:12:29,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:12:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:12:29,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:12:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:12:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:12:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:29,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:29,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:29,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:29,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:29,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:12:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:12:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:12:29,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597650311] [2020-10-27 14:12:29,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:29,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:12:29,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53783469] [2020-10-27 14:12:29,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:12:29,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:29,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:12:29,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:12:29,376 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 16 states. [2020-10-27 14:12:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:29,741 INFO L93 Difference]: Finished difference Result 183 states and 248 transitions. [2020-10-27 14:12:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:12:29,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-27 14:12:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:29,743 INFO L225 Difference]: With dead ends: 183 [2020-10-27 14:12:29,743 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:12:29,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:12:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:12:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-27 14:12:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:12:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2020-10-27 14:12:29,752 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 79 [2020-10-27 14:12:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:29,752 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2020-10-27 14:12:29,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:12:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2020-10-27 14:12:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:12:29,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:29,755 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:29,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:12:29,755 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash 263242015, now seen corresponding path program 13 times [2020-10-27 14:12:29,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:29,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011367253] [2020-10-27 14:12:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:29,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:29,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:34,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:12:34,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:35,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:35,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:35,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:35,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:35,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:35,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:12:35,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:35,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:35,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:35,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:35,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 14:12:35,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011367253] [2020-10-27 14:12:35,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:35,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:12:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975831812] [2020-10-27 14:12:35,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:12:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:12:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:12:35,034 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand 17 states. [2020-10-27 14:12:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:35,371 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2020-10-27 14:12:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:12:35,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 84 [2020-10-27 14:12:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:35,373 INFO L225 Difference]: With dead ends: 193 [2020-10-27 14:12:35,373 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 14:12:35,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:12:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 14:12:35,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-27 14:12:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 14:12:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 148 transitions. [2020-10-27 14:12:35,389 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 148 transitions. Word has length 84 [2020-10-27 14:12:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:35,389 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 148 transitions. [2020-10-27 14:12:35,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:12:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 148 transitions. [2020-10-27 14:12:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:12:35,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:35,391 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:35,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:12:35,391 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash 456988500, now seen corresponding path program 14 times [2020-10-27 14:12:35,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:35,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032614118] [2020-10-27 14:12:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:35,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:40,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:40,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:12:40,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:12:40,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:12:40,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:12:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:12:40,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:12:40,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:40,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:40,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:40,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:40,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:40,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:12:40,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:40,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:40,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:40,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 14:12:40,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032614118] [2020-10-27 14:12:40,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:40,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:12:40,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053111914] [2020-10-27 14:12:40,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:12:40,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:40,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:12:40,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:12:40,708 INFO L87 Difference]: Start difference. First operand 114 states and 148 transitions. Second operand 18 states. [2020-10-27 14:12:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:41,052 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2020-10-27 14:12:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:12:41,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 89 [2020-10-27 14:12:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:41,054 INFO L225 Difference]: With dead ends: 203 [2020-10-27 14:12:41,054 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 14:12:41,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:12:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 14:12:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-27 14:12:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 14:12:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2020-10-27 14:12:41,061 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 89 [2020-10-27 14:12:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:41,062 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2020-10-27 14:12:41,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:12:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2020-10-27 14:12:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 14:12:41,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:41,063 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:41,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:12:41,063 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 978572419, now seen corresponding path program 15 times [2020-10-27 14:12:41,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:41,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661133360] [2020-10-27 14:12:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:41,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:46,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:46,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 14:12:46,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:12:46,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:12:46,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:12:46,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:12:46,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:12:46,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:46,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:46,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:46,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:46,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:46,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:46,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:12:46,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 14:12:46,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661133360] [2020-10-27 14:12:46,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:46,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:12:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435565017] [2020-10-27 14:12:46,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:12:46,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:46,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:12:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:12:46,431 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand 19 states. [2020-10-27 14:12:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:46,818 INFO L93 Difference]: Finished difference Result 213 states and 290 transitions. [2020-10-27 14:12:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:12:46,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-10-27 14:12:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:46,820 INFO L225 Difference]: With dead ends: 213 [2020-10-27 14:12:46,820 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 14:12:46,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:12:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 14:12:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-10-27 14:12:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 14:12:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2020-10-27 14:12:46,827 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 94 [2020-10-27 14:12:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:46,828 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2020-10-27 14:12:46,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:12:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2020-10-27 14:12:46,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:12:46,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:46,829 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:46,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:12:46,829 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1430727664, now seen corresponding path program 16 times [2020-10-27 14:12:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:46,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696804002] [2020-10-27 14:12:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:46,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:12:51,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:52,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:52,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:52,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 14:12:52,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696804002] [2020-10-27 14:12:52,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:52,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:12:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276295336] [2020-10-27 14:12:52,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:12:52,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:52,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:12:52,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:12:52,189 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand 20 states. [2020-10-27 14:12:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:52,605 INFO L93 Difference]: Finished difference Result 223 states and 304 transitions. [2020-10-27 14:12:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:12:52,605 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-27 14:12:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:52,607 INFO L225 Difference]: With dead ends: 223 [2020-10-27 14:12:52,607 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:12:52,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:12:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:12:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-27 14:12:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:12:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2020-10-27 14:12:52,615 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 99 [2020-10-27 14:12:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:52,615 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2020-10-27 14:12:52,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:12:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2020-10-27 14:12:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 14:12:52,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:52,617 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:52,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:12:52,617 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:52,618 INFO L82 PathProgramCache]: Analyzing trace with hash 639838183, now seen corresponding path program 17 times [2020-10-27 14:12:52,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:52,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124516438] [2020-10-27 14:12:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:52,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:57,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:12:57,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:57,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:57,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:57,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:57,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:57,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:57,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:12:57,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:57,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:57,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 14:12:57,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124516438] [2020-10-27 14:12:57,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:57,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:12:57,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046462912] [2020-10-27 14:12:57,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:12:57,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:12:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:12:57,987 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand 21 states. [2020-10-27 14:12:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:58,440 INFO L93 Difference]: Finished difference Result 233 states and 318 transitions. [2020-10-27 14:12:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:12:58,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-10-27 14:12:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:58,442 INFO L225 Difference]: With dead ends: 233 [2020-10-27 14:12:58,442 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 14:12:58,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:12:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 14:12:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-27 14:12:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 14:12:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2020-10-27 14:12:58,450 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 104 [2020-10-27 14:12:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:58,451 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2020-10-27 14:12:58,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:12:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2020-10-27 14:12:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:12:58,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:58,452 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:58,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:12:58,453 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:58,453 INFO L82 PathProgramCache]: Analyzing trace with hash -251142004, now seen corresponding path program 18 times [2020-10-27 14:12:58,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:58,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174061981] [2020-10-27 14:12:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:58,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:03,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:03,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:13:03,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:13:03,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:13:03,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:13:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:13:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:13:03,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:03,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:03,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:03,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:03,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:03,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:03,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:03,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 14:13:03,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174061981] [2020-10-27 14:13:03,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:03,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:13:03,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156260617] [2020-10-27 14:13:03,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:13:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:13:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:13:03,863 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand 22 states. [2020-10-27 14:13:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:04,241 INFO L93 Difference]: Finished difference Result 243 states and 332 transitions. [2020-10-27 14:13:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:13:04,241 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-10-27 14:13:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:04,243 INFO L225 Difference]: With dead ends: 243 [2020-10-27 14:13:04,243 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 14:13:04,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:13:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 14:13:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-10-27 14:13:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:13:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 188 transitions. [2020-10-27 14:13:04,259 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 188 transitions. Word has length 109 [2020-10-27 14:13:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:04,259 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 188 transitions. [2020-10-27 14:13:04,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:13:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 188 transitions. [2020-10-27 14:13:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 14:13:04,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:04,263 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:04,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:13:04,264 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:04,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1807285067, now seen corresponding path program 19 times [2020-10-27 14:13:04,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:04,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619274690] [2020-10-27 14:13:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:04,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:04,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:09,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:09,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 14:13:09,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:13:09,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:13:09,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:09,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:13:09,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:13:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:13:09,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:09,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:09,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:09,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:09,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:09,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:09,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:09,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:09,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:09,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 14:13:09,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619274690] [2020-10-27 14:13:09,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:09,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:13:09,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898062187] [2020-10-27 14:13:09,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:13:09,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:13:09,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:13:09,702 INFO L87 Difference]: Start difference. First operand 144 states and 188 transitions. Second operand 23 states. [2020-10-27 14:13:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:10,200 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2020-10-27 14:13:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:13:10,201 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-10-27 14:13:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:10,202 INFO L225 Difference]: With dead ends: 253 [2020-10-27 14:13:10,202 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 14:13:10,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:13:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 14:13:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-27 14:13:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 14:13:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 196 transitions. [2020-10-27 14:13:10,215 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 196 transitions. Word has length 114 [2020-10-27 14:13:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:10,215 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 196 transitions. [2020-10-27 14:13:10,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:13:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 196 transitions. [2020-10-27 14:13:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 14:13:10,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:10,217 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:10,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:13:10,217 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:10,218 INFO L82 PathProgramCache]: Analyzing trace with hash -56298200, now seen corresponding path program 20 times [2020-10-27 14:13:10,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:10,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705517152] [2020-10-27 14:13:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:13:15,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:13:15,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:15,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:15,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:15,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:15,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:15,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:15,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:15,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 14:13:15,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705517152] [2020-10-27 14:13:15,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:15,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:13:15,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085953264] [2020-10-27 14:13:15,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:13:15,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:15,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:13:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:13:15,735 INFO L87 Difference]: Start difference. First operand 150 states and 196 transitions. Second operand 24 states. [2020-10-27 14:13:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:16,215 INFO L93 Difference]: Finished difference Result 263 states and 360 transitions. [2020-10-27 14:13:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:13:16,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 119 [2020-10-27 14:13:16,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:16,220 INFO L225 Difference]: With dead ends: 263 [2020-10-27 14:13:16,220 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 14:13:16,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:13:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 14:13:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-27 14:13:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 14:13:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2020-10-27 14:13:16,230 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 119 [2020-10-27 14:13:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:16,231 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2020-10-27 14:13:16,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:13:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2020-10-27 14:13:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 14:13:16,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:16,235 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:16,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:13:16,236 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1892708689, now seen corresponding path program 21 times [2020-10-27 14:13:16,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751972068] [2020-10-27 14:13:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:21,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:21,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 14:13:21,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:13:21,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:13:21,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:13:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:13:21,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:13:21,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:21,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:21,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:21,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:21,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:21,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:21,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:21,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:21,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:21,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 14:13:21,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751972068] [2020-10-27 14:13:21,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:21,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:13:21,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659390387] [2020-10-27 14:13:21,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:13:21,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:13:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:13:21,748 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand 25 states. [2020-10-27 14:13:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:22,297 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2020-10-27 14:13:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:13:22,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-10-27 14:13:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:22,303 INFO L225 Difference]: With dead ends: 273 [2020-10-27 14:13:22,303 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:13:22,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:13:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:13:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-10-27 14:13:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 14:13:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 212 transitions. [2020-10-27 14:13:22,312 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 212 transitions. Word has length 124 [2020-10-27 14:13:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:22,313 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 212 transitions. [2020-10-27 14:13:22,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:13:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 212 transitions. [2020-10-27 14:13:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 14:13:22,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:22,314 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:22,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:13:22,315 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:22,315 INFO L82 PathProgramCache]: Analyzing trace with hash 683944388, now seen corresponding path program 22 times [2020-10-27 14:13:22,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:22,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113602735] [2020-10-27 14:13:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:22,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:23,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:27,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:27,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 14:13:27,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:13:27,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:13:27,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:13:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:13:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:13:27,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:27,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:27,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:27,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:27,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:27,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:27,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:27,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 14:13:27,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113602735] [2020-10-27 14:13:27,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:27,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:13:27,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818093014] [2020-10-27 14:13:27,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:13:27,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:13:27,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:13:27,898 INFO L87 Difference]: Start difference. First operand 162 states and 212 transitions. Second operand 26 states. [2020-10-27 14:13:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:28,482 INFO L93 Difference]: Finished difference Result 283 states and 388 transitions. [2020-10-27 14:13:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:13:28,483 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 129 [2020-10-27 14:13:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:28,485 INFO L225 Difference]: With dead ends: 283 [2020-10-27 14:13:28,485 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 14:13:28,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:13:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 14:13:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-27 14:13:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 14:13:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 220 transitions. [2020-10-27 14:13:28,495 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 220 transitions. Word has length 129 [2020-10-27 14:13:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:28,495 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 220 transitions. [2020-10-27 14:13:28,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:13:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 220 transitions. [2020-10-27 14:13:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 14:13:28,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:28,497 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:28,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:13:28,497 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash -467590637, now seen corresponding path program 23 times [2020-10-27 14:13:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:28,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303133803] [2020-10-27 14:13:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:28,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:13:33,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:34,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:34,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:34,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:34,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:34,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:34,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:34,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:34,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-27 14:13:34,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303133803] [2020-10-27 14:13:34,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:34,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:13:34,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917908413] [2020-10-27 14:13:34,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:13:34,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:13:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:13:34,082 INFO L87 Difference]: Start difference. First operand 168 states and 220 transitions. Second operand 27 states. [2020-10-27 14:13:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:34,664 INFO L93 Difference]: Finished difference Result 293 states and 402 transitions. [2020-10-27 14:13:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:13:34,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2020-10-27 14:13:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:34,667 INFO L225 Difference]: With dead ends: 293 [2020-10-27 14:13:34,667 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 14:13:34,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:13:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 14:13:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-10-27 14:13:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 14:13:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 228 transitions. [2020-10-27 14:13:34,677 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 228 transitions. Word has length 134 [2020-10-27 14:13:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:34,677 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 228 transitions. [2020-10-27 14:13:34,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:13:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 228 transitions. [2020-10-27 14:13:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:13:34,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:34,679 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:34,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:13:34,679 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:34,680 INFO L82 PathProgramCache]: Analyzing trace with hash -460636576, now seen corresponding path program 24 times [2020-10-27 14:13:34,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:34,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328024052] [2020-10-27 14:13:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:34,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:39,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:39,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:13:39,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:13:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:13:39,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:13:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:13:39,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:13:39,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:40,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:40,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:40,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:40,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:40,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 14:13:40,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328024052] [2020-10-27 14:13:40,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:40,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:13:40,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144887197] [2020-10-27 14:13:40,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:13:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:13:40,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:13:40,346 INFO L87 Difference]: Start difference. First operand 174 states and 228 transitions. Second operand 28 states. [2020-10-27 14:13:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:40,987 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2020-10-27 14:13:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:13:40,988 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 139 [2020-10-27 14:13:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:40,990 INFO L225 Difference]: With dead ends: 303 [2020-10-27 14:13:40,990 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 14:13:40,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:13:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 14:13:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-10-27 14:13:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 14:13:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 236 transitions. [2020-10-27 14:13:40,999 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 236 transitions. Word has length 139 [2020-10-27 14:13:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:41,000 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 236 transitions. [2020-10-27 14:13:41,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:13:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 236 transitions. [2020-10-27 14:13:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 14:13:41,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:41,002 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:41,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:13:41,003 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1906832759, now seen corresponding path program 25 times [2020-10-27 14:13:41,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:41,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321185764] [2020-10-27 14:13:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:41,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:42,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:46,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:46,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 14:13:46,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:13:46,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 14:13:46,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:46,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:13:46,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:13:46,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:13:46,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:46,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:46,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:46,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:46,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:46,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:46,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:46,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 14:13:46,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321185764] [2020-10-27 14:13:46,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:46,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:13:46,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651472320] [2020-10-27 14:13:46,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:13:46,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:13:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:13:46,724 INFO L87 Difference]: Start difference. First operand 180 states and 236 transitions. Second operand 29 states. [2020-10-27 14:13:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:47,412 INFO L93 Difference]: Finished difference Result 313 states and 430 transitions. [2020-10-27 14:13:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:13:47,412 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 144 [2020-10-27 14:13:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:47,414 INFO L225 Difference]: With dead ends: 313 [2020-10-27 14:13:47,414 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 14:13:47,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:13:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 14:13:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-27 14:13:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 14:13:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 244 transitions. [2020-10-27 14:13:47,425 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 244 transitions. Word has length 144 [2020-10-27 14:13:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:47,425 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 244 transitions. [2020-10-27 14:13:47,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:13:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 244 transitions. [2020-10-27 14:13:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 14:13:47,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:47,426 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:47,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:13:47,427 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2040525564, now seen corresponding path program 26 times [2020-10-27 14:13:47,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:47,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220001343] [2020-10-27 14:13:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:47,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:49,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:51,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:52,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:52,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 14:13:52,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:13:52,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-27 14:13:52,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:13:52,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:13:52,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:13:52,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:53,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:53,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:53,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:53,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:53,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:53,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:53,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:53,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:53,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:53,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 14:13:53,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220001343] [2020-10-27 14:13:53,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:53,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:13:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966710219] [2020-10-27 14:13:53,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:13:53,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:13:53,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:13:53,328 INFO L87 Difference]: Start difference. First operand 186 states and 244 transitions. Second operand 30 states. [2020-10-27 14:13:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:54,024 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2020-10-27 14:13:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:13:54,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2020-10-27 14:13:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:54,026 INFO L225 Difference]: With dead ends: 323 [2020-10-27 14:13:54,026 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:13:54,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:13:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:13:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-10-27 14:13:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 14:13:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 252 transitions. [2020-10-27 14:13:54,036 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 252 transitions. Word has length 149 [2020-10-27 14:13:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:54,036 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 252 transitions. [2020-10-27 14:13:54,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:13:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 252 transitions. [2020-10-27 14:13:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 14:13:54,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:54,038 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:54,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:13:54,038 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash -698464037, now seen corresponding path program 27 times [2020-10-27 14:13:54,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:54,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687467137] [2020-10-27 14:13:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:54,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:56,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:59,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 14:13:59,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:13:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 14:13:59,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 14:13:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:13:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 14:13:59,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:59,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:59,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:59,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:59,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:59,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:13:59,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:59,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:59,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:59,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:59,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2020-10-27 14:13:59,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687467137] [2020-10-27 14:13:59,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:13:59,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 14:13:59,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852793363] [2020-10-27 14:13:59,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:13:59,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:59,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:13:59,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:13:59,657 INFO L87 Difference]: Start difference. First operand 192 states and 252 transitions. Second operand 10 states. [2020-10-27 14:14:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:00,089 INFO L93 Difference]: Finished difference Result 457 states and 638 transitions. [2020-10-27 14:14:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:14:00,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 154 [2020-10-27 14:14:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:00,096 INFO L225 Difference]: With dead ends: 457 [2020-10-27 14:14:00,096 INFO L226 Difference]: Without dead ends: 443 [2020-10-27 14:14:00,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:14:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-27 14:14:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 309. [2020-10-27 14:14:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-27 14:14:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 424 transitions. [2020-10-27 14:14:00,125 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 424 transitions. Word has length 154 [2020-10-27 14:14:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:00,128 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 424 transitions. [2020-10-27 14:14:00,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:14:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 424 transitions. [2020-10-27 14:14:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 14:14:00,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:00,130 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:00,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:14:00,131 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash -726964327, now seen corresponding path program 1 times [2020-10-27 14:14:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:00,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877554908] [2020-10-27 14:14:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:00,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:14:05,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 14:14:05,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:05,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:05,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:05,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:05,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:05,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:05,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:14:05,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:05,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:05,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:05,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:05,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2020-10-27 14:14:05,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877554908] [2020-10-27 14:14:05,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:05,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:14:05,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700427730] [2020-10-27 14:14:05,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:14:05,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:14:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:14:05,518 INFO L87 Difference]: Start difference. First operand 309 states and 424 transitions. Second operand 11 states. [2020-10-27 14:14:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:06,129 INFO L93 Difference]: Finished difference Result 462 states and 643 transitions. [2020-10-27 14:14:06,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:14:06,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2020-10-27 14:14:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:06,137 INFO L225 Difference]: With dead ends: 462 [2020-10-27 14:14:06,138 INFO L226 Difference]: Without dead ends: 448 [2020-10-27 14:14:06,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:14:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-27 14:14:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 198. [2020-10-27 14:14:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 14:14:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 258 transitions. [2020-10-27 14:14:06,171 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 258 transitions. Word has length 154 [2020-10-27 14:14:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:06,172 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 258 transitions. [2020-10-27 14:14:06,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:14:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 258 transitions. [2020-10-27 14:14:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 14:14:06,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:06,180 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:06,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:14:06,180 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash 942619871, now seen corresponding path program 1 times [2020-10-27 14:14:06,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:06,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12790246] [2020-10-27 14:14:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:06,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:06,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:11,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 14:14:11,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:12,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:12,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:12,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:12,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:12,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:12,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:14:12,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:12,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:12,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:12,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:14:12,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-10-27 14:14:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:12,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:12,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:12,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:12,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:14:12,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:12,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:12,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:12,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:12,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:14:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 2 proven. 1080 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-27 14:14:12,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12790246] [2020-10-27 14:14:12,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:12,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:14:12,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227610720] [2020-10-27 14:14:12,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:14:12,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:14:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:14:12,091 INFO L87 Difference]: Start difference. First operand 198 states and 258 transitions. Second operand 31 states. [2020-10-27 14:14:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:12,937 INFO L93 Difference]: Finished difference Result 345 states and 470 transitions. [2020-10-27 14:14:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:14:12,937 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2020-10-27 14:14:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:12,939 INFO L225 Difference]: With dead ends: 345 [2020-10-27 14:14:12,939 INFO L226 Difference]: Without dead ends: 208 [2020-10-27 14:14:12,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:14:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-27 14:14:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-10-27 14:14:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 14:14:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 266 transitions. [2020-10-27 14:14:12,953 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 266 transitions. Word has length 162 [2020-10-27 14:14:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:12,953 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 266 transitions. [2020-10-27 14:14:12,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:14:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 266 transitions. [2020-10-27 14:14:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 14:14:12,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:12,956 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:12,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:14:12,957 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -236917092, now seen corresponding path program 2 times [2020-10-27 14:14:12,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:12,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712489224] [2020-10-27 14:14:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:13,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:13,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:18,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:18,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 14:14:18,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:18,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 14:14:18,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:18,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:14:18,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:14:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 14:14:18,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:18,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:18,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:18,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:18,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:18,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:14:18,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:18,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:18,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:18,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-27 14:14:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:18,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:18,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:18,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:18,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:14:18,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 2 proven. 1162 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-10-27 14:14:18,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712489224] [2020-10-27 14:14:18,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:18,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:14:18,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457824168] [2020-10-27 14:14:18,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:14:18,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:14:18,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:14:18,862 INFO L87 Difference]: Start difference. First operand 204 states and 266 transitions. Second operand 32 states. [2020-10-27 14:14:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:19,702 INFO L93 Difference]: Finished difference Result 355 states and 484 transitions. [2020-10-27 14:14:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:14:19,703 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 167 [2020-10-27 14:14:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:19,708 INFO L225 Difference]: With dead ends: 355 [2020-10-27 14:14:19,708 INFO L226 Difference]: Without dead ends: 214 [2020-10-27 14:14:19,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:14:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-27 14:14:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-10-27 14:14:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-27 14:14:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 274 transitions. [2020-10-27 14:14:19,732 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 274 transitions. Word has length 167 [2020-10-27 14:14:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:19,732 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 274 transitions. [2020-10-27 14:14:19,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:14:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 274 transitions. [2020-10-27 14:14:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 14:14:19,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:19,735 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:19,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:14:19,735 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:19,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1926779837, now seen corresponding path program 3 times [2020-10-27 14:14:19,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:19,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720272371] [2020-10-27 14:14:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:24,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 14:14:24,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:24,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 14:14:24,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:14:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:14:24,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:14:24,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:25,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:25,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:25,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:25,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:25,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:25,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:14:25,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:25,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:25,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:14:25,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-10-27 14:14:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:25,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:25,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:25,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:25,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:25,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:14:25,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:25,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 2 proven. 1247 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-10-27 14:14:25,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720272371] [2020-10-27 14:14:25,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:25,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:14:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064782032] [2020-10-27 14:14:25,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:14:25,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:14:25,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:14:25,721 INFO L87 Difference]: Start difference. First operand 210 states and 274 transitions. Second operand 33 states. [2020-10-27 14:14:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:26,421 INFO L93 Difference]: Finished difference Result 365 states and 498 transitions. [2020-10-27 14:14:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:14:26,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 172 [2020-10-27 14:14:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:26,424 INFO L225 Difference]: With dead ends: 365 [2020-10-27 14:14:26,424 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 14:14:26,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:14:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 14:14:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-10-27 14:14:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 14:14:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 282 transitions. [2020-10-27 14:14:26,438 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 282 transitions. Word has length 172 [2020-10-27 14:14:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:26,438 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 282 transitions. [2020-10-27 14:14:26,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:14:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 282 transitions. [2020-10-27 14:14:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 14:14:26,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:26,441 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:26,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:14:26,442 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:26,442 INFO L82 PathProgramCache]: Analyzing trace with hash 465684280, now seen corresponding path program 4 times [2020-10-27 14:14:26,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:26,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992515031] [2020-10-27 14:14:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:26,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:26,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:31,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 14:14:31,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:32,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:32,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:32,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:32,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:32,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:32,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:14:32,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:32,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:32,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:32,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:32,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:32,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-27 14:14:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:32,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:32,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:32,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:32,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:32,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:14:32,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:32,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2239 backedges. 2 proven. 1335 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2020-10-27 14:14:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992515031] [2020-10-27 14:14:32,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:32,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:14:32,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515750138] [2020-10-27 14:14:32,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:14:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:14:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:14:32,445 INFO L87 Difference]: Start difference. First operand 216 states and 282 transitions. Second operand 34 states. [2020-10-27 14:14:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:33,218 INFO L93 Difference]: Finished difference Result 375 states and 512 transitions. [2020-10-27 14:14:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:14:33,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 177 [2020-10-27 14:14:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:33,222 INFO L225 Difference]: With dead ends: 375 [2020-10-27 14:14:33,222 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 14:14:33,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:14:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 14:14:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-27 14:14:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 14:14:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 290 transitions. [2020-10-27 14:14:33,238 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 290 transitions. Word has length 177 [2020-10-27 14:14:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:33,239 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 290 transitions. [2020-10-27 14:14:33,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:14:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 290 transitions. [2020-10-27 14:14:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 14:14:33,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:33,243 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:33,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:14:33,244 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash 688135079, now seen corresponding path program 5 times [2020-10-27 14:14:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:33,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341291749] [2020-10-27 14:14:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:33,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:38,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:38,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 14:14:38,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:38,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-27 14:14:38,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:14:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:14:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:14:38,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:39,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:39,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:39,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:39,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:39,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:14:39,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:39,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-10-27 14:14:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:39,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:39,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:39,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:39,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:14:39,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:39,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:39,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:39,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:39,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2391 backedges. 2 proven. 1426 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2020-10-27 14:14:39,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341291749] [2020-10-27 14:14:39,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:39,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:14:39,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65727038] [2020-10-27 14:14:39,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:14:39,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:39,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:14:39,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:14:39,292 INFO L87 Difference]: Start difference. First operand 222 states and 290 transitions. Second operand 35 states. [2020-10-27 14:14:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:40,040 INFO L93 Difference]: Finished difference Result 385 states and 526 transitions. [2020-10-27 14:14:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:14:40,041 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 182 [2020-10-27 14:14:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:40,043 INFO L225 Difference]: With dead ends: 385 [2020-10-27 14:14:40,043 INFO L226 Difference]: Without dead ends: 232 [2020-10-27 14:14:40,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:14:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-27 14:14:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-10-27 14:14:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 14:14:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2020-10-27 14:14:40,065 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 182 [2020-10-27 14:14:40,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:40,065 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2020-10-27 14:14:40,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:14:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2020-10-27 14:14:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 14:14:40,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:40,069 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:40,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:14:40,069 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -167673900, now seen corresponding path program 6 times [2020-10-27 14:14:40,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:40,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617717174] [2020-10-27 14:14:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:40,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:40,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:45,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:45,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-27 14:14:45,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:45,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5207 [2020-10-27 14:14:45,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:45,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:14:45,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:14:45,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 14:14:45,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:46,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:46,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:46,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:46,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:14:46,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:46,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:46,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-27 14:14:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:46,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:46,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:46,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:46,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:14:46,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:46,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:46,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2548 backedges. 2 proven. 1520 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-27 14:14:46,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617717174] [2020-10-27 14:14:46,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:14:46,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651776906] [2020-10-27 14:14:46,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:14:46,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:14:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:14:46,310 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand 36 states. [2020-10-27 14:14:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:47,162 INFO L93 Difference]: Finished difference Result 395 states and 540 transitions. [2020-10-27 14:14:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:14:47,163 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 187 [2020-10-27 14:14:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:47,164 INFO L225 Difference]: With dead ends: 395 [2020-10-27 14:14:47,165 INFO L226 Difference]: Without dead ends: 238 [2020-10-27 14:14:47,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:14:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-27 14:14:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-10-27 14:14:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 14:14:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 306 transitions. [2020-10-27 14:14:47,182 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 306 transitions. Word has length 187 [2020-10-27 14:14:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:47,182 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 306 transitions. [2020-10-27 14:14:47,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:14:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 306 transitions. [2020-10-27 14:14:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-27 14:14:47,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:47,185 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:47,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:14:47,186 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 715049739, now seen corresponding path program 7 times [2020-10-27 14:14:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:47,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209686840] [2020-10-27 14:14:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:47,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:47,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:52,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:52,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 14:14:52,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 14:14:52,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:14:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:14:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:14:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:53,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:53,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:53,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:53,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-10-27 14:14:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:53,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:53,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:53,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:53,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:53,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:14:53,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:53,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:53,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:53,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:53,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 2 proven. 1617 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2020-10-27 14:14:53,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209686840] [2020-10-27 14:14:53,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:53,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:14:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144191797] [2020-10-27 14:14:53,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:14:53,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:14:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:14:53,327 INFO L87 Difference]: Start difference. First operand 234 states and 306 transitions. Second operand 37 states. [2020-10-27 14:14:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:54,121 INFO L93 Difference]: Finished difference Result 405 states and 554 transitions. [2020-10-27 14:14:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:14:54,121 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 192 [2020-10-27 14:14:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:54,123 INFO L225 Difference]: With dead ends: 405 [2020-10-27 14:14:54,124 INFO L226 Difference]: Without dead ends: 244 [2020-10-27 14:14:54,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:14:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-27 14:14:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-10-27 14:14:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 14:14:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 314 transitions. [2020-10-27 14:14:54,138 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 314 transitions. Word has length 192 [2020-10-27 14:14:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:54,139 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 314 transitions. [2020-10-27 14:14:54,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:14:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 314 transitions. [2020-10-27 14:14:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 14:14:54,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:54,142 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:54,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:14:54,142 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:54,142 INFO L82 PathProgramCache]: Analyzing trace with hash 713414768, now seen corresponding path program 8 times [2020-10-27 14:14:54,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:54,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402013167] [2020-10-27 14:14:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:54,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:59,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-27 14:14:59,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:59,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-27 14:14:59,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:14:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:14:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 14:14:59,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:00,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:00,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:00,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-10-27 14:15:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:00,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:00,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2877 backedges. 2 proven. 1717 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2020-10-27 14:15:00,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402013167] [2020-10-27 14:15:00,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:00,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:15:00,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127709834] [2020-10-27 14:15:00,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:15:00,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:15:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:15:00,345 INFO L87 Difference]: Start difference. First operand 240 states and 314 transitions. Second operand 38 states. [2020-10-27 14:15:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:01,275 INFO L93 Difference]: Finished difference Result 415 states and 568 transitions. [2020-10-27 14:15:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:15:01,276 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2020-10-27 14:15:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:01,278 INFO L225 Difference]: With dead ends: 415 [2020-10-27 14:15:01,278 INFO L226 Difference]: Without dead ends: 250 [2020-10-27 14:15:01,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:15:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-27 14:15:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-10-27 14:15:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-27 14:15:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 322 transitions. [2020-10-27 14:15:01,296 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 322 transitions. Word has length 197 [2020-10-27 14:15:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:01,296 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 322 transitions. [2020-10-27 14:15:01,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:15:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 322 transitions. [2020-10-27 14:15:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-27 14:15:01,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:01,303 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:01,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:15:01,303 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:01,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:01,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1481767535, now seen corresponding path program 9 times [2020-10-27 14:15:01,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:01,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376361236] [2020-10-27 14:15:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5218 [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 14:15:06,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:07,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:07,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:07,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-10-27 14:15:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:07,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:07,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:07,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:07,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:07,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:07,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:07,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3049 backedges. 2 proven. 1820 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2020-10-27 14:15:07,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376361236] [2020-10-27 14:15:07,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:07,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:15:07,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764995132] [2020-10-27 14:15:07,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:15:07,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:07,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:15:07,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:15:07,730 INFO L87 Difference]: Start difference. First operand 246 states and 322 transitions. Second operand 39 states. [2020-10-27 14:15:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:08,673 INFO L93 Difference]: Finished difference Result 425 states and 582 transitions. [2020-10-27 14:15:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:15:08,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 202 [2020-10-27 14:15:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:08,676 INFO L225 Difference]: With dead ends: 425 [2020-10-27 14:15:08,677 INFO L226 Difference]: Without dead ends: 256 [2020-10-27 14:15:08,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:15:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-27 14:15:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-10-27 14:15:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 14:15:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 330 transitions. [2020-10-27 14:15:08,691 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 330 transitions. Word has length 202 [2020-10-27 14:15:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:08,691 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 330 transitions. [2020-10-27 14:15:08,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:15:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 330 transitions. [2020-10-27 14:15:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 14:15:08,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:08,693 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:08,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:15:08,694 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:08,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1236570380, now seen corresponding path program 10 times [2020-10-27 14:15:08,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:08,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996983318] [2020-10-27 14:15:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:08,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:08,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking...