/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/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:09:35,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:09:35,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:09:35,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:09:35,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:09:35,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:09:35,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:09:35,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:09:35,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:09:35,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:09:35,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:09:35,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:09:35,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:09:35,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:09:35,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:09:35,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:09:35,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:09:35,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:09:35,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:09:35,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:09:35,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:09:35,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:09:35,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:09:35,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:09:35,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:09:35,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:09:35,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:09:35,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:09:35,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:09:35,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:09:35,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:09:35,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:09:35,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:09:35,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:09:35,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:09:35,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:09:35,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:09:35,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:09:35,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:09:35,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:09:35,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:09:35,834 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 15:09:35,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:09:35,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:09:35,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:09:35,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:09:35,889 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:09:35,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:09:35,890 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:09:35,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:09:35,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:09:35,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:09:35,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:09:35,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:09:35,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:09:35,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:09:35,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:09:35,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:09:35,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:09:35,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:09:35,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:09:35,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:09:35,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:09:35,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:09:35,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:09:35,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:09:35,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:09:35,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:09:35,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:09:35,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:09:35,897 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:09:35,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:09:36,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:09:36,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:09:36,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:09:36,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:09:36,352 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:09:36,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-28 15:09:36,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57cd925e4/62b2c0eae0724777b8ea747b79164d8a/FLAGd3101ce68 [2020-10-28 15:09:37,085 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:09:37,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-28 15:09:37,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57cd925e4/62b2c0eae0724777b8ea747b79164d8a/FLAGd3101ce68 [2020-10-28 15:09:37,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57cd925e4/62b2c0eae0724777b8ea747b79164d8a [2020-10-28 15:09:37,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:09:37,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:09:37,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:09:37,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:09:37,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:09:37,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea5aa11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37, skipping insertion in model container [2020-10-28 15:09:37,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:09:37,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:09:37,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:09:37,770 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:09:37,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:09:37,804 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:09:37,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37 WrapperNode [2020-10-28 15:09:37,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:09:37,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:09:37,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:09:37,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:09:37,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... [2020-10-28 15:09:37,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:09:37,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:09:37,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:09:37,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:09:37,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:09:37,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:09:37,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:09:37,917 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:09:37,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:09:37,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:09:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:09:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:09:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:09:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:09:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:09:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:09:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:09:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:09:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:09:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:09:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:09:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:09:38,161 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:09:38,161 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:09:38,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:09:38 BoogieIcfgContainer [2020-10-28 15:09:38,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:09:38,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:09:38,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:09:38,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:09:38,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:09:37" (1/3) ... [2020-10-28 15:09:38,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4add6621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:09:38, skipping insertion in model container [2020-10-28 15:09:38,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:37" (2/3) ... [2020-10-28 15:09:38,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4add6621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:09:38, skipping insertion in model container [2020-10-28 15:09:38,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:09:38" (3/3) ... [2020-10-28 15:09:38,177 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2020-10-28 15:09:38,194 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:09:38,201 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:09:38,238 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:09:38,271 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:09:38,271 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:09:38,271 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:09:38,272 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:09:38,272 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:09:38,272 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:09:38,272 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:09:38,272 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:09:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 15:09:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:09:38,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:38,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:38,312 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:38,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1441742757, now seen corresponding path program 1 times [2020-10-28 15:09:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:38,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706287107] [2020-10-28 15:09:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:38,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:39,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:09:39,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:39,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-28 15:09:39,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:39,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:09:39,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:39,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:09:39,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:39,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:39,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:39,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:09:39,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:39,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:39,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:39,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:39,258 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 15:09:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706287107] [2020-10-28 15:09:39,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:09:39,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:09:39,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951430687] [2020-10-28 15:09:39,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:09:39,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:09:39,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:09:39,285 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-28 15:09:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:39,350 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 15:09:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:09:39,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:09:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:39,360 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:09:39,360 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 15:09:39,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:09:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 15:09:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 15:09:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:09:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 15:09:39,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-28 15:09:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:39,408 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 15:09:39,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:09:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 15:09:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:09:39,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:39,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:39,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:09:39,410 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1126822096, now seen corresponding path program 1 times [2020-10-28 15:09:39,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:39,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881816075] [2020-10-28 15:09:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:39,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:09:39,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-28 15:09:39,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:39,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:39,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:09:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:09:39,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:39,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:39,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:39,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:39,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:39,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:09:39,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:39,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:39,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:39,779 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 15:09:39,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881816075] [2020-10-28 15:09:39,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:09:39,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:09:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13063499] [2020-10-28 15:09:39,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:09:39,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:39,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:09:39,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:09:39,784 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 15:09:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:39,885 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 15:09:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:09:39,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 15:09:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:39,887 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:09:39,887 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:09:39,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:09:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:09:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-28 15:09:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:09:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 15:09:39,896 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 15:09:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:39,896 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 15:09:39,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:09:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 15:09:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:09:39,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:39,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:39,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:09:39,898 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:39,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1794150295, now seen corresponding path program 1 times [2020-10-28 15:09:39,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:39,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427626132] [2020-10-28 15:09:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:39,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:40,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:09:40,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:40,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 15:09:40,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:40,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:09:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:09:40,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:40,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:40,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:40,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:40,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:09:40,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:40,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:40,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:40,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:40,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:40,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:40,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427626132] [2020-10-28 15:09:40,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:40,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:09:40,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528336475] [2020-10-28 15:09:40,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:09:40,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:40,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:09:40,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:09:40,152 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-28 15:09:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:40,288 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-28 15:09:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:09:40,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 15:09:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:40,289 INFO L225 Difference]: With dead ends: 27 [2020-10-28 15:09:40,289 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:09:40,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:09:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 15:09:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:09:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 15:09:40,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 15:09:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:40,297 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 15:09:40,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:09:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 15:09:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:09:40,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:40,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:40,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:09:40,298 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash -150266320, now seen corresponding path program 2 times [2020-10-28 15:09:40,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:40,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906387192] [2020-10-28 15:09:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:40,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:40,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:09:40,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:40,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-28 15:09:40,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:40,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:40,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:09:40,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:40,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:09:40,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:40,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:40,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:40,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:40,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:09:40,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:40,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:40,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:40,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:40,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906387192] [2020-10-28 15:09:40,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:40,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:09:40,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223248840] [2020-10-28 15:09:40,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:09:40,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:40,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:09:40,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:09:40,739 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-28 15:09:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:40,870 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-28 15:09:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:09:40,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 15:09:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:40,871 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:09:40,871 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:09:40,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:09:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 15:09:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:09:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 15:09:40,878 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-28 15:09:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:40,879 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 15:09:40,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:09:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 15:09:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:09:40,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:40,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:40,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:09:40,880 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash -258548368, now seen corresponding path program 1 times [2020-10-28 15:09:40,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:40,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646773150] [2020-10-28 15:09:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:40,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:41,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:09:41,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:41,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-28 15:09:41,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:41,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:41,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:09:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:41,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:09:41,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:41,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:41,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:41,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:41,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:41,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:09:41,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:41,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:41,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:09:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646773150] [2020-10-28 15:09:41,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:09:41,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:09:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151946476] [2020-10-28 15:09:41,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:09:41,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:41,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:09:41,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:09:41,332 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-28 15:09:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:41,539 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-28 15:09:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:09:41,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:09:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:41,540 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:09:41,540 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:09:41,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:09:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 15:09:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:09:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 15:09:41,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-10-28 15:09:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:41,552 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 15:09:41,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:09:41,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 15:09:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:09:41,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:41,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:41,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:09:41,554 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:41,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1270071241, now seen corresponding path program 1 times [2020-10-28 15:09:41,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:41,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965957841] [2020-10-28 15:09:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:42,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:42,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:09:42,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:09:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 773 [2020-10-28 15:09:42,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:42,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:09:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:42,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:09:42,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:42,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:42,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:42,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:42,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:42,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:42,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:42,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:42,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:42,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:42,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:09:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:09:42,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965957841] [2020-10-28 15:09:42,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:42,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:09:42,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316087841] [2020-10-28 15:09:42,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:09:42,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:42,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:09:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:42,481 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-28 15:09:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:42,736 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-28 15:09:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:09:42,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 15:09:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:42,738 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:09:42,738 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 15:09:42,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 15:09:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 15:09:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:09:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-28 15:09:42,752 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-10-28 15:09:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:42,753 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-28 15:09:42,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:09:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-28 15:09:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:09:42,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:42,754 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:42,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:09:42,755 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:42,756 INFO L82 PathProgramCache]: Analyzing trace with hash 838603472, now seen corresponding path program 2 times [2020-10-28 15:09:42,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:42,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196394795] [2020-10-28 15:09:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:42,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:42,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:42,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:42,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:43,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:44,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:44,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:09:44,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:09:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1590 [2020-10-28 15:09:44,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:44,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:09:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:44,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:09:44,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:44,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:44,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:44,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:44,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:44,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:44,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:09:44,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:44,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:44,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:44,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:09:44,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196394795] [2020-10-28 15:09:44,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:44,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:09:44,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376263394] [2020-10-28 15:09:44,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:09:44,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:44,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:09:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:09:44,526 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-10-28 15:09:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:44,801 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-28 15:09:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:09:44,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 15:09:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:44,803 INFO L225 Difference]: With dead ends: 35 [2020-10-28 15:09:44,803 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:09:44,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:09:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:09:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 15:09:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:09:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 15:09:44,816 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-10-28 15:09:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:44,816 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 15:09:44,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:09:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 15:09:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:09:44,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:44,818 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:44,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:09:44,818 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1819414121, now seen corresponding path program 3 times [2020-10-28 15:09:44,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:44,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965306436] [2020-10-28 15:09:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:44,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:44,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:44,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:46,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:46,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:09:46,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:46,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2057 [2020-10-28 15:09:46,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:46,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:46,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:09:46,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:46,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:09:46,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:47,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:47,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:47,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:47,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:47,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:47,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:47,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:47,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:47,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:47,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965306436] [2020-10-28 15:09:47,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:47,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:09:47,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398170065] [2020-10-28 15:09:47,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:09:47,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:47,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:09:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:09:47,022 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2020-10-28 15:09:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:47,315 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-28 15:09:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:09:47,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 15:09:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:47,317 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:09:47,317 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:09:47,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:09:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:09:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 15:09:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:09:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 15:09:47,325 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-28 15:09:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:47,326 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 15:09:47,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:09:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 15:09:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:47,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:47,327 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:47,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:09:47,328 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2090238162, now seen corresponding path program 4 times [2020-10-28 15:09:47,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:47,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944590078] [2020-10-28 15:09:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:47,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:47,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:47,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:47,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:49,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:52,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:52,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:52,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:09:52,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:09:52,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:52,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:09:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:09:52,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:52,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:52,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:52,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:52,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:52,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:52,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:52,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:52,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:52,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 15:09:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944590078] [2020-10-28 15:09:52,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:52,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:09:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720129356] [2020-10-28 15:09:52,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:09:52,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:52,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:09:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:52,515 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2020-10-28 15:09:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:52,831 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-28 15:09:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:09:52,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-28 15:09:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:52,833 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:09:52,833 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:09:52,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:09:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:09:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 15:09:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:09:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-28 15:09:52,849 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 36 [2020-10-28 15:09:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:52,849 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-28 15:09:52,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:09:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-28 15:09:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:09:52,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:52,852 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:52,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:09:52,852 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 362400039, now seen corresponding path program 5 times [2020-10-28 15:09:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:52,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426059655] [2020-10-28 15:09:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:52,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:52,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:54,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:54,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:57,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:57,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:09:57,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:09:57,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:09:57,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:57,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:57,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:57,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:57,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:09:57,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:58,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:58,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:58,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:58,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:58,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:58,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:58,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:58,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 15:09:58,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426059655] [2020-10-28 15:09:58,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:58,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924450263] [2020-10-28 15:09:58,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:58,046 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 10 states. [2020-10-28 15:09:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:58,456 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-28 15:09:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:58,456 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-28 15:09:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:58,457 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:09:58,457 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:09:58,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:09:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 15:09:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:09:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 15:09:58,474 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 39 [2020-10-28 15:09:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:58,475 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 15:09:58,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 15:09:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:09:58,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:58,479 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:58,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:09:58,479 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1519920306, now seen corresponding path program 6 times [2020-10-28 15:09:58,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:58,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038400002] [2020-10-28 15:09:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:58,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:03,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:03,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:10:03,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:10:03,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:10:03,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:03,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:03,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:10:03,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:03,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:10:03,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:03,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:03,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:03,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:03,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:03,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:03,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:10:03,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:03,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:03,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:10:04,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038400002] [2020-10-28 15:10:04,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:04,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:10:04,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117761906] [2020-10-28 15:10:04,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:10:04,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:10:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:04,015 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 13 states. [2020-10-28 15:10:04,662 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-28 15:10:04,866 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 15:10:05,093 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 15:10:05,403 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 15:10:08,529 WARN L193 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-28 15:10:08,879 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-28 15:10:09,408 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-28 15:10:09,761 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-28 15:10:13,809 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-28 15:10:16,490 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-28 15:10:17,021 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-28 15:10:19,700 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-28 15:10:22,114 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-28 15:10:22,868 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 15:10:23,445 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 15:10:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:28,125 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2020-10-28 15:10:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:10:28,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-28 15:10:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:28,129 INFO L225 Difference]: With dead ends: 131 [2020-10-28 15:10:28,129 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 15:10:28,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=374, Invalid=883, Unknown=3, NotChecked=0, Total=1260 [2020-10-28 15:10:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 15:10:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 52. [2020-10-28 15:10:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:10:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-28 15:10:28,150 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 42 [2020-10-28 15:10:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:28,150 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-28 15:10:28,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:10:28,151 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-28 15:10:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:10:28,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:28,152 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:28,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:10:28,152 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 215994727, now seen corresponding path program 7 times [2020-10-28 15:10:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:28,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304291265] [2020-10-28 15:10:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:29,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:29,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:29,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:29,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:29,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:29,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:33,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:10:33,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:10:33,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:10:33,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:33,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:33,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:10:33,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:33,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:10:33,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:33,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:33,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:33,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:33,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:33,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:33,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:33,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:33,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:33,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:10:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304291265] [2020-10-28 15:10:33,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:33,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:10:33,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973758356] [2020-10-28 15:10:33,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:10:33,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:10:33,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:33,474 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 13 states. [2020-10-28 15:10:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:34,169 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-10-28 15:10:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:10:34,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 15:10:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:34,171 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:10:34,171 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 15:10:34,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:10:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 15:10:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-28 15:10:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:10:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-28 15:10:34,194 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 51 [2020-10-28 15:10:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:34,195 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-28 15:10:34,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:10:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-28 15:10:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:10:34,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:34,198 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:34,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:10:34,200 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash -528284304, now seen corresponding path program 8 times [2020-10-28 15:10:34,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:34,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780137193] [2020-10-28 15:10:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:10:39,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:10:39,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 15:10:39,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 15:10:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:10:39,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:39,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:39,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:39,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:39,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:39,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:39,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:39,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:39,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:39,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-28 15:10:39,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780137193] [2020-10-28 15:10:39,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:39,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:10:39,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483408999] [2020-10-28 15:10:39,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:10:39,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:10:39,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:10:39,561 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 14 states. [2020-10-28 15:10:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:40,438 INFO L93 Difference]: Finished difference Result 207 states and 259 transitions. [2020-10-28 15:10:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:10:40,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-28 15:10:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:40,442 INFO L225 Difference]: With dead ends: 207 [2020-10-28 15:10:40,443 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 15:10:40,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:10:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 15:10:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 70. [2020-10-28 15:10:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:10:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-28 15:10:40,466 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 66 [2020-10-28 15:10:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:40,467 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-28 15:10:40,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:10:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-28 15:10:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 15:10:40,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:40,468 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:40,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:10:40,469 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1450612681, now seen corresponding path program 9 times [2020-10-28 15:10:40,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:40,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767342305] [2020-10-28 15:10:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:44,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:10:45,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 15:10:45,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:48,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:48,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:48,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:48,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:48,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:48,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:48,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:48,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:48,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 369 refuted. 63 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 15:11:48,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767342305] [2020-10-28 15:11:48,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:48,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:11:48,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589065727] [2020-10-28 15:11:48,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:11:48,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:48,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:11:48,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=30, NotChecked=0, Total=240 [2020-10-28 15:11:48,314 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 16 states. [2020-10-28 15:11:49,061 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-28 15:11:49,255 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 15:11:49,585 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 15:11:49,937 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 15:11:50,614 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-28 15:11:51,594 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-28 15:11:52,353 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-28 15:11:53,093 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-28 15:11:53,917 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-28 15:11:55,739 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-28 15:11:58,686 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-28 15:11:59,805 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2020-10-28 15:12:02,686 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 126 DAG size of output: 56 [2020-10-28 15:12:05,517 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 130 DAG size of output: 60 [2020-10-28 15:12:07,699 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 56 [2020-10-28 15:12:13,349 WARN L193 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 140 DAG size of output: 60 [2020-10-28 15:12:23,277 WARN L193 SmtUtils]: Spent 9.70 s on a formula simplification. DAG size of input: 146 DAG size of output: 56 [2020-10-28 15:12:30,691 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 130 DAG size of output: 60 [2020-10-28 15:12:36,541 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2020-10-28 15:12:41,400 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-28 15:13:07,582 WARN L193 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 136 DAG size of output: 56 [2020-10-28 15:13:14,560 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-28 15:13:16,463 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-28 15:13:17,569 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 15:13:18,501 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 15:13:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:35,952 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2020-10-28 15:13:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:13:35,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-28 15:13:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:35,954 INFO L225 Difference]: With dead ends: 140 [2020-10-28 15:13:35,954 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 15:13:35,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 159.4s TimeCoverageRelationStatistics Valid=682, Invalid=1637, Unknown=33, NotChecked=0, Total=2352 [2020-10-28 15:13:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 15:13:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 76. [2020-10-28 15:13:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 15:13:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-28 15:13:35,994 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 69 [2020-10-28 15:13:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:35,995 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-28 15:13:35,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:13:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-28 15:13:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 15:13:36,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:36,003 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:36,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:13:36,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 531818089, now seen corresponding path program 10 times [2020-10-28 15:13:36,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:36,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649775081] [2020-10-28 15:13:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:36,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:36,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:41,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:41,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 15:13:41,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:13:41,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 15:13:41,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:41,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:41,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:13:41,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:41,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 15:13:41,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0