/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:51:11,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:51:11,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:51:11,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:51:11,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:51:11,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:51:11,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:51:11,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:51:11,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:51:11,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:51:11,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:51:11,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:51:11,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:51:11,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:51:11,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:51:11,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:51:11,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:51:11,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:51:11,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:51:11,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:51:11,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:51:11,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:51:11,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:51:11,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:51:11,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:51:11,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:51:11,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:51:11,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:51:11,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:51:11,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:51:11,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:51:11,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:51:11,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:51:11,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:51:11,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:51:11,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:51:11,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:51:11,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:51:11,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:51:11,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:51:11,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:51:11,836 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 [2020-10-26 19:51:11,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:51:11,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:51:11,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:51:11,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:51:11,864 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:51:11,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:51:11,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:51:11,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:51:11,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:51:11,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:51:11,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:51:11,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:51:11,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:51:11,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:51:11,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:51:11,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:51:11,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:51:11,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:51:11,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:51:11,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:51:11,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:51:11,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:51:11,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:51:11,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:51:11,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:51:11,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:51:11,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:51:11,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:51:11,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:51:11,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:51:12,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:51:12,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:51:12,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:51:12,313 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:51:12,314 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:51:12,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2020-10-26 19:51:12,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2b735c9/0c123b26721e4f65aada9fe8ea459c10/FLAG76ab797fb [2020-10-26 19:51:13,092 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:51:13,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome1-1.i [2020-10-26 19:51:13,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2b735c9/0c123b26721e4f65aada9fe8ea459c10/FLAG76ab797fb [2020-10-26 19:51:13,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2b735c9/0c123b26721e4f65aada9fe8ea459c10 [2020-10-26 19:51:13,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:51:13,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:51:13,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:51:13,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:51:13,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:51:13,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4991ead9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13, skipping insertion in model container [2020-10-26 19:51:13,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:51:13,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:51:13,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:51:13,692 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:51:13,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:51:13,730 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:51:13,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13 WrapperNode [2020-10-26 19:51:13,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:51:13,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:51:13,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:51:13,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:51:13,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (1/1) ... [2020-10-26 19:51:13,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:51:13,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:51:13,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:51:13,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:51:13,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (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 [2020-10-26 19:51:13,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:51:13,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:51:13,872 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:51:13,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:51:13,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:51:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:51:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:51:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:51:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:51:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:51:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:51:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:51:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:51:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:51:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:51:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:51:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:51:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:51:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:51:13,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:51:14,153 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:51:14,153 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:51:14,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:51:14 BoogieIcfgContainer [2020-10-26 19:51:14,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:51:14,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:51:14,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:51:14,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:51:14,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:51:13" (1/3) ... [2020-10-26 19:51:14,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eded4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:51:14, skipping insertion in model container [2020-10-26 19:51:14,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:51:13" (2/3) ... [2020-10-26 19:51:14,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eded4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:51:14, skipping insertion in model container [2020-10-26 19:51:14,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:51:14" (3/3) ... [2020-10-26 19:51:14,166 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2020-10-26 19:51:14,188 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:51:14,198 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:51:14,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:51:14,333 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:51:14,336 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:51:14,337 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:51:14,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:51:14,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:51:14,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:51:14,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:51:14,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:51:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-26 19:51:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:51:14,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:14,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:14,405 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1436436000, now seen corresponding path program 1 times [2020-10-26 19:51:14,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:14,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276845458] [2020-10-26 19:51:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:14,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:14,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:14,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:14,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:51:14,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:14,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-26 19:51:14,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:14,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:51:14,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:14,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:51:14,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:14,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:14,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:14,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:14,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:14,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:51:14,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:14,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276845458] [2020-10-26 19:51:14,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:14,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:51:14,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918091337] [2020-10-26 19:51:14,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:51:14,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:14,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:51:14,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:51:14,940 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-26 19:51:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:15,038 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-10-26 19:51:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:51:15,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-26 19:51:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:15,048 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:51:15,048 INFO L226 Difference]: Without dead ends: 26 [2020-10-26 19:51:15,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:51:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-26 19:51:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-26 19:51:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:51:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-26 19:51:15,097 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2020-10-26 19:51:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:15,097 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-26 19:51:15,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:51:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-26 19:51:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:51:15,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:15,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:15,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:51:15,099 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1471379055, now seen corresponding path program 1 times [2020-10-26 19:51:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:15,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511138737] [2020-10-26 19:51:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:15,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:15,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:15,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:51:15,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:15,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-26 19:51:15,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:51:15,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:51:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:51:15,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:15,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:15,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:15,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:15,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:51:15,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:15,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:15,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:51:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:15,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511138737] [2020-10-26 19:51:15,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:15,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:51:15,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895644537] [2020-10-26 19:51:15,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:51:15,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:51:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:51:15,467 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-26 19:51:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:15,564 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-26 19:51:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:51:15,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-26 19:51:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:15,566 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:51:15,566 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:51:15,568 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 [2020-10-26 19:51:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:51:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-26 19:51:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:51:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 19:51:15,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2020-10-26 19:51:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:15,578 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 19:51:15,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:51:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 19:51:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:51:15,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:15,579 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] [2020-10-26 19:51:15,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:51:15,580 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 435813880, now seen corresponding path program 1 times [2020-10-26 19:51:15,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:15,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023204421] [2020-10-26 19:51:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:15,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:15,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:15,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:16,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:16,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:51:16,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-26 19:51:16,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:51:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:51:16,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:51:16,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:16,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:16,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:16,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:16,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:16,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:51:16,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:16,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:51:16,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023204421] [2020-10-26 19:51:16,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:16,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:51:16,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518195069] [2020-10-26 19:51:16,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:51:16,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:51:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:51:16,971 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 19:51:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:17,100 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-26 19:51:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:51:17,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:51:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:17,102 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:51:17,102 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:51:17,103 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 [2020-10-26 19:51:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:51:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-26 19:51:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:51:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-26 19:51:17,111 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-26 19:51:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:17,112 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-26 19:51:17,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:51:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-26 19:51:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:51:17,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:17,113 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] [2020-10-26 19:51:17,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:51:17,114 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash -943322827, now seen corresponding path program 2 times [2020-10-26 19:51:17,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:17,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128941285] [2020-10-26 19:51:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:17,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:17,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:19,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:51:19,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2005 [2020-10-26 19:51:19,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:19,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:51:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:51:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:19,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:19,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:19,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:19,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:19,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:19,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:19,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:19,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:19,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:51:19,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128941285] [2020-10-26 19:51:19,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:19,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:51:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468223655] [2020-10-26 19:51:19,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:51:19,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:19,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:51:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:51:19,205 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-10-26 19:51:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:19,326 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-26 19:51:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:51:19,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-26 19:51:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:19,328 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:51:19,328 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:51:19,329 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 [2020-10-26 19:51:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:51:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-26 19:51:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:51:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-26 19:51:19,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2020-10-26 19:51:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:19,338 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-26 19:51:19,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:51:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-26 19:51:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:51:19,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:19,339 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] [2020-10-26 19:51:19,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:51:19,340 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:19,340 INFO L82 PathProgramCache]: Analyzing trace with hash -600953260, now seen corresponding path program 3 times [2020-10-26 19:51:19,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:19,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812352376] [2020-10-26 19:51:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:19,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:19,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:24,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:51:24,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:24,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:51:24,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:51:24,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:24,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:51:24,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:24,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:24,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:24,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:24,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:24,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:51:24,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:24,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:24,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:51:24,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812352376] [2020-10-26 19:51:24,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:24,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:51:24,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586508516] [2020-10-26 19:51:24,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:51:24,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:24,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:51:24,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:51:24,477 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-10-26 19:51:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:24,656 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-26 19:51:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:51:24,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-26 19:51:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:24,658 INFO L225 Difference]: With dead ends: 71 [2020-10-26 19:51:24,658 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:51:24,660 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 [2020-10-26 19:51:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:51:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-26 19:51:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:51:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-26 19:51:24,676 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2020-10-26 19:51:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:24,676 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-26 19:51:24,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:51:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-26 19:51:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:51:24,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:24,681 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] [2020-10-26 19:51:24,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:51:24,681 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash -40650535, now seen corresponding path program 4 times [2020-10-26 19:51:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:24,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008542181] [2020-10-26 19:51:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:24,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:25,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:29,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:29,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:51:29,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:51:29,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:51:29,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:29,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:51:29,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:29,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:51:29,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:30,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:30,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:30,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:30,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:51:30,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:30,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:30,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-26 19:51:30,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008542181] [2020-10-26 19:51:30,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:30,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:51:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045189664] [2020-10-26 19:51:30,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:51:30,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:51:30,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:51:30,333 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 10 states. [2020-10-26 19:51:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:30,684 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-10-26 19:51:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:51:30,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-26 19:51:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:30,687 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:51:30,687 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:51:30,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:51:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:51:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-26 19:51:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:51:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-26 19:51:30,702 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 38 [2020-10-26 19:51:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:30,703 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-26 19:51:30,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:51:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-26 19:51:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:51:30,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:30,704 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:30,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:51:30,705 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash 382051291, now seen corresponding path program 1 times [2020-10-26 19:51:30,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:30,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147245909] [2020-10-26 19:51:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:30,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:31,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:33,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:33,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:51:33,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:51:33,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2815 [2020-10-26 19:51:33,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:33,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:51:33,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:33,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:51:33,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:33,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:33,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:33,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:33,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:33,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:33,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:51:33,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:33,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:33,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:33,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:51:33,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147245909] [2020-10-26 19:51:33,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:33,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:51:33,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241229556] [2020-10-26 19:51:33,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:51:33,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:51:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:51:33,644 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 9 states. [2020-10-26 19:51:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:33,836 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2020-10-26 19:51:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:51:33,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-26 19:51:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:33,840 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:51:33,841 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:51:33,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:51:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:51:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 70. [2020-10-26 19:51:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:51:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-10-26 19:51:33,854 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2020-10-26 19:51:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:33,854 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-10-26 19:51:33,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:51:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-10-26 19:51:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:51:33,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:33,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:33,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:51:33,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:33,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1379783570, now seen corresponding path program 2 times [2020-10-26 19:51:33,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:33,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765894544] [2020-10-26 19:51:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:33,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:34,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:38,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:38,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:51:38,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:51:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4520 [2020-10-26 19:51:38,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:51:38,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:38,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:51:38,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:38,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:38,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:38,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:38,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:38,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:38,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:51:38,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765894544] [2020-10-26 19:51:38,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:38,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:51:38,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997036730] [2020-10-26 19:51:38,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:51:38,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:51:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:51:38,515 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 10 states. [2020-10-26 19:51:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:38,732 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-10-26 19:51:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:51:38,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-26 19:51:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:38,734 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:51:38,735 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:51:38,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:51:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:51:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-10-26 19:51:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:51:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-10-26 19:51:38,748 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 43 [2020-10-26 19:51:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:38,748 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-10-26 19:51:38,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:51:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-10-26 19:51:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:51:38,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:38,750 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:38,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:51:38,750 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:38,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:38,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1897265663, now seen corresponding path program 3 times [2020-10-26 19:51:38,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:38,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909661345] [2020-10-26 19:51:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:38,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:38,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:38,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:40,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:43,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:43,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:51:43,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:51:43,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:51:43,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:43,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:51:43,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:43,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:51:43,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:43,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:43,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:43,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:43,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:43,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:43,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:43,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:51:43,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909661345] [2020-10-26 19:51:43,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:43,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:51:43,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666181765] [2020-10-26 19:51:43,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:51:43,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:43,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:51:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:51:43,921 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 10 states. [2020-10-26 19:51:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:44,114 INFO L93 Difference]: Finished difference Result 276 states and 350 transitions. [2020-10-26 19:51:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:51:44,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-26 19:51:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:44,118 INFO L225 Difference]: With dead ends: 276 [2020-10-26 19:51:44,118 INFO L226 Difference]: Without dead ends: 217 [2020-10-26 19:51:44,120 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 [2020-10-26 19:51:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-26 19:51:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 86. [2020-10-26 19:51:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:51:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-10-26 19:51:44,133 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 48 [2020-10-26 19:51:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:44,134 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-10-26 19:51:44,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:51:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-10-26 19:51:44,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:51:44,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:44,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:44,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:51:44,140 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:44,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1366837686, now seen corresponding path program 4 times [2020-10-26 19:51:44,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:44,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357002870] [2020-10-26 19:51:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:44,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:44,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:45,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:45,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:49,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:49,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:51:49,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:51:49,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:51:49,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:49,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:51:49,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:49,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:51:49,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:49,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:49,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:49,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 19:51:49,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357002870] [2020-10-26 19:51:49,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:49,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:51:49,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381853909] [2020-10-26 19:51:49,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:51:49,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:51:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:51:49,316 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 12 states. [2020-10-26 19:51:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:49,678 INFO L93 Difference]: Finished difference Result 153 states and 191 transitions. [2020-10-26 19:51:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:51:49,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-26 19:51:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:49,680 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:51:49,680 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:51:49,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:51:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:51:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-26 19:51:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:51:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2020-10-26 19:51:49,713 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 53 [2020-10-26 19:51:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:49,714 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2020-10-26 19:51:49,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:51:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2020-10-26 19:51:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:51:49,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:49,717 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:49,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:51:49,718 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash 343669046, now seen corresponding path program 1 times [2020-10-26 19:51:49,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:49,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139546057] [2020-10-26 19:51:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:49,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:49,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:54,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:51:54,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:51:54,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:51:54,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:54,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:51:54,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:54,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:51:54,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:54,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:54,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:54,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:54,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:54,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:51:54,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-26 19:51:54,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139546057] [2020-10-26 19:51:54,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:51:54,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:51:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641083029] [2020-10-26 19:51:54,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:51:54,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:54,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:51:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:51:54,829 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand 5 states. [2020-10-26 19:51:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:54,939 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-26 19:51:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:51:54,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-26 19:51:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:54,944 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:51:54,944 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:51:54,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:51:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:51:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-26 19:51:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:51:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-10-26 19:51:54,957 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 56 [2020-10-26 19:51:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:54,957 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-10-26 19:51:54,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:51:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-10-26 19:51:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:51:54,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:54,959 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:54,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:51:54,959 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:54,960 INFO L82 PathProgramCache]: Analyzing trace with hash 609760193, now seen corresponding path program 5 times [2020-10-26 19:51:54,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:54,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458489030] [2020-10-26 19:51:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:54,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:54,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:55,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:56,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:59,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:59,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:51:59,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:51:59,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:51:59,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:51:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:51:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:51:59,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:00,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:00,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:00,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:00,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:00,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:00,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:00,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:00,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 19:52:00,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458489030] [2020-10-26 19:52:00,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:00,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:52:00,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722736187] [2020-10-26 19:52:00,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:52:00,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:00,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:52:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:52:00,044 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 5 states. [2020-10-26 19:52:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:00,171 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-26 19:52:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:52:00,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-26 19:52:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:00,173 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:52:00,173 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:52:00,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:52:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:52:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:52:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:52:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-26 19:52:00,184 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 56 [2020-10-26 19:52:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:00,185 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-26 19:52:00,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:52:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-26 19:52:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:52:00,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:00,186 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:00,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:52:00,187 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:00,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2035811134, now seen corresponding path program 1 times [2020-10-26 19:52:00,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:00,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584189345] [2020-10-26 19:52:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:00,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:02,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:05,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:52:05,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:05,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:05,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:05,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:05,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:05,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:05,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:05,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:05,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:05,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:05,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:05,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:05,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:52:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:05,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:05,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:05,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:05,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:05,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:05,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:05,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:05,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:05,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:05,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-26 19:52:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584189345] [2020-10-26 19:52:05,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:05,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:52:05,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357601304] [2020-10-26 19:52:05,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:52:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:05,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:52:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:52:05,355 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 11 states. [2020-10-26 19:52:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:05,576 INFO L93 Difference]: Finished difference Result 210 states and 259 transitions. [2020-10-26 19:52:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:52:05,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-26 19:52:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:05,579 INFO L225 Difference]: With dead ends: 210 [2020-10-26 19:52:05,579 INFO L226 Difference]: Without dead ends: 163 [2020-10-26 19:52:05,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:52:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-26 19:52:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 70. [2020-10-26 19:52:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:52:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-26 19:52:05,591 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 62 [2020-10-26 19:52:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:05,591 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-26 19:52:05,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:52:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-26 19:52:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:52:05,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:05,593 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:05,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:52:05,593 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1961501129, now seen corresponding path program 2 times [2020-10-26 19:52:05,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:05,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388321179] [2020-10-26 19:52:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:05,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:05,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:08,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:10,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:10,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:52:10,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:10,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:52:10,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:52:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:52:10,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:10,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:10,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:10,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:10,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:10,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:10,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:52:10,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:10,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:10,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:10,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:52:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:10,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:10,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:10,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:10,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:10,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:10,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-26 19:52:10,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388321179] [2020-10-26 19:52:10,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:10,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:52:10,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144851638] [2020-10-26 19:52:10,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:52:10,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:10,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:52:10,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:52:10,807 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 12 states. [2020-10-26 19:52:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:11,092 INFO L93 Difference]: Finished difference Result 235 states and 291 transitions. [2020-10-26 19:52:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:52:11,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-26 19:52:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:11,100 INFO L225 Difference]: With dead ends: 235 [2020-10-26 19:52:11,100 INFO L226 Difference]: Without dead ends: 188 [2020-10-26 19:52:11,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:52:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-26 19:52:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 75. [2020-10-26 19:52:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:52:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-26 19:52:11,122 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 67 [2020-10-26 19:52:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:11,123 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-26 19:52:11,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:52:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-26 19:52:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:52:11,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:11,125 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:11,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:52:11,126 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:11,126 INFO L82 PathProgramCache]: Analyzing trace with hash 232598114, now seen corresponding path program 3 times [2020-10-26 19:52:11,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:11,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613226974] [2020-10-26 19:52:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:11,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:16,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:16,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:52:16,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:16,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:52:16,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:16,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:52:16,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:16,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:52:16,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:16,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:16,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:16,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:16,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:16,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:16,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:52:16,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:16,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:16,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:16,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:16,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:52:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:16,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:16,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:16,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:16,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:16,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:16,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:16,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-26 19:52:16,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613226974] [2020-10-26 19:52:16,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:16,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:52:16,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271943116] [2020-10-26 19:52:16,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:52:16,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:16,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:52:16,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:52:16,351 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 13 states. [2020-10-26 19:52:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:16,707 INFO L93 Difference]: Finished difference Result 243 states and 301 transitions. [2020-10-26 19:52:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:52:16,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-26 19:52:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:16,710 INFO L225 Difference]: With dead ends: 243 [2020-10-26 19:52:16,710 INFO L226 Difference]: Without dead ends: 193 [2020-10-26 19:52:16,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:52:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-26 19:52:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 80. [2020-10-26 19:52:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:52:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-26 19:52:16,727 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 72 [2020-10-26 19:52:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:16,727 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-26 19:52:16,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:52:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-26 19:52:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:52:16,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:16,728 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:16,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:52:16,729 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash -755123547, now seen corresponding path program 4 times [2020-10-26 19:52:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:16,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562883977] [2020-10-26 19:52:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:21,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:52:21,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:21,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:21,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:21,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:21,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:21,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:21,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:21,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:52:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:21,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:21,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:21,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:21,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:21,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:21,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:21,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:21,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:21,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-26 19:52:21,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562883977] [2020-10-26 19:52:21,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:21,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:52:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625809040] [2020-10-26 19:52:21,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:52:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:52:22,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:52:22,004 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 14 states. [2020-10-26 19:52:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:22,262 INFO L93 Difference]: Finished difference Result 251 states and 311 transitions. [2020-10-26 19:52:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:52:22,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-10-26 19:52:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:22,266 INFO L225 Difference]: With dead ends: 251 [2020-10-26 19:52:22,266 INFO L226 Difference]: Without dead ends: 198 [2020-10-26 19:52:22,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:52:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-26 19:52:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 85. [2020-10-26 19:52:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:52:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-10-26 19:52:22,287 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 77 [2020-10-26 19:52:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:22,287 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-10-26 19:52:22,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:52:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-10-26 19:52:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:52:22,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:22,292 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:22,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:52:22,292 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1607573114, now seen corresponding path program 5 times [2020-10-26 19:52:22,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:22,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019589353] [2020-10-26 19:52:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:22,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:22,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:52:27,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:27,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:27,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:27,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:27,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:27,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:52:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:27,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:27,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-10-26 19:52:27,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019589353] [2020-10-26 19:52:27,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:27,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:52:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334566206] [2020-10-26 19:52:27,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:52:27,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:27,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:52:27,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:52:27,558 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 15 states. [2020-10-26 19:52:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:27,813 INFO L93 Difference]: Finished difference Result 259 states and 321 transitions. [2020-10-26 19:52:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:52:27,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2020-10-26 19:52:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:27,816 INFO L225 Difference]: With dead ends: 259 [2020-10-26 19:52:27,816 INFO L226 Difference]: Without dead ends: 203 [2020-10-26 19:52:27,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:52:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-26 19:52:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 90. [2020-10-26 19:52:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:52:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-10-26 19:52:27,836 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 82 [2020-10-26 19:52:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:27,836 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-10-26 19:52:27,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:52:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-10-26 19:52:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:52:27,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:27,837 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:27,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:52:27,838 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1801837695, now seen corresponding path program 6 times [2020-10-26 19:52:27,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:27,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839030236] [2020-10-26 19:52:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:27,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:32,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:52:32,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:32,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:52:32,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:32,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:52:32,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:32,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:52:32,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:33,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:33,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:33,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:33,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:33,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:33,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:33,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:33,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:33,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 19:52:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:33,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:33,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:33,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:33,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:33,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:33,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-10-26 19:52:33,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839030236] [2020-10-26 19:52:33,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:33,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:52:33,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700362525] [2020-10-26 19:52:33,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:52:33,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:33,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:52:33,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:52:33,110 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 16 states. [2020-10-26 19:52:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:33,441 INFO L93 Difference]: Finished difference Result 267 states and 331 transitions. [2020-10-26 19:52:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:52:33,441 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-26 19:52:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:33,443 INFO L225 Difference]: With dead ends: 267 [2020-10-26 19:52:33,443 INFO L226 Difference]: Without dead ends: 208 [2020-10-26 19:52:33,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:52:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-26 19:52:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 95. [2020-10-26 19:52:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:52:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2020-10-26 19:52:33,462 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 87 [2020-10-26 19:52:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:33,463 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2020-10-26 19:52:33,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:52:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2020-10-26 19:52:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:52:33,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:33,464 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:33,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:52:33,464 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash -381556566, now seen corresponding path program 7 times [2020-10-26 19:52:33,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:33,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370502976] [2020-10-26 19:52:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:38,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:52:38,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:38,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-26 19:52:38,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:38,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:52:38,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:38,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:52:38,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:38,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:38,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:38,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:38,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:38,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:38,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:38,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:38,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:38,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:38,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:38,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:52:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:38,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:38,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:38,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:38,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:38,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:38,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:38,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2020-10-26 19:52:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370502976] [2020-10-26 19:52:38,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:38,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:52:38,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072822937] [2020-10-26 19:52:38,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:52:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:52:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:52:38,796 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand 17 states. [2020-10-26 19:52:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:39,117 INFO L93 Difference]: Finished difference Result 275 states and 341 transitions. [2020-10-26 19:52:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:52:39,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-10-26 19:52:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:39,119 INFO L225 Difference]: With dead ends: 275 [2020-10-26 19:52:39,119 INFO L226 Difference]: Without dead ends: 213 [2020-10-26 19:52:39,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:52:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-26 19:52:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 100. [2020-10-26 19:52:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:52:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-10-26 19:52:39,144 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 92 [2020-10-26 19:52:39,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:39,144 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-10-26 19:52:39,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:52:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-10-26 19:52:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:52:39,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:39,146 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:39,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:52:39,146 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:39,147 INFO L82 PathProgramCache]: Analyzing trace with hash -183952291, now seen corresponding path program 8 times [2020-10-26 19:52:39,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:39,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365468624] [2020-10-26 19:52:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:39,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:44,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:52:44,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:44,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:44,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:44,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:44,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:44,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:44,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:52:44,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:44,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:44,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:52:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:44,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-26 19:52:44,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365468624] [2020-10-26 19:52:44,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:44,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:52:44,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074709884] [2020-10-26 19:52:44,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:52:44,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:44,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:52:44,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:52:44,526 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 18 states. [2020-10-26 19:52:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:44,834 INFO L93 Difference]: Finished difference Result 283 states and 351 transitions. [2020-10-26 19:52:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:52:44,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 97 [2020-10-26 19:52:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:44,837 INFO L225 Difference]: With dead ends: 283 [2020-10-26 19:52:44,837 INFO L226 Difference]: Without dead ends: 218 [2020-10-26 19:52:44,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:52:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-26 19:52:44,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 105. [2020-10-26 19:52:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:52:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2020-10-26 19:52:44,870 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 97 [2020-10-26 19:52:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:44,870 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2020-10-26 19:52:44,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:52:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2020-10-26 19:52:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:52:44,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:44,872 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:44,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:52:44,872 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash -494010418, now seen corresponding path program 9 times [2020-10-26 19:52:44,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:44,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958137225] [2020-10-26 19:52:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:44,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:44,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:49,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:52:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:50,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:50,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:50,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:50,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:50,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:50,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:50,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:50,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:50,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:50,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:50,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:52:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:50,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:50,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:50,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:50,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:50,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:50,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:50,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:50,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:50,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:50,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2020-10-26 19:52:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958137225] [2020-10-26 19:52:50,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:50,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:52:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667280978] [2020-10-26 19:52:50,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:52:50,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:52:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:52:50,245 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand 19 states. [2020-10-26 19:52:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:50,654 INFO L93 Difference]: Finished difference Result 291 states and 361 transitions. [2020-10-26 19:52:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:52:50,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2020-10-26 19:52:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:50,657 INFO L225 Difference]: With dead ends: 291 [2020-10-26 19:52:50,657 INFO L226 Difference]: Without dead ends: 223 [2020-10-26 19:52:50,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:52:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-26 19:52:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 110. [2020-10-26 19:52:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:52:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-10-26 19:52:50,685 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 102 [2020-10-26 19:52:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:50,685 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-10-26 19:52:50,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:52:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-10-26 19:52:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:52:50,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:50,687 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:50,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:52:50,687 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1659607751, now seen corresponding path program 10 times [2020-10-26 19:52:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:50,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293575012] [2020-10-26 19:52:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:50,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:50,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:55,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:55,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:52:55,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:55,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-26 19:52:55,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:55,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:52:55,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:52:55,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:52:55,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:56,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:56,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:56,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:56,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:56,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-26 19:52:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:56,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:56,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:56,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2020-10-26 19:52:56,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293575012] [2020-10-26 19:52:56,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:56,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:52:56,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596243811] [2020-10-26 19:52:56,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:52:56,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:56,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:52:56,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:52:56,092 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 20 states. [2020-10-26 19:52:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:56,539 INFO L93 Difference]: Finished difference Result 299 states and 371 transitions. [2020-10-26 19:52:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:52:56,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 107 [2020-10-26 19:52:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:56,545 INFO L225 Difference]: With dead ends: 299 [2020-10-26 19:52:56,545 INFO L226 Difference]: Without dead ends: 228 [2020-10-26 19:52:56,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:52:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-26 19:52:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2020-10-26 19:52:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:52:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2020-10-26 19:52:56,575 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 107 [2020-10-26 19:52:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:56,575 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2020-10-26 19:52:56,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:52:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2020-10-26 19:52:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:52:56,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:56,576 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:56,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:52:56,577 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1778968306, now seen corresponding path program 11 times [2020-10-26 19:52:56,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:56,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514979753] [2020-10-26 19:52:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:56,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:01,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:01,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:53:01,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:01,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-26 19:53:01,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:53:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:01,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:53:01,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:02,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:02,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:02,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:02,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:02,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:02,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:02,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:02,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:02,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:02,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:02,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:02,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 19:53:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:02,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:02,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2020-10-26 19:53:02,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514979753] [2020-10-26 19:53:02,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:02,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:53:02,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541000723] [2020-10-26 19:53:02,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:53:02,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:53:02,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:53:02,032 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand 21 states. [2020-10-26 19:53:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:02,504 INFO L93 Difference]: Finished difference Result 307 states and 381 transitions. [2020-10-26 19:53:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:53:02,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 112 [2020-10-26 19:53:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:02,508 INFO L225 Difference]: With dead ends: 307 [2020-10-26 19:53:02,508 INFO L226 Difference]: Without dead ends: 233 [2020-10-26 19:53:02,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:53:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-26 19:53:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 120. [2020-10-26 19:53:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:53:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-10-26 19:53:02,545 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 112 [2020-10-26 19:53:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:02,545 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-10-26 19:53:02,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:53:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-10-26 19:53:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:53:02,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:02,547 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:02,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:53:02,547 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:02,548 INFO L82 PathProgramCache]: Analyzing trace with hash -16400875, now seen corresponding path program 12 times [2020-10-26 19:53:02,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:02,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776362919] [2020-10-26 19:53:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:02,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:02,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:07,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:07,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:53:07,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 19:53:07,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:53:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:07,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:53:07,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:08,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:53:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:08,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:08,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:08,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:08,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:08,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:08,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:08,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-26 19:53:08,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776362919] [2020-10-26 19:53:08,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:08,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:53:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777298364] [2020-10-26 19:53:08,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:53:08,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:53:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:53:08,029 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 22 states. [2020-10-26 19:53:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:08,561 INFO L93 Difference]: Finished difference Result 315 states and 391 transitions. [2020-10-26 19:53:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:53:08,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 117 [2020-10-26 19:53:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:08,564 INFO L225 Difference]: With dead ends: 315 [2020-10-26 19:53:08,564 INFO L226 Difference]: Without dead ends: 238 [2020-10-26 19:53:08,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:53:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-26 19:53:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 125. [2020-10-26 19:53:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:53:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-10-26 19:53:08,598 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 117 [2020-10-26 19:53:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:08,598 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-10-26 19:53:08,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:53:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-10-26 19:53:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:53:08,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:08,600 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:08,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:53:08,600 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:08,601 INFO L82 PathProgramCache]: Analyzing trace with hash -433529322, now seen corresponding path program 13 times [2020-10-26 19:53:08,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:08,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355025475] [2020-10-26 19:53:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:08,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:13,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:13,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:53:13,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:13,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-26 19:53:13,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:13,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:53:13,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:13,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:53:13,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:14,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:14,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:14,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:14,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:14,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:53:14,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:14,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:14,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:14,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:53:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:14,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:14,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:14,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:14,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:53:14,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:14,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-10-26 19:53:14,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355025475] [2020-10-26 19:53:14,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:14,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:53:14,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160756170] [2020-10-26 19:53:14,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:53:14,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:53:14,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:53:14,162 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 23 states. [2020-10-26 19:53:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:14,684 INFO L93 Difference]: Finished difference Result 323 states and 401 transitions. [2020-10-26 19:53:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:53:14,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 122 [2020-10-26 19:53:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:14,687 INFO L225 Difference]: With dead ends: 323 [2020-10-26 19:53:14,687 INFO L226 Difference]: Without dead ends: 243 [2020-10-26 19:53:14,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:53:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-26 19:53:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 130. [2020-10-26 19:53:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:53:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2020-10-26 19:53:14,734 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 122 [2020-10-26 19:53:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:14,734 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2020-10-26 19:53:14,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:53:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2020-10-26 19:53:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 19:53:14,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:14,736 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:14,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:53:14,736 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1297684751, now seen corresponding path program 14 times [2020-10-26 19:53:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:14,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072097468] [2020-10-26 19:53:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:19,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:19,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:53:19,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:19,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:53:19,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:19,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:53:19,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:20,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-26 19:53:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:20,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:20,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:20,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:20,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:20,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:20,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:20,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:20,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2020-10-26 19:53:20,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072097468] [2020-10-26 19:53:20,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:20,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:53:20,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438272539] [2020-10-26 19:53:20,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:53:20,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:20,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:53:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:53:20,229 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 24 states. [2020-10-26 19:53:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:20,815 INFO L93 Difference]: Finished difference Result 331 states and 411 transitions. [2020-10-26 19:53:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:53:20,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2020-10-26 19:53:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:20,818 INFO L225 Difference]: With dead ends: 331 [2020-10-26 19:53:20,818 INFO L226 Difference]: Without dead ends: 248 [2020-10-26 19:53:20,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:53:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-26 19:53:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 135. [2020-10-26 19:53:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-26 19:53:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2020-10-26 19:53:20,869 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 127 [2020-10-26 19:53:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:20,869 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2020-10-26 19:53:20,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:53:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2020-10-26 19:53:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:53:20,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:20,871 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:20,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:53:20,871 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash -370924230, now seen corresponding path program 15 times [2020-10-26 19:53:20,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:20,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777805425] [2020-10-26 19:53:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:20,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:20,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:25,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:25,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:53:25,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:25,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-26 19:53:25,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:25,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:53:25,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:25,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:53:25,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:26,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:26,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:26,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:26,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:26,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:26,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:26,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:26,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:26,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:26,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-26 19:53:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:26,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:26,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:26,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:26,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:26,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:26,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:26,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:26,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:26,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:26,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2020-10-26 19:53:26,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777805425] [2020-10-26 19:53:26,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:26,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:53:26,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541650226] [2020-10-26 19:53:26,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:53:26,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:53:26,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:53:26,436 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand 25 states. [2020-10-26 19:53:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:26,886 INFO L93 Difference]: Finished difference Result 339 states and 421 transitions. [2020-10-26 19:53:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:53:26,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 132 [2020-10-26 19:53:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:26,888 INFO L225 Difference]: With dead ends: 339 [2020-10-26 19:53:26,888 INFO L226 Difference]: Without dead ends: 253 [2020-10-26 19:53:26,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:53:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-26 19:53:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 140. [2020-10-26 19:53:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-26 19:53:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2020-10-26 19:53:26,942 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 132 [2020-10-26 19:53:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:26,942 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2020-10-26 19:53:26,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:53:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2020-10-26 19:53:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:53:26,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:26,944 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:26,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:53:26,945 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -784228403, now seen corresponding path program 16 times [2020-10-26 19:53:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:26,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186753308] [2020-10-26 19:53:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:27,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:31,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 19:53:31,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:31,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:53:31,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:31,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:53:31,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:31,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:53:31,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:32,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:32,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:32,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:32,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:32,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:32,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:32,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 19:53:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:32,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:32,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:32,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:32,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:32,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:32,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:32,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:32,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:32,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2020-10-26 19:53:32,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186753308] [2020-10-26 19:53:32,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:32,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:53:32,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559549765] [2020-10-26 19:53:32,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:53:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:53:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:53:32,503 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand 26 states. [2020-10-26 19:53:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:33,092 INFO L93 Difference]: Finished difference Result 347 states and 431 transitions. [2020-10-26 19:53:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:53:33,093 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 137 [2020-10-26 19:53:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:33,095 INFO L225 Difference]: With dead ends: 347 [2020-10-26 19:53:33,095 INFO L226 Difference]: Without dead ends: 258 [2020-10-26 19:53:33,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:53:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-26 19:53:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 145. [2020-10-26 19:53:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-26 19:53:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2020-10-26 19:53:33,162 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 137 [2020-10-26 19:53:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:33,162 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2020-10-26 19:53:33,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:53:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2020-10-26 19:53:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 19:53:33,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:33,164 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:33,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:53:33,165 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:33,165 INFO L82 PathProgramCache]: Analyzing trace with hash -659489698, now seen corresponding path program 17 times [2020-10-26 19:53:33,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:33,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634891284] [2020-10-26 19:53:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:33,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:33,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:38,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:53:38,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:38,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:38,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:38,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:38,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-26 19:53:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:38,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2020-10-26 19:53:38,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634891284] [2020-10-26 19:53:38,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:38,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:53:38,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480374719] [2020-10-26 19:53:38,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:53:38,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:53:38,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:53:38,851 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 27 states. [2020-10-26 19:53:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:39,458 INFO L93 Difference]: Finished difference Result 355 states and 441 transitions. [2020-10-26 19:53:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:53:39,458 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 142 [2020-10-26 19:53:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:39,460 INFO L225 Difference]: With dead ends: 355 [2020-10-26 19:53:39,461 INFO L226 Difference]: Without dead ends: 263 [2020-10-26 19:53:39,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:53:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-26 19:53:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 150. [2020-10-26 19:53:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:53:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 176 transitions. [2020-10-26 19:53:39,543 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 176 transitions. Word has length 142 [2020-10-26 19:53:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:39,543 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 176 transitions. [2020-10-26 19:53:39,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:53:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 176 transitions. [2020-10-26 19:53:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 19:53:39,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:39,553 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:39,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:53:39,554 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1369417897, now seen corresponding path program 18 times [2020-10-26 19:53:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:39,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964818888] [2020-10-26 19:53:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:39,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:44,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:44,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:53:44,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:44,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5307 [2020-10-26 19:53:44,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:44,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:53:44,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:44,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:53:44,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:45,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:45,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:45,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:45,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:45,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:45,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:45,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:45,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-10-26 19:53:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:45,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:45,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:45,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:45,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:45,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:45,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:45,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-26 19:53:45,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964818888] [2020-10-26 19:53:45,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:45,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:53:45,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953605782] [2020-10-26 19:53:45,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:53:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:53:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:53:45,502 INFO L87 Difference]: Start difference. First operand 150 states and 176 transitions. Second operand 28 states. [2020-10-26 19:53:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:46,155 INFO L93 Difference]: Finished difference Result 363 states and 451 transitions. [2020-10-26 19:53:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:53:46,155 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2020-10-26 19:53:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:46,158 INFO L225 Difference]: With dead ends: 363 [2020-10-26 19:53:46,158 INFO L226 Difference]: Without dead ends: 268 [2020-10-26 19:53:46,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:53:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-26 19:53:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 155. [2020-10-26 19:53:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-26 19:53:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2020-10-26 19:53:46,235 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 147 [2020-10-26 19:53:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:46,235 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2020-10-26 19:53:46,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:53:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2020-10-26 19:53:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-26 19:53:46,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:46,237 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:46,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:53:46,237 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1970953342, now seen corresponding path program 19 times [2020-10-26 19:53:46,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:46,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137242014] [2020-10-26 19:53:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:46,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5166 [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:53:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:52,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:52,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:52,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:52,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:52,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:52,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:52,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:52,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:53:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:52,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:52,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:52,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:52,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:52,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:52,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2020-10-26 19:53:52,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137242014] [2020-10-26 19:53:52,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:52,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:53:52,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745064223] [2020-10-26 19:53:52,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:53:52,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:52,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:53:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:53:52,077 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand 29 states. [2020-10-26 19:53:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:52,751 INFO L93 Difference]: Finished difference Result 371 states and 461 transitions. [2020-10-26 19:53:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:53:52,752 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 152 [2020-10-26 19:53:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:52,754 INFO L225 Difference]: With dead ends: 371 [2020-10-26 19:53:52,754 INFO L226 Difference]: Without dead ends: 273 [2020-10-26 19:53:52,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:53:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-26 19:53:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 160. [2020-10-26 19:53:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-26 19:53:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2020-10-26 19:53:52,838 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 152 [2020-10-26 19:53:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:52,839 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2020-10-26 19:53:52,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:53:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2020-10-26 19:53:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:53:52,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:52,840 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:52,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:53:52,840 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:52,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1678426501, now seen corresponding path program 20 times [2020-10-26 19:53:52,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:52,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020713538] [2020-10-26 19:53:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:52,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:58,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:53:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:58,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:58,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:58,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:58,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-10-26 19:53:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:58,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:58,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:58,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2020-10-26 19:53:58,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020713538] [2020-10-26 19:53:58,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:58,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:53:58,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407365643] [2020-10-26 19:53:58,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:53:58,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:58,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:53:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:53:58,639 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand 30 states. [2020-10-26 19:53:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:59,459 INFO L93 Difference]: Finished difference Result 379 states and 471 transitions. [2020-10-26 19:53:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:53:59,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2020-10-26 19:53:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:59,462 INFO L225 Difference]: With dead ends: 379 [2020-10-26 19:53:59,462 INFO L226 Difference]: Without dead ends: 278 [2020-10-26 19:53:59,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:53:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-26 19:53:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 165. [2020-10-26 19:53:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-26 19:53:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 194 transitions. [2020-10-26 19:53:59,531 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 194 transitions. Word has length 157 [2020-10-26 19:53:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:59,532 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 194 transitions. [2020-10-26 19:53:59,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:53:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 194 transitions. [2020-10-26 19:53:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:53:59,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:59,533 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:59,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:53:59,533 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:59,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:59,534 INFO L82 PathProgramCache]: Analyzing trace with hash -271033690, now seen corresponding path program 21 times [2020-10-26 19:53:59,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:59,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596674799] [2020-10-26 19:53:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:59,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:04,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:04,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-26 19:54:04,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:04,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:54:04,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:54:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:04,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:54:04,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:05,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:05,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:05,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:05,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-26 19:54:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:05,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:05,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:05,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:05,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:05,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:05,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1814 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-26 19:54:05,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596674799] [2020-10-26 19:54:05,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:05,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:54:05,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021837880] [2020-10-26 19:54:05,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:54:05,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:54:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:54:05,263 INFO L87 Difference]: Start difference. First operand 165 states and 194 transitions. Second operand 31 states. [2020-10-26 19:54:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:06,002 INFO L93 Difference]: Finished difference Result 387 states and 481 transitions. [2020-10-26 19:54:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:54:06,002 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2020-10-26 19:54:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:06,004 INFO L225 Difference]: With dead ends: 387 [2020-10-26 19:54:06,004 INFO L226 Difference]: Without dead ends: 283 [2020-10-26 19:54:06,005 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 [2020-10-26 19:54:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-26 19:54:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 170. [2020-10-26 19:54:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:54:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 200 transitions. [2020-10-26 19:54:06,074 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 200 transitions. Word has length 162 [2020-10-26 19:54:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:06,075 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 200 transitions. [2020-10-26 19:54:06,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:54:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 200 transitions. [2020-10-26 19:54:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 19:54:06,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:06,076 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:06,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:54:06,076 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:06,076 INFO L82 PathProgramCache]: Analyzing trace with hash -833836447, now seen corresponding path program 22 times [2020-10-26 19:54:06,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:06,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787266915] [2020-10-26 19:54:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:06,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:06,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:11,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 19:54:11,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:11,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:54:11,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:11,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:54:11,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:11,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:54:11,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:11,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:11,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:11,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:11,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-10-26 19:54:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:11,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:11,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:11,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:11,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:11,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:11,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:11,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:11,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2020-10-26 19:54:11,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787266915] [2020-10-26 19:54:11,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:11,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:54:11,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234683380] [2020-10-26 19:54:11,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:54:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:11,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:54:11,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:54:11,835 INFO L87 Difference]: Start difference. First operand 170 states and 200 transitions. Second operand 32 states. [2020-10-26 19:54:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:12,615 INFO L93 Difference]: Finished difference Result 395 states and 491 transitions. [2020-10-26 19:54:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:54:12,616 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 167 [2020-10-26 19:54:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:12,618 INFO L225 Difference]: With dead ends: 395 [2020-10-26 19:54:12,618 INFO L226 Difference]: Without dead ends: 288 [2020-10-26 19:54:12,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:54:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-26 19:54:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 175. [2020-10-26 19:54:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-26 19:54:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 206 transitions. [2020-10-26 19:54:12,754 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 206 transitions. Word has length 167 [2020-10-26 19:54:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:12,754 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 206 transitions. [2020-10-26 19:54:12,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:54:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 206 transitions. [2020-10-26 19:54:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 19:54:12,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:12,756 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:54:12,756 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1247845942, now seen corresponding path program 23 times [2020-10-26 19:54:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:12,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292391466] [2020-10-26 19:54:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:12,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:12,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:17,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:54:17,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:18,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:18,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:18,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:18,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:18,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:18,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:18,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:18,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:18,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:18,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:18,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:18,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 19:54:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:18,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:18,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:18,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:18,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:18,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:18,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:18,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:18,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:18,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:18,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-26 19:54:18,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292391466] [2020-10-26 19:54:18,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:18,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:54:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166888622] [2020-10-26 19:54:18,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:54:18,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:54:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:54:18,669 INFO L87 Difference]: Start difference. First operand 175 states and 206 transitions. Second operand 33 states. [2020-10-26 19:54:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:19,497 INFO L93 Difference]: Finished difference Result 403 states and 501 transitions. [2020-10-26 19:54:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:54:19,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 172 [2020-10-26 19:54:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:19,500 INFO L225 Difference]: With dead ends: 403 [2020-10-26 19:54:19,500 INFO L226 Difference]: Without dead ends: 293 [2020-10-26 19:54:19,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:54:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-26 19:54:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 180. [2020-10-26 19:54:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-26 19:54:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 212 transitions. [2020-10-26 19:54:19,591 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 212 transitions. Word has length 172 [2020-10-26 19:54:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:19,591 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 212 transitions. [2020-10-26 19:54:19,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:54:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 212 transitions. [2020-10-26 19:54:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 19:54:19,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:19,592 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:19,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:54:19,593 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1202660157, now seen corresponding path program 24 times [2020-10-26 19:54:19,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:19,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555546464] [2020-10-26 19:54:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:19,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:19,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:24,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:24,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-26 19:54:24,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:24,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-26 19:54:24,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:24,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:54:24,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:24,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:54:24,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:25,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:25,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:25,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:25,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:25,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:25,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:25,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:25,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-10-26 19:54:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:25,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:25,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:25,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:25,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:25,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:25,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2020-10-26 19:54:25,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555546464] [2020-10-26 19:54:25,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:25,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:54:25,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613758002] [2020-10-26 19:54:25,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:54:25,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:54:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:54:25,531 INFO L87 Difference]: Start difference. First operand 180 states and 212 transitions. Second operand 34 states. [2020-10-26 19:54:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:26,521 INFO L93 Difference]: Finished difference Result 411 states and 511 transitions. [2020-10-26 19:54:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:54:26,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 177 [2020-10-26 19:54:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:26,524 INFO L225 Difference]: With dead ends: 411 [2020-10-26 19:54:26,524 INFO L226 Difference]: Without dead ends: 298 [2020-10-26 19:54:26,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:54:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-26 19:54:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 185. [2020-10-26 19:54:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-26 19:54:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 218 transitions. [2020-10-26 19:54:26,642 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 218 transitions. Word has length 177 [2020-10-26 19:54:26,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:26,642 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 218 transitions. [2020-10-26 19:54:26,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:54:26,642 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 218 transitions. [2020-10-26 19:54:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 19:54:26,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:26,643 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:26,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:54:26,644 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash -380569362, now seen corresponding path program 25 times [2020-10-26 19:54:26,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:26,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607407050] [2020-10-26 19:54:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:26,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:26,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:31,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:31,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 19:54:31,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:31,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-26 19:54:31,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:31,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:54:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:54:31,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:54:32,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:32,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:32,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:32,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:32,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:32,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:32,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:32,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:54:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:32,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2392 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 1429 trivial. 0 not checked. [2020-10-26 19:54:32,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607407050] [2020-10-26 19:54:32,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:32,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:54:32,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669026477] [2020-10-26 19:54:32,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:54:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:54:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:54:32,701 INFO L87 Difference]: Start difference. First operand 185 states and 218 transitions. Second operand 35 states. [2020-10-26 19:54:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:33,472 INFO L93 Difference]: Finished difference Result 419 states and 521 transitions. [2020-10-26 19:54:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:54:33,473 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 182 [2020-10-26 19:54:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:33,475 INFO L225 Difference]: With dead ends: 419 [2020-10-26 19:54:33,475 INFO L226 Difference]: Without dead ends: 303 [2020-10-26 19:54:33,477 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 [2020-10-26 19:54:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-26 19:54:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 190. [2020-10-26 19:54:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-26 19:54:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 224 transitions. [2020-10-26 19:54:33,590 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 224 transitions. Word has length 182 [2020-10-26 19:54:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:33,590 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 224 transitions. [2020-10-26 19:54:33,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:54:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 224 transitions. [2020-10-26 19:54:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 19:54:33,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:33,591 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:33,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:54:33,591 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash -721687527, now seen corresponding path program 26 times [2020-10-26 19:54:33,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:33,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938688672] [2020-10-26 19:54:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:33,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:54:38,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:39,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:39,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:39,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:39,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:39,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:39,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:39,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:39,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:39,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-10-26 19:54:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:39,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:39,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2549 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-10-26 19:54:39,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938688672] [2020-10-26 19:54:39,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:39,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:54:39,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619139091] [2020-10-26 19:54:39,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:54:39,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:39,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:54:39,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:54:39,719 INFO L87 Difference]: Start difference. First operand 190 states and 224 transitions. Second operand 36 states. [2020-10-26 19:54:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:40,826 INFO L93 Difference]: Finished difference Result 427 states and 531 transitions. [2020-10-26 19:54:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:54:40,827 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 187 [2020-10-26 19:54:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:40,829 INFO L225 Difference]: With dead ends: 427 [2020-10-26 19:54:40,830 INFO L226 Difference]: Without dead ends: 308 [2020-10-26 19:54:40,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:54:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-26 19:54:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 195. [2020-10-26 19:54:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-26 19:54:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 230 transitions. [2020-10-26 19:54:40,980 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 230 transitions. Word has length 187 [2020-10-26 19:54:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:40,980 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 230 transitions. [2020-10-26 19:54:40,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:54:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 230 transitions. [2020-10-26 19:54:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-26 19:54:40,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:40,982 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:40,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:54:40,982 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1662820334, now seen corresponding path program 27 times [2020-10-26 19:54:40,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:40,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734552157] [2020-10-26 19:54:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:41,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:46,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5194 [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:54:46,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:47,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:47,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:47,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:47,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:47,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:47,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:47,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:47,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:47,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-10-26 19:54:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:47,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:47,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:47,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2711 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2020-10-26 19:54:47,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734552157] [2020-10-26 19:54:47,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:47,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:54:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303256857] [2020-10-26 19:54:47,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:54:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:54:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:54:47,158 INFO L87 Difference]: Start difference. First operand 195 states and 230 transitions. Second operand 37 states. [2020-10-26 19:54:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:47,970 INFO L93 Difference]: Finished difference Result 435 states and 541 transitions. [2020-10-26 19:54:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:54:47,971 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 192 [2020-10-26 19:54:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:47,973 INFO L225 Difference]: With dead ends: 435 [2020-10-26 19:54:47,973 INFO L226 Difference]: Without dead ends: 313 [2020-10-26 19:54:47,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:54:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-26 19:54:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 200. [2020-10-26 19:54:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-26 19:54:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2020-10-26 19:54:48,096 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 192 [2020-10-26 19:54:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:48,097 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2020-10-26 19:54:48,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:54:48,097 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2020-10-26 19:54:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 19:54:48,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:48,098 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:48,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:54:48,098 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:48,098 INFO L82 PathProgramCache]: Analyzing trace with hash 612156661, now seen corresponding path program 28 times [2020-10-26 19:54:48,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:48,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553765315] [2020-10-26 19:54:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:48,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:48,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:53,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:53,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 19:54:53,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:53,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-26 19:54:53,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:53,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:54:53,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:54:53,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:54:53,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:54,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:54,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:54,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:54,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-10-26 19:54:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:54,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:54,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:54,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:54:54,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:54:54,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:54,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2878 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2020-10-26 19:54:54,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553765315] [2020-10-26 19:54:54,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:54,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:54:54,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616408986] [2020-10-26 19:54:54,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:54:54,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:54,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:54:54,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:54:54,232 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand 38 states. [2020-10-26 19:54:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:55,230 INFO L93 Difference]: Finished difference Result 443 states and 551 transitions. [2020-10-26 19:54:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:54:55,230 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2020-10-26 19:54:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:55,233 INFO L225 Difference]: With dead ends: 443 [2020-10-26 19:54:55,233 INFO L226 Difference]: Without dead ends: 318 [2020-10-26 19:54:55,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:54:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-26 19:54:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 205. [2020-10-26 19:54:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-26 19:54:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 242 transitions. [2020-10-26 19:54:55,393 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 242 transitions. Word has length 197 [2020-10-26 19:54:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:55,393 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 242 transitions. [2020-10-26 19:54:55,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:54:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 242 transitions. [2020-10-26 19:54:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:54:55,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:55,395 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:55,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:54:55,395 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:55,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:55,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1966287050, now seen corresponding path program 29 times [2020-10-26 19:54:55,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:55,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602578792] [2020-10-26 19:54:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:55,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking...