/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:02:32,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:02:32,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:02:32,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:02:32,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:02:32,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:02:32,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:02:32,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:02:32,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:02:32,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:02:32,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:02:32,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:02:32,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:02:32,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:02:32,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:02:32,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:02:32,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:02:32,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:02:32,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:02:32,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:02:32,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:02:32,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:02:32,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:02:32,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:02:32,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:02:32,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:02:32,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:02:32,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:02:32,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:02:32,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:02:32,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:02:32,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:02:32,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:02:32,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:02:32,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:02:32,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:02:32,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:02:32,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:02:32,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:02:32,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:02:32,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:02:32,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:02:32,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:02:32,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:02:32,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:02:32,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:02:32,864 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:02:32,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:02:32,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:02:32,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:02:32,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:02:32,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:02:32,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:02:32,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:02:32,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:02:32,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:02:32,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:02:32,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:02:32,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:02:32,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:02:32,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:02:32,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:02:32,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:02:32,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:32,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:02:32,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:02:32,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:02:32,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:02:32,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:02:32,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:02:32,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:02:32,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:02:33,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:02:33,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:02:33,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:02:33,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:02:33,302 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:02:33,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2020-10-28 09:02:33,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/969e92ecd/5c6b805d9f124bd6903ee4e983080b5a/FLAG67bd7c52f [2020-10-28 09:02:34,091 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:02:34,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2020-10-28 09:02:34,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/969e92ecd/5c6b805d9f124bd6903ee4e983080b5a/FLAG67bd7c52f [2020-10-28 09:02:34,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/969e92ecd/5c6b805d9f124bd6903ee4e983080b5a [2020-10-28 09:02:34,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:02:34,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:02:34,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:34,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:02:34,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:02:34,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ea4a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34, skipping insertion in model container [2020-10-28 09:02:34,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:02:34,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:02:34,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:34,716 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:02:34,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:34,758 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:02:34,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34 WrapperNode [2020-10-28 09:02:34,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:34,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:02:34,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:02:34,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:02:34,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... [2020-10-28 09:02:34,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:02:34,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:02:34,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:02:34,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:02:34,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:34,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:02:34,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:02:34,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:02:34,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:02:34,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:02:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:02:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:02:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:02:35,332 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:02:35,332 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-28 09:02:35,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:35 BoogieIcfgContainer [2020-10-28 09:02:35,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:02:35,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:02:35,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:02:35,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:02:35,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:02:34" (1/3) ... [2020-10-28 09:02:35,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5990de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:35, skipping insertion in model container [2020-10-28 09:02:35,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:34" (2/3) ... [2020-10-28 09:02:35,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a5990de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:35, skipping insertion in model container [2020-10-28 09:02:35,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:35" (3/3) ... [2020-10-28 09:02:35,344 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-1.i [2020-10-28 09:02:35,357 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:02:35,361 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:02:35,375 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:02:35,404 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:02:35,404 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:02:35,404 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:02:35,404 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:02:35,404 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:02:35,405 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:02:35,405 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:02:35,405 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:02:35,423 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 09:02:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:02:35,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:35,431 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, 1, 1] [2020-10-28 09:02:35,431 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1254713614, now seen corresponding path program 1 times [2020-10-28 09:02:35,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:35,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19964545] [2020-10-28 09:02:35,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:35,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:37,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:02:37,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:37,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-10-28 09:02:37,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:37,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:37,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:37,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:02:37,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:37,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:02:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:37,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:37,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:37,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:37,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:02:37,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:37,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:37,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:37,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:37,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:37,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:37,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19964545] [2020-10-28 09:02:37,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:37,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:02:37,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409755776] [2020-10-28 09:02:37,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:02:37,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:02:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:02:37,505 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-28 09:02:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:37,719 INFO L93 Difference]: Finished difference Result 70 states and 104 transitions. [2020-10-28 09:02:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:02:37,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-28 09:02:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:37,732 INFO L225 Difference]: With dead ends: 70 [2020-10-28 09:02:37,732 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 09:02:37,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:02:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 09:02:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 09:02:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:02:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-28 09:02:37,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2020-10-28 09:02:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:37,804 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-28 09:02:37,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:02:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-28 09:02:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:02:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:37,807 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, 1, 1] [2020-10-28 09:02:37,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:02:37,807 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1022482938, now seen corresponding path program 1 times [2020-10-28 09:02:37,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:37,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582578887] [2020-10-28 09:02:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:37,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:37,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:40,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:02:40,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:40,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2648 [2020-10-28 09:02:40,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:40,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:02:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:02:40,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:02:40,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:40,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:40,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:40,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:40,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:02:40,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:40,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:40,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:40,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:40,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582578887] [2020-10-28 09:02:40,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:40,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:02:40,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752604038] [2020-10-28 09:02:40,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:02:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:40,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:02:40,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:40,639 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 4 states. [2020-10-28 09:02:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:40,895 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-10-28 09:02:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:02:40,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 09:02:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:40,898 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:02:40,898 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:02:40,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:02:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 09:02:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:02:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-28 09:02:40,925 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2020-10-28 09:02:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:40,925 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-28 09:02:40,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:02:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-28 09:02:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:02:40,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:40,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:40,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:02:40,930 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:40,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2123827569, now seen corresponding path program 1 times [2020-10-28 09:02:40,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:40,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407863814] [2020-10-28 09:02:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:45,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:45,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 09:02:45,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:45,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:02:45,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:45,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:02:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 09:02:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:02:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:46,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:46,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:46,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:46,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:46,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:46,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:46,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:46,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:02:46,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407863814] [2020-10-28 09:02:46,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:46,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:02:46,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241629489] [2020-10-28 09:02:46,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:02:46,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:46,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:02:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:46,069 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2020-10-28 09:02:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:46,416 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-28 09:02:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:02:46,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-28 09:02:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:46,419 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:02:46,419 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 09:02:46,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 09:02:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 09:02:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:02:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-28 09:02:46,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-10-28 09:02:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:46,444 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-28 09:02:46,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:02:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-28 09:02:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:02:46,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:46,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-28 09:02:46,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:02:46,452 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1509369946, now seen corresponding path program 2 times [2020-10-28 09:02:46,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:46,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263117811] [2020-10-28 09:02:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:02:51,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:51,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:02:51,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:02:51,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:02:51,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:02:51,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:02:51,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:51,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:51,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:02:51,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:51,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:51,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:51,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 09:02:51,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263117811] [2020-10-28 09:02:51,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:51,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:02:51,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297932078] [2020-10-28 09:02:51,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:02:51,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:02:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:51,626 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-10-28 09:02:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:51,918 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-28 09:02:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:02:51,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-28 09:02:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:51,920 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:02:51,920 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 09:02:51,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 09:02:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 09:02:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 09:02:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-28 09:02:51,938 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 41 [2020-10-28 09:02:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:51,938 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-28 09:02:51,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:02:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-28 09:02:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:02:51,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:51,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-10-28 09:02:51,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:02:51,946 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2004918481, now seen corresponding path program 3 times [2020-10-28 09:02:51,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:51,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520377508] [2020-10-28 09:02:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:56,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:56,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 09:02:56,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:56,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:02:56,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:56,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:56,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:02:56,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:02:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:02:56,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:57,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:57,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:57,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:57,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:57,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:02:57,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:57,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:57,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:57,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:57,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:57,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:02:57,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520377508] [2020-10-28 09:02:57,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:57,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:02:57,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404394634] [2020-10-28 09:02:57,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:02:57,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:57,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:02:57,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:57,109 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 7 states. [2020-10-28 09:02:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:57,411 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-28 09:02:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:02:57,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-10-28 09:02:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:57,413 INFO L225 Difference]: With dead ends: 103 [2020-10-28 09:02:57,413 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:02:57,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:02:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 09:02:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:02:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-28 09:02:57,435 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 48 [2020-10-28 09:02:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:57,436 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-28 09:02:57,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:02:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-28 09:02:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:02:57,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:57,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2020-10-28 09:02:57,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:02:57,440 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1774816954, now seen corresponding path program 4 times [2020-10-28 09:02:57,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:57,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635161981] [2020-10-28 09:02:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:57,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:03:02,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:02,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:03:02,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:03:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:03:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:03:02,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:02,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:02,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:02,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:02,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 09:03:02,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635161981] [2020-10-28 09:03:02,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:02,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:03:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918901769] [2020-10-28 09:03:02,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:03:02,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:03:02,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:02,624 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 8 states. [2020-10-28 09:03:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:02,927 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-28 09:03:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:03:02,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 09:03:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:02,931 INFO L225 Difference]: With dead ends: 116 [2020-10-28 09:03:02,931 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:03:02,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:03:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 09:03:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:03:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-28 09:03:02,949 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 55 [2020-10-28 09:03:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:02,950 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-28 09:03:02,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:03:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-28 09:03:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 09:03:02,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:02,954 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 1, 1, 1, 1] [2020-10-28 09:03:02,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:03:02,954 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1332096975, now seen corresponding path program 5 times [2020-10-28 09:03:02,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:02,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040193472] [2020-10-28 09:03:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:02,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:07,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:07,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 09:03:07,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:07,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:03:07,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:07,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:03:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:03:07,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:08,258 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-28 09:03:08,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:08,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:08,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:03:08,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:08,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:08,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:03:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 09:03:08,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040193472] [2020-10-28 09:03:08,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:08,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:03:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534001165] [2020-10-28 09:03:08,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:03:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:03:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:08,295 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-10-28 09:03:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:08,518 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2020-10-28 09:03:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:03:08,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-28 09:03:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:08,522 INFO L225 Difference]: With dead ends: 129 [2020-10-28 09:03:08,522 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:03:08,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:03:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-28 09:03:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:03:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-28 09:03:08,534 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 62 [2020-10-28 09:03:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:08,535 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-28 09:03:08,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:03:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-28 09:03:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:03:08,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:08,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 1, 1, 1, 1] [2020-10-28 09:03:08,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:03:08,537 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1930890522, now seen corresponding path program 6 times [2020-10-28 09:03:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:08,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320916322] [2020-10-28 09:03:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:08,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:13,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 09:03:13,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:13,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:13,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:13,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:03:13,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:13,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:03:13,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:13,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:13,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:13,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:13,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:13,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:03:13,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:13,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:13,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:13,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:13,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:13,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 09:03:13,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320916322] [2020-10-28 09:03:13,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:13,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:03:13,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825003218] [2020-10-28 09:03:13,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:03:13,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:03:13,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:13,710 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 10 states. [2020-10-28 09:03:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:13,958 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-28 09:03:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:03:13,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-28 09:03:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:13,961 INFO L225 Difference]: With dead ends: 142 [2020-10-28 09:03:13,961 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:03:13,964 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 [2020-10-28 09:03:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:03:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 09:03:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:03:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-28 09:03:13,982 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 69 [2020-10-28 09:03:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:13,982 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-28 09:03:13,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:03:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-28 09:03:13,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:03:13,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:13,988 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 1, 1, 1, 1] [2020-10-28 09:03:13,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:03:13,988 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash -154101871, now seen corresponding path program 7 times [2020-10-28 09:03:13,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:13,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448450402] [2020-10-28 09:03:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:14,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:19,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:03:19,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:03:19,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:19,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:03:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:03:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:03:19,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:19,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:19,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:19,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:19,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:19,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:19,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:19,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:19,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:19,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:19,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-28 09:03:19,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448450402] [2020-10-28 09:03:19,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:19,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:03:19,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286421532] [2020-10-28 09:03:19,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:03:19,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:19,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:03:19,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:19,174 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 11 states. [2020-10-28 09:03:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:19,389 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-28 09:03:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:03:19,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-28 09:03:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:19,390 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:03:19,390 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:03:19,391 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 [2020-10-28 09:03:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:03:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-28 09:03:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:03:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-28 09:03:19,413 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 76 [2020-10-28 09:03:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:19,414 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-28 09:03:19,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:03:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-28 09:03:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:03:19,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:19,418 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 1, 1, 1, 1] [2020-10-28 09:03:19,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:03:19,419 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:19,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:19,420 INFO L82 PathProgramCache]: Analyzing trace with hash -705536890, now seen corresponding path program 8 times [2020-10-28 09:03:19,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:19,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242758942] [2020-10-28 09:03:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:24,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:03:24,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:03:24,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:24,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:03:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:03:24,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:03:24,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:24,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:24,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:24,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:24,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:24,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:24,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:24,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:24,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-28 09:03:24,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242758942] [2020-10-28 09:03:24,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:24,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:03:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389024291] [2020-10-28 09:03:24,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:03:24,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:24,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:03:24,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:24,597 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 12 states. [2020-10-28 09:03:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:24,872 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2020-10-28 09:03:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:03:24,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-28 09:03:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:24,874 INFO L225 Difference]: With dead ends: 168 [2020-10-28 09:03:24,874 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:03:24,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:03:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-28 09:03:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 09:03:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-10-28 09:03:24,896 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 83 [2020-10-28 09:03:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:24,896 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-10-28 09:03:24,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:03:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-10-28 09:03:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:03:24,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:24,904 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 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, 1, 1, 1, 1] [2020-10-28 09:03:24,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:03:24,909 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1418917617, now seen corresponding path program 9 times [2020-10-28 09:03:24,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:24,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093212159] [2020-10-28 09:03:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:25,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:25,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:25,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:25,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 09:03:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:03:29,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:30,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:30,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:30,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:30,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:30,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:30,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:30,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:30,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:30,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-28 09:03:30,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093212159] [2020-10-28 09:03:30,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:30,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:03:30,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059735203] [2020-10-28 09:03:30,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:03:30,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:30,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:03:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:30,117 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 13 states. [2020-10-28 09:03:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:30,442 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2020-10-28 09:03:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:03:30,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-28 09:03:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:30,445 INFO L225 Difference]: With dead ends: 181 [2020-10-28 09:03:30,445 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:03:30,446 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 [2020-10-28 09:03:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:03:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 09:03:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:03:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-28 09:03:30,474 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 90 [2020-10-28 09:03:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:30,474 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-28 09:03:30,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:03:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-28 09:03:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:03:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:30,476 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1] [2020-10-28 09:03:30,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:03:30,476 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash 799321638, now seen corresponding path program 10 times [2020-10-28 09:03:30,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:30,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542986946] [2020-10-28 09:03:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:30,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:30,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:35,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:03:35,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:35,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:03:35,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:35,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:35,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:03:35,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:35,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:03:35,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:35,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:35,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:35,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:35,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:35,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:35,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:35,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 09:03:35,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542986946] [2020-10-28 09:03:35,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:35,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:03:35,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683439749] [2020-10-28 09:03:35,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:03:35,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:35,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:03:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:35,700 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 14 states. [2020-10-28 09:03:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:35,983 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2020-10-28 09:03:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:03:35,983 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-28 09:03:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:35,984 INFO L225 Difference]: With dead ends: 194 [2020-10-28 09:03:35,984 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 09:03:35,985 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 [2020-10-28 09:03:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 09:03:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-28 09:03:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 09:03:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-28 09:03:36,000 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 97 [2020-10-28 09:03:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:36,001 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-28 09:03:36,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:03:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-28 09:03:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:03:36,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:36,003 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 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, 1, 1, 1, 1] [2020-10-28 09:03:36,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:03:36,003 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash -238096815, now seen corresponding path program 11 times [2020-10-28 09:03:36,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:36,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14547477] [2020-10-28 09:03:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:36,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:36,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:36,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:36,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:36,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:41,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:03:41,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:41,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:03:41,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:41,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:03:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 09:03:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:03:41,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:41,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:41,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:41,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:41,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:41,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:41,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:41,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:41,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:41,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:41,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-10-28 09:03:41,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14547477] [2020-10-28 09:03:41,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:41,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:03:41,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108918761] [2020-10-28 09:03:41,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:03:41,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:03:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:03:41,239 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 15 states. [2020-10-28 09:03:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:41,538 INFO L93 Difference]: Finished difference Result 207 states and 227 transitions. [2020-10-28 09:03:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:03:41,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-28 09:03:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:41,540 INFO L225 Difference]: With dead ends: 207 [2020-10-28 09:03:41,540 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:03:41,540 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 [2020-10-28 09:03:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:03:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-28 09:03:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 09:03:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-10-28 09:03:41,549 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 104 [2020-10-28 09:03:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:41,552 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-10-28 09:03:41,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:03:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-10-28 09:03:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 09:03:41,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:41,554 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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, 1, 1, 1, 1] [2020-10-28 09:03:41,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:03:41,555 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash -355342394, now seen corresponding path program 12 times [2020-10-28 09:03:41,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:41,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441838947] [2020-10-28 09:03:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:41,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:46,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 09:03:46,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:03:46,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:46,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:46,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:46,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:46,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:46,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:46,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:46,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:46,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:46,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:46,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2020-10-28 09:03:46,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441838947] [2020-10-28 09:03:46,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:46,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:03:46,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536500149] [2020-10-28 09:03:46,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:03:46,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:46,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:03:46,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:46,788 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 16 states. [2020-10-28 09:03:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:47,057 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2020-10-28 09:03:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:03:47,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-28 09:03:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:47,058 INFO L225 Difference]: With dead ends: 220 [2020-10-28 09:03:47,058 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:03:47,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:03:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-28 09:03:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 09:03:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2020-10-28 09:03:47,065 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 111 [2020-10-28 09:03:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:47,065 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2020-10-28 09:03:47,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:03:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2020-10-28 09:03:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 09:03:47,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:47,066 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 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, 1, 1, 1, 1] [2020-10-28 09:03:47,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:03:47,067 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash -202211919, now seen corresponding path program 13 times [2020-10-28 09:03:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:47,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656018532] [2020-10-28 09:03:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:03:52,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:52,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:52,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:52,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:52,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:52,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:52,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-28 09:03:52,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656018532] [2020-10-28 09:03:52,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:52,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:03:52,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175800976] [2020-10-28 09:03:52,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:03:52,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:52,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:03:52,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:03:52,322 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 17 states. [2020-10-28 09:03:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:52,650 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-10-28 09:03:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:03:52,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-28 09:03:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:52,652 INFO L225 Difference]: With dead ends: 233 [2020-10-28 09:03:52,652 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 09:03:52,653 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 [2020-10-28 09:03:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 09:03:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-28 09:03:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 09:03:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2020-10-28 09:03:52,662 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 118 [2020-10-28 09:03:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:52,662 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2020-10-28 09:03:52,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:03:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2020-10-28 09:03:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:03:52,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:52,664 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 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, 1, 1, 1, 1] [2020-10-28 09:03:52,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:03:52,664 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash 181143910, now seen corresponding path program 14 times [2020-10-28 09:03:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:52,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104300144] [2020-10-28 09:03:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:52,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:53,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:57,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:57,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 09:03:57,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:57,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:57,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:57,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:57,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:03:57,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:03:57,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:03:57,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:57,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:57,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:57,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:57,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:57,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:57,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:03:57,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:57,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:57,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:57,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-28 09:03:57,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104300144] [2020-10-28 09:03:57,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:57,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:03:57,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584510785] [2020-10-28 09:03:57,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:03:57,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:57,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:03:57,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:57,954 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand 18 states. [2020-10-28 09:03:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:58,292 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2020-10-28 09:03:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:03:58,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2020-10-28 09:03:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:58,293 INFO L225 Difference]: With dead ends: 246 [2020-10-28 09:03:58,293 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 09:03:58,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 09:03:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-28 09:03:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 09:03:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2020-10-28 09:03:58,304 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 125 [2020-10-28 09:03:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:58,304 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2020-10-28 09:03:58,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:03:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2020-10-28 09:03:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 09:03:58,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:58,306 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 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, 1, 1, 1, 1] [2020-10-28 09:03:58,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:03:58,306 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:58,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1575724305, now seen corresponding path program 15 times [2020-10-28 09:03:58,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:58,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890950345] [2020-10-28 09:03:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:58,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:03,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:03,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 09:04:03,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:03,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:04:03,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:03,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:04:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-28 09:04:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:04:03,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:03,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:03,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:03,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:03,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:03,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:03,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:04:03,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:03,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:03,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:03,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-28 09:04:03,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890950345] [2020-10-28 09:04:03,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:03,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:04:03,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23012649] [2020-10-28 09:04:03,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:04:03,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:04:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:03,617 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 19 states. [2020-10-28 09:04:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:03,983 INFO L93 Difference]: Finished difference Result 259 states and 279 transitions. [2020-10-28 09:04:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:04:03,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 132 [2020-10-28 09:04:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:03,986 INFO L225 Difference]: With dead ends: 259 [2020-10-28 09:04:03,986 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:04:03,987 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 [2020-10-28 09:04:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:04:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-28 09:04:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:04:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-28 09:04:03,995 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 132 [2020-10-28 09:04:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:03,995 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-28 09:04:03,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:04:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-28 09:04:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 09:04:03,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:03,997 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 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, 1, 1, 1, 1] [2020-10-28 09:04:03,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:04:03,997 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1701122822, now seen corresponding path program 16 times [2020-10-28 09:04:03,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:03,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866672330] [2020-10-28 09:04:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:04,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:04,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:04,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:04,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:04,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:09,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:09,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 09:04:09,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:09,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:04:09,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:09,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:04:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 09:04:09,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:04:09,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:09,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:09,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:09,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:09,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:09,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:09,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:09,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:09,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-28 09:04:09,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866672330] [2020-10-28 09:04:09,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:09,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:04:09,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534280446] [2020-10-28 09:04:09,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:04:09,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:09,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:04:09,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:09,312 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 20 states. [2020-10-28 09:04:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:09,725 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2020-10-28 09:04:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:04:09,725 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 139 [2020-10-28 09:04:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:09,727 INFO L225 Difference]: With dead ends: 272 [2020-10-28 09:04:09,727 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 09:04:09,728 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 [2020-10-28 09:04:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 09:04:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-28 09:04:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-28 09:04:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2020-10-28 09:04:09,736 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 139 [2020-10-28 09:04:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:09,736 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2020-10-28 09:04:09,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:04:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2020-10-28 09:04:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 09:04:09,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:09,738 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 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, 1, 1, 1, 1] [2020-10-28 09:04:09,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:04:09,739 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:09,739 INFO L82 PathProgramCache]: Analyzing trace with hash -265788303, now seen corresponding path program 17 times [2020-10-28 09:04:09,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:09,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225423926] [2020-10-28 09:04:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:09,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:09,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:10,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:14,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:14,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-28 09:04:14,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:14,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:04:14,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:14,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:14,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:04:14,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 09:04:14,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:04:14,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:15,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:15,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:15,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:15,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:15,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:15,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:15,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:15,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2020-10-28 09:04:15,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225423926] [2020-10-28 09:04:15,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:15,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:04:15,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470719328] [2020-10-28 09:04:15,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:04:15,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:04:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:15,094 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand 21 states. [2020-10-28 09:04:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:15,511 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2020-10-28 09:04:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:04:15,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-28 09:04:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:15,513 INFO L225 Difference]: With dead ends: 285 [2020-10-28 09:04:15,513 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 09:04:15,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 09:04:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-28 09:04:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 09:04:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2020-10-28 09:04:15,528 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 146 [2020-10-28 09:04:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:15,528 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2020-10-28 09:04:15,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:04:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2020-10-28 09:04:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 09:04:15,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:15,529 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 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, 1, 1, 1, 1] [2020-10-28 09:04:15,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:04:15,530 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1024523098, now seen corresponding path program 18 times [2020-10-28 09:04:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:15,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735796968] [2020-10-28 09:04:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:20,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:20,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 09:04:20,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:20,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:04:20,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:20,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:04:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 09:04:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:04:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:20,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:20,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:20,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:20,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:20,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:20,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:20,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:20,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:20,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:20,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:20,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-28 09:04:20,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735796968] [2020-10-28 09:04:20,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:20,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:04:20,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018134931] [2020-10-28 09:04:20,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:04:20,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:20,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:04:20,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:20,909 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand 22 states. [2020-10-28 09:04:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:21,356 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2020-10-28 09:04:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:04:21,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 153 [2020-10-28 09:04:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:21,358 INFO L225 Difference]: With dead ends: 298 [2020-10-28 09:04:21,358 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 09:04:21,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 09:04:21,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-28 09:04:21,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-28 09:04:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2020-10-28 09:04:21,369 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 153 [2020-10-28 09:04:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:21,369 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2020-10-28 09:04:21,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:04:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2020-10-28 09:04:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-28 09:04:21,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:21,371 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 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, 1, 1, 1, 1] [2020-10-28 09:04:21,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:04:21,371 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 144096209, now seen corresponding path program 19 times [2020-10-28 09:04:21,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:21,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769694318] [2020-10-28 09:04:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:21,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:22,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:26,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:04:26,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:26,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:26,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:26,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:26,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:26,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:26,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:26,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:26,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:26,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:26,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:26,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:26,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2020-10-28 09:04:26,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769694318] [2020-10-28 09:04:26,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:26,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:04:26,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247584720] [2020-10-28 09:04:26,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:04:26,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:26,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:04:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:04:26,796 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand 23 states. [2020-10-28 09:04:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:27,210 INFO L93 Difference]: Finished difference Result 311 states and 331 transitions. [2020-10-28 09:04:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:04:27,211 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-10-28 09:04:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:27,212 INFO L225 Difference]: With dead ends: 311 [2020-10-28 09:04:27,212 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 09:04:27,214 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 [2020-10-28 09:04:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 09:04:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-28 09:04:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 09:04:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2020-10-28 09:04:27,229 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 160 [2020-10-28 09:04:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:27,229 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2020-10-28 09:04:27,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:04:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2020-10-28 09:04:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 09:04:27,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:27,231 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 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, 1, 1, 1, 1] [2020-10-28 09:04:27,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:04:27,231 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:27,231 INFO L82 PathProgramCache]: Analyzing trace with hash -29630906, now seen corresponding path program 20 times [2020-10-28 09:04:27,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:27,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007870424] [2020-10-28 09:04:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:27,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:27,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:27,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:32,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:04:32,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:32,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:32,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:32,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-28 09:04:32,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007870424] [2020-10-28 09:04:32,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:32,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:04:32,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933770943] [2020-10-28 09:04:32,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:04:32,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:04:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:32,631 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand 24 states. [2020-10-28 09:04:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:33,124 INFO L93 Difference]: Finished difference Result 324 states and 344 transitions. [2020-10-28 09:04:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:04:33,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 167 [2020-10-28 09:04:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:33,129 INFO L225 Difference]: With dead ends: 324 [2020-10-28 09:04:33,129 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 09:04:33,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 09:04:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-28 09:04:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 09:04:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2020-10-28 09:04:33,151 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 167 [2020-10-28 09:04:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:33,152 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2020-10-28 09:04:33,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:04:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2020-10-28 09:04:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-28 09:04:33,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:33,153 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 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, 1, 1, 1, 1] [2020-10-28 09:04:33,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:04:33,153 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2103137487, now seen corresponding path program 21 times [2020-10-28 09:04:33,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:33,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636342991] [2020-10-28 09:04:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:34,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:04:38,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:38,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:38,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:38,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2020-10-28 09:04:38,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636342991] [2020-10-28 09:04:38,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:38,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:04:38,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310446940] [2020-10-28 09:04:38,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:04:38,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:04:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:38,632 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand 25 states. [2020-10-28 09:04:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:39,089 INFO L93 Difference]: Finished difference Result 337 states and 357 transitions. [2020-10-28 09:04:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:04:39,089 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-10-28 09:04:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:39,091 INFO L225 Difference]: With dead ends: 337 [2020-10-28 09:04:39,091 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 09:04:39,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 09:04:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-28 09:04:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 09:04:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2020-10-28 09:04:39,105 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 174 [2020-10-28 09:04:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:39,105 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2020-10-28 09:04:39,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:04:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2020-10-28 09:04:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 09:04:39,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:39,107 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 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, 1, 1, 1, 1] [2020-10-28 09:04:39,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:04:39,107 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash 614309862, now seen corresponding path program 22 times [2020-10-28 09:04:39,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:39,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142211542] [2020-10-28 09:04:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:39,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:39,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:39,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:39,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:40,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-28 09:04:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:04:44,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:44,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:44,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:44,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2020-10-28 09:04:44,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142211542] [2020-10-28 09:04:44,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:44,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:04:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033534231] [2020-10-28 09:04:44,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:04:44,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:04:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:44,597 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand 26 states. [2020-10-28 09:04:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:45,113 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2020-10-28 09:04:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:04:45,114 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 181 [2020-10-28 09:04:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:45,115 INFO L225 Difference]: With dead ends: 350 [2020-10-28 09:04:45,115 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 09:04:45,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 09:04:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-28 09:04:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 09:04:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2020-10-28 09:04:45,127 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 181 [2020-10-28 09:04:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:45,127 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2020-10-28 09:04:45,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:04:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2020-10-28 09:04:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-28 09:04:45,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:45,129 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 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, 1, 1, 1, 1] [2020-10-28 09:04:45,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:04:45,129 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1757400431, now seen corresponding path program 23 times [2020-10-28 09:04:45,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:45,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70367261] [2020-10-28 09:04:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:45,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:45,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:45,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:46,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:50,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:50,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-28 09:04:50,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:50,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 09:04:50,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:50,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:04:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:50,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:04:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:50,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:50,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-28 09:04:50,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70367261] [2020-10-28 09:04:50,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:50,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:04:50,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987544746] [2020-10-28 09:04:50,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:04:50,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:04:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:50,635 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand 27 states. [2020-10-28 09:04:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:51,179 INFO L93 Difference]: Finished difference Result 363 states and 383 transitions. [2020-10-28 09:04:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:04:51,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 188 [2020-10-28 09:04:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:51,181 INFO L225 Difference]: With dead ends: 363 [2020-10-28 09:04:51,181 INFO L226 Difference]: Without dead ends: 200 [2020-10-28 09:04:51,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-28 09:04:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-28 09:04:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 09:04:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-10-28 09:04:51,191 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 188 [2020-10-28 09:04:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:51,192 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-10-28 09:04:51,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:04:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-10-28 09:04:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-28 09:04:51,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:51,193 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 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, 1, 1, 1, 1] [2020-10-28 09:04:51,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:04:51,193 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:51,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1780070010, now seen corresponding path program 24 times [2020-10-28 09:04:51,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:51,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374395630] [2020-10-28 09:04:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:51,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:51,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:51,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:51,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:56,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:56,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-28 09:04:56,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:04:56,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 09:04:56,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:56,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:04:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:04:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:04:56,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:56,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:56,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:56,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:56,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:56,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:56,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:04:56,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:56,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:56,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:56,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:56,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:56,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:04:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-28 09:04:56,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374395630] [2020-10-28 09:04:56,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:56,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:04:56,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603934164] [2020-10-28 09:04:56,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:04:56,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:04:56,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:04:56,847 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 28 states. [2020-10-28 09:04:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:57,383 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2020-10-28 09:04:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:04:57,383 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 195 [2020-10-28 09:04:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:57,385 INFO L225 Difference]: With dead ends: 376 [2020-10-28 09:04:57,385 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 09:04:57,386 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 [2020-10-28 09:04:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 09:04:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-28 09:04:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-28 09:04:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2020-10-28 09:04:57,405 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 195 [2020-10-28 09:04:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:57,405 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2020-10-28 09:04:57,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:04:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2020-10-28 09:04:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-28 09:04:57,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:57,411 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 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, 1, 1, 1, 1] [2020-10-28 09:04:57,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:04:57,412 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:57,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1126739471, now seen corresponding path program 25 times [2020-10-28 09:04:57,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:57,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31075917] [2020-10-28 09:04:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:57,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:57,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:57,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:57,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:59,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:02,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:02,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 09:05:02,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:02,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:05:02,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:02,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:05:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-28 09:05:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:05:02,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:03,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:03,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:03,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:03,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:03,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:03,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:03,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:03,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:03,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:03,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:03,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2020-10-28 09:05:03,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31075917] [2020-10-28 09:05:03,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:03,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:05:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317941093] [2020-10-28 09:05:03,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:05:03,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:05:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:03,096 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand 29 states. [2020-10-28 09:05:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:03,675 INFO L93 Difference]: Finished difference Result 389 states and 409 transitions. [2020-10-28 09:05:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:05:03,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 202 [2020-10-28 09:05:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:03,677 INFO L225 Difference]: With dead ends: 389 [2020-10-28 09:05:03,677 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 09:05:03,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 09:05:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-28 09:05:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-28 09:05:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2020-10-28 09:05:03,691 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 202 [2020-10-28 09:05:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:03,691 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2020-10-28 09:05:03,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:05:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2020-10-28 09:05:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-28 09:05:03,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:03,693 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 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, 1, 1, 1, 1] [2020-10-28 09:05:03,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:05:03,694 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash 610786086, now seen corresponding path program 26 times [2020-10-28 09:05:03,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:03,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033071607] [2020-10-28 09:05:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:03,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:04,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:04,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:05,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:08,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:08,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:05:08,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:09,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:09,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:09,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:09,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:09,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:09,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:05:09,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:09,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:09,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:09,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:09,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:09,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2020-10-28 09:05:09,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033071607] [2020-10-28 09:05:09,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:09,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:05:09,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920387284] [2020-10-28 09:05:09,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:05:09,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:09,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:05:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:09,320 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand 30 states. [2020-10-28 09:05:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:09,929 INFO L93 Difference]: Finished difference Result 402 states and 422 transitions. [2020-10-28 09:05:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:05:09,930 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 209 [2020-10-28 09:05:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:09,931 INFO L225 Difference]: With dead ends: 402 [2020-10-28 09:05:09,932 INFO L226 Difference]: Without dead ends: 221 [2020-10-28 09:05:09,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-28 09:05:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-10-28 09:05:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-28 09:05:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 228 transitions. [2020-10-28 09:05:09,943 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 228 transitions. Word has length 209 [2020-10-28 09:05:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:09,943 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 228 transitions. [2020-10-28 09:05:09,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:05:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 228 transitions. [2020-10-28 09:05:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-28 09:05:09,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:09,945 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 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, 1, 1, 1, 1] [2020-10-28 09:05:09,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:05:09,945 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:09,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:09,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2024273583, now seen corresponding path program 27 times [2020-10-28 09:05:09,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:09,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456616316] [2020-10-28 09:05:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:10,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:10,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:10,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:12,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:15,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:15,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:05:15,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:15,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:15,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:15,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:15,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:15,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:15,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:15,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:15,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:15,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:15,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:15,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:15,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-28 09:05:15,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456616316] [2020-10-28 09:05:15,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:15,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:05:15,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742616215] [2020-10-28 09:05:15,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:05:15,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:05:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:15,686 INFO L87 Difference]: Start difference. First operand 221 states and 228 transitions. Second operand 31 states. [2020-10-28 09:05:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:16,311 INFO L93 Difference]: Finished difference Result 415 states and 435 transitions. [2020-10-28 09:05:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:05:16,311 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 216 [2020-10-28 09:05:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:16,313 INFO L225 Difference]: With dead ends: 415 [2020-10-28 09:05:16,313 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 09:05:16,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 09:05:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-28 09:05:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-28 09:05:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2020-10-28 09:05:16,321 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 216 [2020-10-28 09:05:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:16,322 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2020-10-28 09:05:16,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:05:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2020-10-28 09:05:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 09:05:16,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:16,323 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 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, 1, 1, 1, 1] [2020-10-28 09:05:16,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:05:16,324 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash 888427718, now seen corresponding path program 28 times [2020-10-28 09:05:16,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:16,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15510795] [2020-10-28 09:05:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:16,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:18,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:21,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:21,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 09:05:21,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:21,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:05:21,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:21,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:05:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-28 09:05:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:05:21,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:21,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:21,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:21,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:21,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:21,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:21,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:21,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:21,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:21,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:21,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2020-10-28 09:05:22,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15510795] [2020-10-28 09:05:22,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:22,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:05:22,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118958899] [2020-10-28 09:05:22,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:05:22,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:22,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:05:22,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:22,007 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand 32 states. [2020-10-28 09:05:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:22,649 INFO L93 Difference]: Finished difference Result 428 states and 448 transitions. [2020-10-28 09:05:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:05:22,649 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 223 [2020-10-28 09:05:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:22,651 INFO L225 Difference]: With dead ends: 428 [2020-10-28 09:05:22,651 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 09:05:22,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 09:05:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2020-10-28 09:05:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-28 09:05:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 242 transitions. [2020-10-28 09:05:22,662 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 242 transitions. Word has length 223 [2020-10-28 09:05:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:22,663 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 242 transitions. [2020-10-28 09:05:22,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:05:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 242 transitions. [2020-10-28 09:05:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-28 09:05:22,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:22,664 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 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, 1, 1, 1, 1] [2020-10-28 09:05:22,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:05:22,665 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2010097487, now seen corresponding path program 29 times [2020-10-28 09:05:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:22,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458335929] [2020-10-28 09:05:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:22,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:23,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:27,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:05:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:28,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:28,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:28,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:28,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:28,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:28,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:28,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:28,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:28,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:28,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:28,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:28,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2020-10-28 09:05:28,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458335929] [2020-10-28 09:05:28,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:28,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:05:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134020178] [2020-10-28 09:05:28,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:05:28,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:05:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:28,400 INFO L87 Difference]: Start difference. First operand 235 states and 242 transitions. Second operand 33 states. [2020-10-28 09:05:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:29,011 INFO L93 Difference]: Finished difference Result 441 states and 461 transitions. [2020-10-28 09:05:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:05:29,011 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 230 [2020-10-28 09:05:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:29,013 INFO L225 Difference]: With dead ends: 441 [2020-10-28 09:05:29,013 INFO L226 Difference]: Without dead ends: 242 [2020-10-28 09:05:29,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-28 09:05:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-28 09:05:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 09:05:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2020-10-28 09:05:29,025 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 230 [2020-10-28 09:05:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:29,025 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2020-10-28 09:05:29,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:05:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2020-10-28 09:05:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 09:05:29,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:29,027 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 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, 1, 1, 1, 1] [2020-10-28 09:05:29,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:05:29,027 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:29,027 INFO L82 PathProgramCache]: Analyzing trace with hash -555895194, now seen corresponding path program 30 times [2020-10-28 09:05:29,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:29,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087385983] [2020-10-28 09:05:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:29,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:29,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:29,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:29,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:31,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:34,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:34,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-28 09:05:34,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:34,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:05:34,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:34,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:05:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:05:34,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:34,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:34,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:34,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:34,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:34,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:34,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:05:34,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:34,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:34,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3255 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2020-10-28 09:05:34,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087385983] [2020-10-28 09:05:34,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:34,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:05:34,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208230261] [2020-10-28 09:05:34,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:05:34,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:05:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:34,792 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand 34 states. [2020-10-28 09:05:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:35,534 INFO L93 Difference]: Finished difference Result 454 states and 474 transitions. [2020-10-28 09:05:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:05:35,534 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 237 [2020-10-28 09:05:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:35,536 INFO L225 Difference]: With dead ends: 454 [2020-10-28 09:05:35,536 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 09:05:35,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 09:05:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2020-10-28 09:05:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-28 09:05:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 256 transitions. [2020-10-28 09:05:35,548 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 256 transitions. Word has length 237 [2020-10-28 09:05:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:35,548 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 256 transitions. [2020-10-28 09:05:35,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:05:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 256 transitions. [2020-10-28 09:05:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-28 09:05:35,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:35,551 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 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, 1, 1, 1, 1] [2020-10-28 09:05:35,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:05:35,551 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash 776880145, now seen corresponding path program 31 times [2020-10-28 09:05:35,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:35,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664254978] [2020-10-28 09:05:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:35,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:36,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:36,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:36,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:40,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:40,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-28 09:05:40,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:05:40,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:40,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:05:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:05:40,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:41,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:41,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:41,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:41,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:41,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:41,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:41,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:41,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:41,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:41,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:41,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:41,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2020-10-28 09:05:41,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664254978] [2020-10-28 09:05:41,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:41,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:05:41,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569027995] [2020-10-28 09:05:41,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:05:41,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:41,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:05:41,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:41,354 INFO L87 Difference]: Start difference. First operand 249 states and 256 transitions. Second operand 35 states. [2020-10-28 09:05:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:42,015 INFO L93 Difference]: Finished difference Result 467 states and 487 transitions. [2020-10-28 09:05:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:05:42,015 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 244 [2020-10-28 09:05:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:42,018 INFO L225 Difference]: With dead ends: 467 [2020-10-28 09:05:42,018 INFO L226 Difference]: Without dead ends: 256 [2020-10-28 09:05:42,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-28 09:05:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-28 09:05:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-28 09:05:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2020-10-28 09:05:42,029 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 244 [2020-10-28 09:05:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:42,029 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2020-10-28 09:05:42,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:05:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2020-10-28 09:05:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-28 09:05:42,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:42,031 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 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, 1, 1, 1, 1] [2020-10-28 09:05:42,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:05:42,031 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 200671238, now seen corresponding path program 32 times [2020-10-28 09:05:42,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:42,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602236785] [2020-10-28 09:05:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:42,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:42,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:44,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:47,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:47,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-28 09:05:47,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 09:05:47,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:47,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:05:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:05:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:05:47,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:47,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:47,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:47,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:47,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:47,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:47,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:47,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:47,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:47,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3696 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3168 trivial. 0 not checked. [2020-10-28 09:05:47,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602236785] [2020-10-28 09:05:47,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:47,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:05:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580257215] [2020-10-28 09:05:47,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:05:47,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:05:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:05:47,895 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand 36 states. [2020-10-28 09:05:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:48,637 INFO L93 Difference]: Finished difference Result 480 states and 500 transitions. [2020-10-28 09:05:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:05:48,637 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 251 [2020-10-28 09:05:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:48,639 INFO L225 Difference]: With dead ends: 480 [2020-10-28 09:05:48,639 INFO L226 Difference]: Without dead ends: 263 [2020-10-28 09:05:48,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:05:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-28 09:05:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2020-10-28 09:05:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 09:05:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 270 transitions. [2020-10-28 09:05:48,650 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 270 transitions. Word has length 251 [2020-10-28 09:05:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:48,650 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 270 transitions. [2020-10-28 09:05:48,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:05:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 270 transitions. [2020-10-28 09:05:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-28 09:05:48,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:48,652 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 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, 1, 1, 1, 1] [2020-10-28 09:05:48,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:05:48,653 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1507868815, now seen corresponding path program 33 times [2020-10-28 09:05:48,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:48,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916269650] [2020-10-28 09:05:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:48,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:49,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:49,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:51,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 09:05:53,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:05:53,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:54,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:54,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:54,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:54,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:54,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:54,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:54,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:54,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:54,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:54,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:54,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:54,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2020-10-28 09:05:54,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916269650] [2020-10-28 09:05:54,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:54,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:05:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429555978] [2020-10-28 09:05:54,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:05:54,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:05:54,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:05:54,615 INFO L87 Difference]: Start difference. First operand 263 states and 270 transitions. Second operand 37 states. [2020-10-28 09:05:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:55,389 INFO L93 Difference]: Finished difference Result 493 states and 513 transitions. [2020-10-28 09:05:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:05:55,390 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 258 [2020-10-28 09:05:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:55,392 INFO L225 Difference]: With dead ends: 493 [2020-10-28 09:05:55,393 INFO L226 Difference]: Without dead ends: 270 [2020-10-28 09:05:55,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:05:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-28 09:05:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-28 09:05:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-28 09:05:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2020-10-28 09:05:55,402 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 258 [2020-10-28 09:05:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:55,403 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2020-10-28 09:05:55,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:05:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2020-10-28 09:05:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-28 09:05:55,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:55,405 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 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, 1, 1, 1, 1] [2020-10-28 09:05:55,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:05:55,405 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1735446106, now seen corresponding path program 34 times [2020-10-28 09:05:55,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:55,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280207863] [2020-10-28 09:05:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:55,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:55,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:56,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:58,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:00,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:00,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 09:06:00,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:00,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 09:06:00,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:00,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:00,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:06:00,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-28 09:06:00,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:06:00,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:01,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:01,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:01,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:01,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:01,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4165 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2020-10-28 09:06:01,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280207863] [2020-10-28 09:06:01,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:01,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:06:01,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113292298] [2020-10-28 09:06:01,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:06:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:06:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:01,413 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand 38 states. [2020-10-28 09:06:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:02,200 INFO L93 Difference]: Finished difference Result 506 states and 526 transitions. [2020-10-28 09:06:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:06:02,200 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 265 [2020-10-28 09:06:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:02,203 INFO L225 Difference]: With dead ends: 506 [2020-10-28 09:06:02,203 INFO L226 Difference]: Without dead ends: 277 [2020-10-28 09:06:02,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:02,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-28 09:06:02,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-28 09:06:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-28 09:06:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 284 transitions. [2020-10-28 09:06:02,213 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 284 transitions. Word has length 265 [2020-10-28 09:06:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:02,214 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 284 transitions. [2020-10-28 09:06:02,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:06:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 284 transitions. [2020-10-28 09:06:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-28 09:06:02,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:02,216 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 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, 1, 1, 1, 1] [2020-10-28 09:06:02,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:06:02,216 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1181559087, now seen corresponding path program 35 times [2020-10-28 09:06:02,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:02,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807053146] [2020-10-28 09:06:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:02,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:02,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:03,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:05,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:07,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:07,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-28 09:06:07,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:07,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 09:06:07,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:07,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:07,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:06:07,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 09:06:07,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:06:07,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:08,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:08,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:08,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:08,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3780 trivial. 0 not checked. [2020-10-28 09:06:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807053146] [2020-10-28 09:06:08,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:08,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:06:08,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891542644] [2020-10-28 09:06:08,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:06:08,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:08,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:06:08,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:06:08,245 INFO L87 Difference]: Start difference. First operand 277 states and 284 transitions. Second operand 39 states. [2020-10-28 09:06:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:08,949 INFO L93 Difference]: Finished difference Result 519 states and 539 transitions. [2020-10-28 09:06:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:06:08,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 272 [2020-10-28 09:06:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:08,951 INFO L225 Difference]: With dead ends: 519 [2020-10-28 09:06:08,952 INFO L226 Difference]: Without dead ends: 284 [2020-10-28 09:06:08,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:06:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-28 09:06:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-10-28 09:06:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-28 09:06:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2020-10-28 09:06:08,962 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 272 [2020-10-28 09:06:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:08,962 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2020-10-28 09:06:08,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:06:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2020-10-28 09:06:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-28 09:06:08,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:08,964 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 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, 1, 1, 1, 1] [2020-10-28 09:06:08,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:06:08,965 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1937460038, now seen corresponding path program 36 times [2020-10-28 09:06:08,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:08,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846068568] [2020-10-28 09:06:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:09,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:09,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:09,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:12,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:14,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:14,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-28 09:06:14,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:14,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 09:06:14,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:14,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:06:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:14,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:06:14,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:15,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:15,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:15,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:15,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:15,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:15,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:15,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:15,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3996 trivial. 0 not checked. [2020-10-28 09:06:15,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846068568] [2020-10-28 09:06:15,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:15,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:06:15,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187878989] [2020-10-28 09:06:15,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:06:15,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:15,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:06:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:06:15,092 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand 40 states. [2020-10-28 09:06:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:15,827 INFO L93 Difference]: Finished difference Result 532 states and 552 transitions. [2020-10-28 09:06:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:06:15,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 279 [2020-10-28 09:06:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:15,829 INFO L225 Difference]: With dead ends: 532 [2020-10-28 09:06:15,830 INFO L226 Difference]: Without dead ends: 291 [2020-10-28 09:06:15,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:06:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-28 09:06:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2020-10-28 09:06:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-28 09:06:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 298 transitions. [2020-10-28 09:06:15,840 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 298 transitions. Word has length 279 [2020-10-28 09:06:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:15,840 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 298 transitions. [2020-10-28 09:06:15,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:06:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 298 transitions. [2020-10-28 09:06:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-28 09:06:15,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:15,842 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 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, 1, 1, 1, 1] [2020-10-28 09:06:15,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:06:15,843 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:15,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1340766671, now seen corresponding path program 37 times [2020-10-28 09:06:15,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:15,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126773255] [2020-10-28 09:06:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:16,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:16,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:16,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:20,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 09:06:20,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:21,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:21,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:21,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:21,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:21,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:21,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:21,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:21,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:21,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:21,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:21,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:21,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4921 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 4218 trivial. 0 not checked. [2020-10-28 09:06:21,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126773255] [2020-10-28 09:06:21,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:21,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:06:21,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662060926] [2020-10-28 09:06:21,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:06:21,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:21,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:06:21,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:06:21,884 INFO L87 Difference]: Start difference. First operand 291 states and 298 transitions. Second operand 41 states. [2020-10-28 09:06:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:22,742 INFO L93 Difference]: Finished difference Result 545 states and 565 transitions. [2020-10-28 09:06:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:06:22,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 286 [2020-10-28 09:06:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:22,745 INFO L225 Difference]: With dead ends: 545 [2020-10-28 09:06:22,745 INFO L226 Difference]: Without dead ends: 298 [2020-10-28 09:06:22,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:06:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-28 09:06:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-10-28 09:06:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-28 09:06:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 305 transitions. [2020-10-28 09:06:22,756 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 305 transitions. Word has length 286 [2020-10-28 09:06:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:22,756 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 305 transitions. [2020-10-28 09:06:22,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:06:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 305 transitions. [2020-10-28 09:06:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-28 09:06:22,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:22,758 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 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, 1, 1, 1, 1] [2020-10-28 09:06:22,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:06:22,759 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1106490138, now seen corresponding path program 38 times [2020-10-28 09:06:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:22,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376917151] [2020-10-28 09:06:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:22,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:23,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:23,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking...