/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-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:17:35,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:17:35,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:17:35,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:17:35,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:17:35,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:17:35,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:17:35,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:17:35,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:17:35,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:17:35,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:17:35,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:17:35,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:17:35,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:17:35,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:17:35,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:17:35,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:17:35,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:17:35,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:17:35,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:17:35,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:17:35,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:17:35,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:17:35,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:17:35,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:17:35,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:17:35,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:17:35,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:17:35,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:17:35,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:17:35,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:17:35,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:17:35,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:17:35,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:17:35,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:17:35,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:17:35,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:17:35,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:17:35,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:17:35,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:17:35,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:17:35,879 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 19:17:35,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:17:35,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:17:35,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:17:35,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:17:35,932 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:17:35,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:17:35,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:17:35,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:17:35,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:17:35,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:17:35,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:17:35,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:17:35,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:17:35,935 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:17:35,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:17:35,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:17:35,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:17:35,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:17:35,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:17:35,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:17:35,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:17:35,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:17:35,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:17:35,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:17:35,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:17:35,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:17:35,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:17:35,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:17:35,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:17:35,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:17:36,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:17:36,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:17:36,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:17:36,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:17:36,394 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:17:36,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-26 19:17:36,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b7dffd29/2eab2068f7b24ef39f4ef4cf63da4501/FLAGd75fcbfa7 [2020-10-26 19:17:37,262 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:17:37,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-26 19:17:37,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b7dffd29/2eab2068f7b24ef39f4ef4cf63da4501/FLAGd75fcbfa7 [2020-10-26 19:17:37,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b7dffd29/2eab2068f7b24ef39f4ef4cf63da4501 [2020-10-26 19:17:37,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:17:37,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:17:37,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:37,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:17:37,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:17:37,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478bda4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37, skipping insertion in model container [2020-10-26 19:17:37,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:17:37,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:17:37,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:37,850 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:17:37,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:37,892 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:17:37,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37 WrapperNode [2020-10-26 19:17:37,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:37,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:17:37,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:17:37,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:17:37,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (1/1) ... [2020-10-26 19:17:37,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:17:37,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:17:37,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:17:37,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:17:37,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (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 19:17:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:17:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:17:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:17:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:17:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:17:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:17:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:17:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:17:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:17:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:17:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:17:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:17:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:17:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:17:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:17:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:17:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:17:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:17:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:17:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:17:38,666 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:17:38,667 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 19:17:38,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:38 BoogieIcfgContainer [2020-10-26 19:17:38,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:17:38,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:17:38,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:17:38,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:17:38,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:17:37" (1/3) ... [2020-10-26 19:17:38,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1387cabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:38, skipping insertion in model container [2020-10-26 19:17:38,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:37" (2/3) ... [2020-10-26 19:17:38,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1387cabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:38, skipping insertion in model container [2020-10-26 19:17:38,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:38" (3/3) ... [2020-10-26 19:17:38,682 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2020-10-26 19:17:38,696 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:17:38,703 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:17:38,718 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:17:38,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:17:38,763 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:17:38,763 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:17:38,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:17:38,764 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:17:38,764 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:17:38,764 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:17:38,764 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:17:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-26 19:17:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:17:38,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:38,799 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 19:17:38,800 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash 340893040, now seen corresponding path program 1 times [2020-10-26 19:17:38,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:38,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462090429] [2020-10-26 19:17:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:39,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:39,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:17:39,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:17:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-26 19:17:39,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:17:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:39,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:17:39,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:39,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:39,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:39,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:39,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:39,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:17:39,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:39,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:39,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:39,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:39,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:39,803 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 19:17:39,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462090429] [2020-10-26 19:17:39,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:39,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:17:39,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34420927] [2020-10-26 19:17:39,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:17:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:39,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:17:39,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:17:39,830 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-26 19:17:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:39,958 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2020-10-26 19:17:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:17:39,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-26 19:17:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:39,969 INFO L225 Difference]: With dead ends: 71 [2020-10-26 19:17:39,970 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:17:39,974 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 19:17:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:17:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-26 19:17:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:17:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-26 19:17:40,021 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-26 19:17:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:40,021 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-26 19:17:40,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:17:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-26 19:17:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:17:40,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:40,023 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 19:17:40,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:17:40,024 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2116011230, now seen corresponding path program 1 times [2020-10-26 19:17:40,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:40,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451128070] [2020-10-26 19:17:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:40,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:41,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:41,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:17:41,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:17:41,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-26 19:17:41,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:41,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:17:41,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:17:41,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:17:41,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:41,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:41,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:41,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:41,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:17:41,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:41,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:41,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:41,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:17:41,197 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 19:17:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451128070] [2020-10-26 19:17:41,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:41,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:17:41,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894905014] [2020-10-26 19:17:41,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:17:41,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:41,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:17:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:17:41,211 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 4 states. [2020-10-26 19:17:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:41,340 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-26 19:17:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:17:41,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-26 19:17:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:41,342 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:17:41,342 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:17:41,343 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 19:17:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:17:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-26 19:17:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:17:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-26 19:17:41,352 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-10-26 19:17:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:41,353 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-26 19:17:41,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:17:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-26 19:17:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:17:41,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:41,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:41,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:17:41,355 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:41,356 INFO L82 PathProgramCache]: Analyzing trace with hash -423807940, now seen corresponding path program 1 times [2020-10-26 19:17:41,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:41,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261175317] [2020-10-26 19:17:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:41,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:41,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:41,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:42,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:17:42,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:17:42,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-26 19:17:42,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:42,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:17:42,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:42,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:17:42,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:42,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:42,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:42,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:42,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:42,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:17:42,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:42,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:42,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:42,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261175317] [2020-10-26 19:17:42,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:42,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:17:42,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611418092] [2020-10-26 19:17:42,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:17:42,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:17:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:17:42,661 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-10-26 19:17:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:42,767 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-26 19:17:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:17:42,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-26 19:17:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:42,769 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:17:42,769 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:17:42,770 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 19:17:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:17:42,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-26 19:17:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:17:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-26 19:17:42,778 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2020-10-26 19:17:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:42,778 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-26 19:17:42,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:17:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-26 19:17:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:17:42,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:42,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:42,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:17:42,780 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1648606182, now seen corresponding path program 2 times [2020-10-26 19:17:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:42,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723295819] [2020-10-26 19:17:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:42,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:42,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:44,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:17:44,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:17:44,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-26 19:17:44,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:44,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:17:44,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:44,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:17:44,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:44,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:17:44,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:44,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:44,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:44,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723295819] [2020-10-26 19:17:44,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:44,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:17:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233518249] [2020-10-26 19:17:44,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:17:44,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:17:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:17:44,772 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-10-26 19:17:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:44,887 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-26 19:17:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:17:44,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-26 19:17:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:44,889 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:17:44,889 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:17:44,890 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 19:17:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:17:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:17:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:17:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-26 19:17:44,899 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2020-10-26 19:17:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:44,899 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-26 19:17:44,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:17:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-26 19:17:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:17:44,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:44,901 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:44,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:17:44,901 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1858677640, now seen corresponding path program 3 times [2020-10-26 19:17:44,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:44,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879167989] [2020-10-26 19:17:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:44,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:44,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:47,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:17:47,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:17:47,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2589 [2020-10-26 19:17:47,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:47,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:17:47,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:47,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:17:47,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:47,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:47,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:47,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:47,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:17:47,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:47,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879167989] [2020-10-26 19:17:47,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:47,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:17:47,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550401817] [2020-10-26 19:17:47,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:17:47,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:47,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:17:47,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:17:47,592 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 7 states. [2020-10-26 19:17:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:47,693 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-26 19:17:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:17:47,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-26 19:17:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:47,695 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:17:47,695 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:17:47,696 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 19:17:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:17:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:17:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:17:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-26 19:17:47,704 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-10-26 19:17:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:47,704 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-26 19:17:47,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:17:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-26 19:17:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:17:47,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:47,706 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:47,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:17:47,706 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:47,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1873885866, now seen corresponding path program 4 times [2020-10-26 19:17:47,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:47,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494662066] [2020-10-26 19:17:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:47,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:51,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:17:51,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:17:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3474 [2020-10-26 19:17:51,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:17:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:17:51,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:51,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:51,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:51,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:51,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:51,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:17:51,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:51,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:51,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:51,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494662066] [2020-10-26 19:17:51,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:51,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:17:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397975637] [2020-10-26 19:17:51,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:17:51,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:51,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:17:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:17:51,296 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-26 19:17:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:51,464 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-26 19:17:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:17:51,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-26 19:17:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:51,467 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:17:51,467 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:17:51,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:17:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:17:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-26 19:17:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:17:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-26 19:17:51,482 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 31 [2020-10-26 19:17:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:51,483 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-26 19:17:51,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:17:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-26 19:17:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:17:51,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:51,484 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:51,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:17:51,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash 690878132, now seen corresponding path program 5 times [2020-10-26 19:17:51,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:51,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693365657] [2020-10-26 19:17:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:51,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:51,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:55,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:17:55,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:17:55,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3929 [2020-10-26 19:17:55,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:55,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:17:55,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:55,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:17:55,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:55,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:55,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:55,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:55,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:55,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:55,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:55,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693365657] [2020-10-26 19:17:55,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:55,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:17:55,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770156333] [2020-10-26 19:17:55,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:17:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:17:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:17:55,545 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 9 states. [2020-10-26 19:17:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:55,702 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-26 19:17:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:17:55,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-26 19:17:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:55,704 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:17:55,704 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:17:55,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:17:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:17:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-26 19:17:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:17:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-26 19:17:55,720 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 33 [2020-10-26 19:17:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:55,720 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-26 19:17:55,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:17:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-26 19:17:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:17:55,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:55,724 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:55,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:17:55,725 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash 117852306, now seen corresponding path program 6 times [2020-10-26 19:17:55,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:55,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995720096] [2020-10-26 19:17:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:55,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:55,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:00,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:18:00,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:00,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4847 [2020-10-26 19:18:00,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:18:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:00,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:18:00,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:00,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:00,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:00,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:00,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:00,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:00,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:00,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:00,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995720096] [2020-10-26 19:18:00,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:00,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:18:00,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466969437] [2020-10-26 19:18:00,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:18:00,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:00,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:18:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:18:00,720 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 10 states. [2020-10-26 19:18:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:00,870 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-26 19:18:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:18:00,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-26 19:18:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:00,872 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:18:00,872 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:18:00,873 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 19:18:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:18:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-26 19:18:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:18:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-26 19:18:00,879 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 35 [2020-10-26 19:18:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:00,879 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-26 19:18:00,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:18:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-26 19:18:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:18:00,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:00,880 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:00,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:18:00,881 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash -804152592, now seen corresponding path program 7 times [2020-10-26 19:18:00,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:00,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756950231] [2020-10-26 19:18:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:00,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:05,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:05,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:18:05,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:05,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:18:05,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:18:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:18:05,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:06,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:06,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:06,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:06,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:06,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:06,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:06,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:06,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756950231] [2020-10-26 19:18:06,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:06,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:18:06,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058244000] [2020-10-26 19:18:06,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:18:06,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:18:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:18:06,043 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 11 states. [2020-10-26 19:18:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:06,187 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-26 19:18:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:18:06,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-26 19:18:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:06,189 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:18:06,189 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:18:06,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:18:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:18:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-26 19:18:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:18:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-26 19:18:06,199 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 37 [2020-10-26 19:18:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:06,200 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-26 19:18:06,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:18:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-26 19:18:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:18:06,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:06,202 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:06,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:18:06,203 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2087596594, now seen corresponding path program 8 times [2020-10-26 19:18:06,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:06,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228547612] [2020-10-26 19:18:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:06,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:11,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:18:11,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:11,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:18:11,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:18:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:18:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:11,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:11,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:11,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:11,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:11,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:11,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:11,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228547612] [2020-10-26 19:18:11,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:11,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:18:11,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900276107] [2020-10-26 19:18:11,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:18:11,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:11,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:18:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:18:11,387 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 12 states. [2020-10-26 19:18:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:11,498 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-26 19:18:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:18:11,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-26 19:18:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:11,500 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:18:11,500 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:18:11,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 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 19:18:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:18:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-26 19:18:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:18:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-26 19:18:11,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 39 [2020-10-26 19:18:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:11,518 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-26 19:18:11,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:18:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-26 19:18:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:18:11,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:11,520 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:11,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:18:11,520 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1473298732, now seen corresponding path program 9 times [2020-10-26 19:18:11,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:11,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814990966] [2020-10-26 19:18:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:11,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:12,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:16,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:16,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:18:16,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:18:16,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:18:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:16,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:18:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:18:16,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:16,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:16,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:16,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:16,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:16,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:18:16,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:16,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:16,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:16,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:18:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:16,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814990966] [2020-10-26 19:18:16,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:16,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:18:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023365269] [2020-10-26 19:18:16,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:18:16,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:18:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:18:16,750 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 13 states. [2020-10-26 19:18:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:16,916 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-26 19:18:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:18:16,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-26 19:18:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:16,918 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:18:16,918 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:18:16,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:18:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:18:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-26 19:18:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:18:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-26 19:18:16,930 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 41 [2020-10-26 19:18:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:16,931 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-26 19:18:16,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:18:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-26 19:18:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:18:16,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:16,935 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:16,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:18:16,936 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 404772106, now seen corresponding path program 10 times [2020-10-26 19:18:16,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:16,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9610722] [2020-10-26 19:18:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:16,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:16,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:17,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:21,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:21,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:18:21,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:21,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:18:21,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:18:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:21,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:18:21,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:22,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:22,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:22,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:22,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:22,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:22,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:22,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:22,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9610722] [2020-10-26 19:18:22,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:22,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:18:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964258928] [2020-10-26 19:18:22,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:18:22,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:18:22,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:18:22,169 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 14 states. [2020-10-26 19:18:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:22,326 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-26 19:18:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:18:22,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-26 19:18:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:22,327 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:18:22,327 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:18:22,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:18:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:18:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-26 19:18:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:18:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-26 19:18:22,334 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 43 [2020-10-26 19:18:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:22,334 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-26 19:18:22,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:18:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-26 19:18:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:18:22,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:22,336 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:22,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:18:22,336 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash 47868264, now seen corresponding path program 11 times [2020-10-26 19:18:22,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:22,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337256781] [2020-10-26 19:18:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:22,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:27,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:18:27,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:27,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:18:27,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:18:27,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:27,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:18:27,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:27,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:27,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:27,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:27,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337256781] [2020-10-26 19:18:27,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:27,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:18:27,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764870798] [2020-10-26 19:18:27,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:18:27,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:18:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:18:27,563 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 15 states. [2020-10-26 19:18:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:27,781 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-26 19:18:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:18:27,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-26 19:18:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:27,782 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:18:27,782 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:18:27,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:18:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:18:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-26 19:18:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:18:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-26 19:18:27,795 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 45 [2020-10-26 19:18:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:27,795 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-26 19:18:27,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:18:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-26 19:18:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:18:27,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:27,798 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:27,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:18:27,799 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash 660659782, now seen corresponding path program 12 times [2020-10-26 19:18:27,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:27,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893416487] [2020-10-26 19:18:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:27,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:28,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:32,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:32,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:18:32,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:32,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:32,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:32,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:18:32,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:32,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:18:32,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:33,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:33,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:33,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:33,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:33,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:33,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:33,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:33,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:33,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893416487] [2020-10-26 19:18:33,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:33,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:18:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185850523] [2020-10-26 19:18:33,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:18:33,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:18:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:33,070 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 16 states. [2020-10-26 19:18:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:33,262 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-10-26 19:18:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:18:33,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-26 19:18:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:33,263 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:18:33,263 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:18:33,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:18:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-26 19:18:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:18:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-26 19:18:33,269 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 47 [2020-10-26 19:18:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:33,269 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-26 19:18:33,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:18:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-26 19:18:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:18:33,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:33,271 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:33,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:18:33,271 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1142789028, now seen corresponding path program 13 times [2020-10-26 19:18:33,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:33,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030206971] [2020-10-26 19:18:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:33,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:33,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:34,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:38,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:18:38,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:38,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:18:38,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:38,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:18:38,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:38,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:18:38,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:38,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:38,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:38,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:38,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:38,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030206971] [2020-10-26 19:18:38,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:38,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:18:38,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961449619] [2020-10-26 19:18:38,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:18:38,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:18:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:18:38,528 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 17 states. [2020-10-26 19:18:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:38,729 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-10-26 19:18:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:18:38,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-26 19:18:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:38,730 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:18:38,730 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:18:38,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:18:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:18:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-26 19:18:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:18:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-26 19:18:38,736 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 49 [2020-10-26 19:18:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:38,737 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-26 19:18:38,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:18:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-26 19:18:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:18:38,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:38,738 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:38,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:18:38,738 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash 612526466, now seen corresponding path program 14 times [2020-10-26 19:18:38,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:38,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981323563] [2020-10-26 19:18:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:38,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:38,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:43,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:43,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:18:43,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:18:43,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:18:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:18:43,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:44,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:44,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:44,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:44,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:44,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:44,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:18:44,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:44,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:44,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:44,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:44,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:44,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981323563] [2020-10-26 19:18:44,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:44,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:18:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558544692] [2020-10-26 19:18:44,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:18:44,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:44,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:18:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:18:44,079 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 18 states. [2020-10-26 19:18:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:44,365 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-26 19:18:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:18:44,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-26 19:18:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:44,367 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:18:44,367 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:18:44,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:18:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:18:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-26 19:18:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:18:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-26 19:18:44,381 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 51 [2020-10-26 19:18:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:44,383 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-26 19:18:44,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:18:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-26 19:18:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:18:44,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:44,385 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:44,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:18:44,386 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:44,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2131312608, now seen corresponding path program 15 times [2020-10-26 19:18:44,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:44,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441561253] [2020-10-26 19:18:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:44,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:44,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:44,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:44,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:45,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:49,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:18:49,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:49,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:18:49,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:49,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:18:49,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:49,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:18:49,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:49,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:49,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:49,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:49,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441561253] [2020-10-26 19:18:49,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:49,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:18:49,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829422041] [2020-10-26 19:18:49,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:18:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:49,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:18:49,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:18:49,703 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 19 states. [2020-10-26 19:18:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:49,893 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-10-26 19:18:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:18:49,893 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-26 19:18:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:49,894 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:18:49,894 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:18:49,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:18:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:18:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:18:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:18:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-26 19:18:49,900 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 53 [2020-10-26 19:18:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:49,900 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-26 19:18:49,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:18:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-26 19:18:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:18:49,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:49,901 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:49,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:18:49,901 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1395914430, now seen corresponding path program 16 times [2020-10-26 19:18:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:49,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215157686] [2020-10-26 19:18:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:49,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:49,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:50,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:54,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:54,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:18:54,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:18:54,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:18:54,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:54,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:18:54,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:54,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:18:54,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:55,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:55,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:55,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:55,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:55,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:55,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:55,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:55,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215157686] [2020-10-26 19:18:55,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:55,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:18:55,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232092190] [2020-10-26 19:18:55,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:18:55,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:55,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:18:55,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:18:55,259 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 20 states. [2020-10-26 19:18:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:55,494 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-26 19:18:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:18:55,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-10-26 19:18:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:55,495 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:18:55,495 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:18:55,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:18:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:18:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 19:18:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:18:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-26 19:18:55,501 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 55 [2020-10-26 19:18:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:55,501 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-26 19:18:55,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:18:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-26 19:18:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:18:55,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:55,502 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:55,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:18:55,503 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:55,503 INFO L82 PathProgramCache]: Analyzing trace with hash -947098084, now seen corresponding path program 17 times [2020-10-26 19:18:55,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:55,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328468778] [2020-10-26 19:18:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:55,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:19:00,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:00,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:00,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:00,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:00,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:00,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:00,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:00,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328468778] [2020-10-26 19:19:00,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:00,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:19:00,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920890769] [2020-10-26 19:19:00,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:19:00,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:19:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:00,891 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 21 states. [2020-10-26 19:19:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:01,129 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-26 19:19:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:19:01,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-26 19:19:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:01,132 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:19:01,132 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:19:01,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:19:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:19:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:19:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-26 19:19:01,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 57 [2020-10-26 19:19:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:01,139 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-26 19:19:01,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:19:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-26 19:19:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:19:01,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:01,143 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:01,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:19:01,143 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:01,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2019260934, now seen corresponding path program 18 times [2020-10-26 19:19:01,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:01,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97908849] [2020-10-26 19:19:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:01,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:01,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:06,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:19:06,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:06,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:19:06,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:06,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:19:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:06,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:19:06,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:06,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:06,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:19:06,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:06,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97908849] [2020-10-26 19:19:06,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:06,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:19:06,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466589946] [2020-10-26 19:19:06,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:19:06,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:19:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:06,572 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 22 states. [2020-10-26 19:19:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:06,848 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2020-10-26 19:19:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:19:06,849 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-26 19:19:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:06,850 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:19:06,850 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:19:06,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:19:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-26 19:19:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:19:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-10-26 19:19:06,860 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 59 [2020-10-26 19:19:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:06,860 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-10-26 19:19:06,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:19:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-10-26 19:19:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:19:06,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:06,861 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:06,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:19:06,861 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:06,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1575608744, now seen corresponding path program 19 times [2020-10-26 19:19:06,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:06,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604609638] [2020-10-26 19:19:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:06,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:09,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:19:11,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:12,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:12,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:12,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604609638] [2020-10-26 19:19:12,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:12,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:19:12,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104905861] [2020-10-26 19:19:12,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:19:12,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:19:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:12,332 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 23 states. [2020-10-26 19:19:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:12,546 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-26 19:19:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:19:12,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-10-26 19:19:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:12,548 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:19:12,548 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:19:12,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:19:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-26 19:19:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:19:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-26 19:19:12,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 61 [2020-10-26 19:19:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:12,555 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-26 19:19:12,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:19:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-26 19:19:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:19:12,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:12,556 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:12,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:19:12,557 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash -427616458, now seen corresponding path program 20 times [2020-10-26 19:19:12,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:12,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851825190] [2020-10-26 19:19:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:12,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:12,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:15,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:17,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:19:17,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:18,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:18,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:18,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:18,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:18,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:18,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:18,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851825190] [2020-10-26 19:19:18,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:18,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:19:18,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448354911] [2020-10-26 19:19:18,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:19:18,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:19:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:19:18,063 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 24 states. [2020-10-26 19:19:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:18,364 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-10-26 19:19:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:19:18,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-10-26 19:19:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:18,366 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:19:18,367 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:19:18,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:19:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:19:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:19:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:19:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-10-26 19:19:18,378 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 63 [2020-10-26 19:19:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:18,378 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-10-26 19:19:18,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:19:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-10-26 19:19:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:19:18,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:18,380 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:18,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:19:18,380 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:18,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1013624684, now seen corresponding path program 21 times [2020-10-26 19:19:18,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:18,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660855831] [2020-10-26 19:19:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:18,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:18,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:18,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:18,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:21,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:23,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:19:23,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:23,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 19:19:23,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:19:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:19:23,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:23,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:23,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:23,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:23,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:23,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:23,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:23,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:23,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:23,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660855831] [2020-10-26 19:19:23,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:23,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:19:23,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480898246] [2020-10-26 19:19:23,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:19:23,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:23,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:19:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:23,932 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 25 states. [2020-10-26 19:19:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:24,226 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-10-26 19:19:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:19:24,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-10-26 19:19:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:24,228 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:19:24,228 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:19:24,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:19:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-26 19:19:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:19:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-26 19:19:24,233 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 65 [2020-10-26 19:19:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:24,233 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-26 19:19:24,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:19:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-26 19:19:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:19:24,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:24,234 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:24,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:19:24,234 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1526814094, now seen corresponding path program 22 times [2020-10-26 19:19:24,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:24,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782553813] [2020-10-26 19:19:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:24,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:24,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:29,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:19:29,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:29,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:19:29,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:29,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:19:29,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:29,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:19:29,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:29,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:29,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:29,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:29,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:29,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:29,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:29,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:29,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:29,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:29,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:29,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782553813] [2020-10-26 19:19:29,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:29,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:19:29,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420608458] [2020-10-26 19:19:29,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:19:29,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:29,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:19:29,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:29,784 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 26 states. [2020-10-26 19:19:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:30,089 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-10-26 19:19:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:19:30,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-10-26 19:19:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:30,091 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:19:30,091 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:19:30,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:19:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-26 19:19:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:19:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-26 19:19:30,098 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 67 [2020-10-26 19:19:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:30,098 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-26 19:19:30,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:19:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-26 19:19:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:19:30,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:30,099 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:30,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:19:30,099 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash -780598064, now seen corresponding path program 23 times [2020-10-26 19:19:30,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:30,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229518047] [2020-10-26 19:19:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:30,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:30,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:30,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:19:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:35,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:35,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:35,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:35,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:35,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:35,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:35,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:35,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:35,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:35,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229518047] [2020-10-26 19:19:35,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:35,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:19:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849769497] [2020-10-26 19:19:35,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:19:35,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:19:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:19:35,717 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 27 states. [2020-10-26 19:19:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:36,038 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2020-10-26 19:19:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:19:36,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2020-10-26 19:19:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:36,039 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:19:36,039 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:19:36,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:19:36,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:19:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-26 19:19:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:19:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-26 19:19:36,047 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 69 [2020-10-26 19:19:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:36,048 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-26 19:19:36,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:19:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-26 19:19:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:19:36,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:36,050 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:36,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:19:36,050 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:36,050 INFO L82 PathProgramCache]: Analyzing trace with hash -926531666, now seen corresponding path program 24 times [2020-10-26 19:19:36,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:36,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148994809] [2020-10-26 19:19:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:36,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:36,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:38,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:39,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:41,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:19:41,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:41,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-26 19:19:41,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:19:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:41,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:19:41,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:41,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:41,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:41,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:41,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:41,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:41,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:41,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148994809] [2020-10-26 19:19:41,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:41,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:19:41,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920169593] [2020-10-26 19:19:41,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:19:41,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:41,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:19:41,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:19:41,694 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 28 states. [2020-10-26 19:19:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:41,913 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-26 19:19:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:19:41,913 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-10-26 19:19:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:41,915 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:19:41,915 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:19:41,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:19:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:19:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-26 19:19:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:19:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2020-10-26 19:19:41,921 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 71 [2020-10-26 19:19:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:41,922 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2020-10-26 19:19:41,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:19:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2020-10-26 19:19:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:19:41,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:41,923 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:41,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:19:41,923 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash 565197580, now seen corresponding path program 25 times [2020-10-26 19:19:41,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:41,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551990299] [2020-10-26 19:19:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:41,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:47,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:19:47,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:47,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-26 19:19:47,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:47,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:19:47,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:47,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:19:47,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:47,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:47,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:47,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:47,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:47,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:47,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:47,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:47,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:47,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551990299] [2020-10-26 19:19:47,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:47,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:19:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165840432] [2020-10-26 19:19:47,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:19:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:19:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:19:47,724 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 29 states. [2020-10-26 19:19:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:48,065 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-10-26 19:19:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:19:48,066 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 73 [2020-10-26 19:19:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:48,067 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:19:48,067 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:19:48,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:19:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:19:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 19:19:48,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:19:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-26 19:19:48,077 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 73 [2020-10-26 19:19:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:48,079 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-26 19:19:48,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:19:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-26 19:19:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:19:48,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:48,082 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:48,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:19:48,083 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash -402073878, now seen corresponding path program 26 times [2020-10-26 19:19:48,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:48,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745210280] [2020-10-26 19:19:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:48,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:53,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:19:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-26 19:19:53,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:53,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:19:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:19:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:53,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:53,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:53,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:53,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:53,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:53,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:53,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:53,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:53,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:53,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:53,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745210280] [2020-10-26 19:19:53,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:53,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:19:53,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131946974] [2020-10-26 19:19:53,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:19:53,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:19:53,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:19:53,827 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 30 states. [2020-10-26 19:19:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:54,141 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2020-10-26 19:19:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:19:54,142 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 75 [2020-10-26 19:19:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:54,143 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:19:54,143 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:19:54,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:19:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:19:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-26 19:19:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:19:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-10-26 19:19:54,149 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 75 [2020-10-26 19:19:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:54,150 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-10-26 19:19:54,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:19:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-10-26 19:19:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:19:54,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:54,151 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:54,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:19:54,151 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2057958216, now seen corresponding path program 27 times [2020-10-26 19:19:54,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:54,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121167764] [2020-10-26 19:19:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:59,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:59,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:19:59,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:19:59,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:19:59,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:59,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:19:59,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:59,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:19:59,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:59,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:59,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:59,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:59,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:59,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:59,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:19:59,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:59,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121167764] [2020-10-26 19:19:59,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:59,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:19:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941160856] [2020-10-26 19:19:59,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:19:59,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:59,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:19:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:19:59,850 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 31 states. [2020-10-26 19:20:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:00,185 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2020-10-26 19:20:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:20:00,185 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 77 [2020-10-26 19:20:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:00,186 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:20:00,186 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:20:00,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 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 19:20:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:20:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-26 19:20:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:20:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-10-26 19:20:00,192 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 77 [2020-10-26 19:20:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:00,193 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-10-26 19:20:00,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:20:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-10-26 19:20:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:20:00,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:00,194 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:00,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:20:00,194 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash -378179546, now seen corresponding path program 28 times [2020-10-26 19:20:00,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:00,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414277226] [2020-10-26 19:20:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:00,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:04,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:04,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:05,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:20:05,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:06,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:06,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:06,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:06,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:06,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:06,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:06,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:06,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:06,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:06,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:06,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414277226] [2020-10-26 19:20:06,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:06,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:20:06,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677330276] [2020-10-26 19:20:06,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:20:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:20:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:06,075 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 32 states. [2020-10-26 19:20:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:06,318 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-26 19:20:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:20:06,318 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 79 [2020-10-26 19:20:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:06,319 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:20:06,319 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:20:06,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:20:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-26 19:20:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:20:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-26 19:20:06,325 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 79 [2020-10-26 19:20:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:06,326 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-26 19:20:06,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:20:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-26 19:20:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:20:06,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:06,327 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:06,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:20:06,327 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash -749392508, now seen corresponding path program 29 times [2020-10-26 19:20:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:06,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420552582] [2020-10-26 19:20:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:11,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:20:11,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:20:11,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:20:11,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:20:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:20:11,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:12,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:12,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:12,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:12,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:20:12,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:12,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:12,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:12,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420552582] [2020-10-26 19:20:12,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:12,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:20:12,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373643459] [2020-10-26 19:20:12,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:20:12,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:20:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:12,133 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 33 states. [2020-10-26 19:20:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:12,499 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-10-26 19:20:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:20:12,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 81 [2020-10-26 19:20:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:12,501 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:20:12,501 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:20:12,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:20:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-26 19:20:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:20:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-26 19:20:12,510 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 81 [2020-10-26 19:20:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:12,510 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-26 19:20:12,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:20:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-26 19:20:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:20:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:12,513 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:12,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:20:12,514 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1002763422, now seen corresponding path program 30 times [2020-10-26 19:20:12,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:12,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061923742] [2020-10-26 19:20:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:12,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:12,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:17,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:17,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:20:17,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:17,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:20:17,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:17,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:20:17,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:17,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:20:17,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:18,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:18,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:18,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:18,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:18,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:18,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:18,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061923742] [2020-10-26 19:20:18,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:18,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:20:18,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263559567] [2020-10-26 19:20:18,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:20:18,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:20:18,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:20:18,362 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 34 states. [2020-10-26 19:20:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:18,759 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2020-10-26 19:20:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:20:18,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 83 [2020-10-26 19:20:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:18,761 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:20:18,765 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:20:18,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 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 19:20:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:20:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-26 19:20:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:20:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2020-10-26 19:20:18,772 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 83 [2020-10-26 19:20:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:18,772 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2020-10-26 19:20:18,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:20:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2020-10-26 19:20:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:20:18,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:18,773 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:18,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:20:18,773 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash 320924096, now seen corresponding path program 31 times [2020-10-26 19:20:18,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:18,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509280251] [2020-10-26 19:20:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:18,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:23,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:23,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:20:23,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:23,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:20:23,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:20:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:20:23,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:24,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:24,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:24,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509280251] [2020-10-26 19:20:24,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:24,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:20:24,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274315587] [2020-10-26 19:20:24,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:20:24,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:24,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:20:24,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:24,713 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand 35 states. [2020-10-26 19:20:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:25,025 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2020-10-26 19:20:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:20:25,026 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 85 [2020-10-26 19:20:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:25,027 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:20:25,027 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:20:25,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:20:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-26 19:20:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:20:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-26 19:20:25,034 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 85 [2020-10-26 19:20:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:25,034 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-26 19:20:25,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:20:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-26 19:20:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:20:25,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:25,036 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:25,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:20:25,036 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:25,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1074309278, now seen corresponding path program 32 times [2020-10-26 19:20:25,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:25,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933139605] [2020-10-26 19:20:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:25,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:25,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:30,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:20:30,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:30,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:30,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:30,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:30,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:30,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:30,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:30,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:30,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:30,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:30,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:30,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933139605] [2020-10-26 19:20:30,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:30,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:20:30,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993506748] [2020-10-26 19:20:30,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:20:30,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:30,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:20:30,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:20:30,994 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 36 states. [2020-10-26 19:20:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:31,413 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-26 19:20:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:20:31,414 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2020-10-26 19:20:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:31,415 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:20:31,415 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:20:31,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 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 19:20:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:20:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-26 19:20:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:20:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2020-10-26 19:20:31,422 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 87 [2020-10-26 19:20:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:31,422 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2020-10-26 19:20:31,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:20:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2020-10-26 19:20:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:20:31,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:31,424 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:31,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:20:31,424 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash -772003844, now seen corresponding path program 33 times [2020-10-26 19:20:31,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:31,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372328013] [2020-10-26 19:20:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:36,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:36,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:20:36,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:20:36,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 19:20:36,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:36,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:20:36,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:20:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:37,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:37,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:37,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:37,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:37,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:37,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:37,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:37,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:37,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:37,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372328013] [2020-10-26 19:20:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:37,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:20:37,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760945367] [2020-10-26 19:20:37,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:20:37,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:20:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:20:37,464 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 37 states. [2020-10-26 19:20:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:37,888 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2020-10-26 19:20:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:20:37,889 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 89 [2020-10-26 19:20:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:37,890 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:20:37,890 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:20:37,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:20:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:20:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-26 19:20:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:20:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-10-26 19:20:37,896 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 89 [2020-10-26 19:20:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:37,897 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-10-26 19:20:37,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:20:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-10-26 19:20:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:20:37,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:37,898 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:37,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:20:37,898 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1257420838, now seen corresponding path program 34 times [2020-10-26 19:20:37,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:37,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487837035] [2020-10-26 19:20:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:37,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:37,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:42,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:42,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:20:42,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:20:42,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:20:42,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:20:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:20:42,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:43,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:43,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:44,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487837035] [2020-10-26 19:20:44,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:44,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:20:44,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478433714] [2020-10-26 19:20:44,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:20:44,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:44,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:20:44,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:20:44,004 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 38 states. [2020-10-26 19:20:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:44,359 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2020-10-26 19:20:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:20:44,359 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2020-10-26 19:20:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:44,361 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:20:44,361 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:20:44,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 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 19:20:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:20:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-26 19:20:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:20:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-26 19:20:44,367 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 91 [2020-10-26 19:20:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:44,368 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-26 19:20:44,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:20:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-26 19:20:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:20:44,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:44,369 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:44,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:20:44,369 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash 408283192, now seen corresponding path program 35 times [2020-10-26 19:20:44,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:44,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572133357] [2020-10-26 19:20:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:44,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:49,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:20:49,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:50,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:50,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572133357] [2020-10-26 19:20:50,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:50,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:20:50,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195798510] [2020-10-26 19:20:50,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:20:50,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:50,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:20:50,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:20:50,498 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 39 states. [2020-10-26 19:20:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:50,829 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2020-10-26 19:20:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:20:50,830 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 93 [2020-10-26 19:20:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:50,831 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:20:50,831 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:20:50,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:20:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:20:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-26 19:20:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:20:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2020-10-26 19:20:50,839 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 93 [2020-10-26 19:20:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:50,839 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2020-10-26 19:20:50,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:20:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2020-10-26 19:20:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:20:50,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:50,840 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:50,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:20:50,841 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash -872945386, now seen corresponding path program 36 times [2020-10-26 19:20:50,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:50,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758652900] [2020-10-26 19:20:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:50,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:51,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:51,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:51,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:55,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:55,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:20:55,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:20:55,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:20:55,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:20:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:20:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:57,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:57,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:57,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:57,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:57,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:57,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:57,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:57,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758652900] [2020-10-26 19:20:57,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:57,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:20:57,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360881139] [2020-10-26 19:20:57,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:20:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:20:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:20:57,050 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 40 states. [2020-10-26 19:20:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:57,399 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2020-10-26 19:20:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:20:57,399 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 95 [2020-10-26 19:20:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:57,401 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:20:57,401 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:20:57,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:20:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:20:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-26 19:20:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:20:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-10-26 19:20:57,406 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 95 [2020-10-26 19:20:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:57,406 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-10-26 19:20:57,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:20:57,407 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-10-26 19:20:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:20:57,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:57,408 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:57,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:20:57,408 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 522005108, now seen corresponding path program 37 times [2020-10-26 19:20:57,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:57,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332556868] [2020-10-26 19:20:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:57,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:57,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:57,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:58,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:02,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:02,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:21:02,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:21:02,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-26 19:21:02,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:21:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:02,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:21:02,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:03,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:03,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:03,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:03,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:03,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:03,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:03,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:03,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:03,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:03,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332556868] [2020-10-26 19:21:03,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:03,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:21:03,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437577703] [2020-10-26 19:21:03,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:21:03,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:21:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:21:03,785 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 41 states. [2020-10-26 19:21:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:04,180 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2020-10-26 19:21:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:21:04,181 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 97 [2020-10-26 19:21:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:04,182 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:21:04,182 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:21:04,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:21:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:21:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-26 19:21:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:21:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-26 19:21:04,188 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 97 [2020-10-26 19:21:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:04,188 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-26 19:21:04,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:21:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-26 19:21:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:21:04,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:04,189 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:04,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:21:04,189 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:04,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1039633490, now seen corresponding path program 38 times [2020-10-26 19:21:04,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:04,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627104341] [2020-10-26 19:21:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:04,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:04,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:04,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:04,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:09,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:09,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:21:09,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:21:09,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-26 19:21:09,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:21:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:09,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:21:09,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:10,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:10,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:10,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:10,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:10,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:10,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:10,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:10,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627104341] [2020-10-26 19:21:10,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:10,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:21:10,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438241053] [2020-10-26 19:21:10,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:21:10,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:21:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:21:10,537 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 42 states. [2020-10-26 19:21:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:11,020 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-26 19:21:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:21:11,021 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 99 [2020-10-26 19:21:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:11,022 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:21:11,023 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:21:11,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:21:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:21:11,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-26 19:21:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:21:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-26 19:21:11,029 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 99 [2020-10-26 19:21:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:11,029 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-26 19:21:11,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:21:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-26 19:21:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:21:11,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:11,030 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:11,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:21:11,030 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash 264302256, now seen corresponding path program 39 times [2020-10-26 19:21:11,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:11,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447829511] [2020-10-26 19:21:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:11,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:11,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:21:16,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:17,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:17,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:17,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447829511] [2020-10-26 19:21:17,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:17,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:21:17,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808422572] [2020-10-26 19:21:17,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:21:17,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:17,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:21:17,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:21:17,458 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 43 states. [2020-10-26 19:21:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:17,737 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2020-10-26 19:21:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:21:17,738 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 101 [2020-10-26 19:21:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:17,739 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:21:17,739 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:21:17,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:21:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:21:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-26 19:21:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:21:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2020-10-26 19:21:17,746 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 101 [2020-10-26 19:21:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:17,746 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2020-10-26 19:21:17,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:21:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2020-10-26 19:21:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:21:17,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:17,747 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 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 19:21:17,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:21:17,748 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:17,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1799671410, now seen corresponding path program 40 times [2020-10-26 19:21:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880891967] [2020-10-26 19:21:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:17,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:22,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:21:22,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:24,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:24,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:24,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:24,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:24,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:24,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:24,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:24,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:24,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:24,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:24,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880891967] [2020-10-26 19:21:24,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:24,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:21:24,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949590656] [2020-10-26 19:21:24,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:21:24,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:24,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:21:24,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:21:24,258 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 44 states. [2020-10-26 19:21:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:24,705 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-26 19:21:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:21:24,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2020-10-26 19:21:24,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:24,706 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:21:24,706 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:21:24,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:21:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:21:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-26 19:21:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:21:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-10-26 19:21:24,712 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 103 [2020-10-26 19:21:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:24,713 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-10-26 19:21:24,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:21:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-10-26 19:21:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:21:24,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:24,714 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 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 19:21:24,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:21:24,714 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1003473684, now seen corresponding path program 41 times [2020-10-26 19:21:24,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:24,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349156956] [2020-10-26 19:21:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:24,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:25,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking...