/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/res2o.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:15:34,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:15:34,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:15:34,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:15:34,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:15:34,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:15:34,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:15:34,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:15:34,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:15:34,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:15:34,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:15:34,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:15:34,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:15:34,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:15:34,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:15:34,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:15:34,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:15:34,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:15:34,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:15:34,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:15:34,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:15:34,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:15:34,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:15:34,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:15:34,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:15:34,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:15:34,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:15:34,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:15:34,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:15:34,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:15:34,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:15:34,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:15:34,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:15:34,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:15:34,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:15:34,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:15:34,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:15:34,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:15:34,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:15:34,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:15:34,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:15:34,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:15:34,983 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:15:34,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:15:34,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:15:34,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:15:34,988 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:15:34,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:15:34,989 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:15:34,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:15:34,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:15:34,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:15:34,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:15:34,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:15:34,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:15:34,992 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:15:34,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:15:34,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:15:34,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:15:34,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:15:34,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:15:34,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:15:34,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:15:34,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:15:34,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:15:34,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:15:34,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:15:34,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:15:34,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:15:34,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:15:34,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:15:34,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:15:35,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:15:35,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:15:35,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:15:35,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:15:35,491 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:15:35,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2o.c [2020-10-28 09:15:35,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e7adc587/63788863ee3b414988ae46ae72c0c3a9/FLAG168f7120e [2020-10-28 09:15:36,427 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:15:36,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2o.c [2020-10-28 09:15:36,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e7adc587/63788863ee3b414988ae46ae72c0c3a9/FLAG168f7120e [2020-10-28 09:15:36,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e7adc587/63788863ee3b414988ae46ae72c0c3a9 [2020-10-28 09:15:36,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:15:36,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:15:36,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:36,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:15:36,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:15:36,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:36" (1/1) ... [2020-10-28 09:15:36,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b885834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:36, skipping insertion in model container [2020-10-28 09:15:36,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:15:36" (1/1) ... [2020-10-28 09:15:36,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:15:36,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:15:37,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:37,083 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:15:37,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:15:37,126 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:15:37,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37 WrapperNode [2020-10-28 09:15:37,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:15:37,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:15:37,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:15:37,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:15:37,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (1/1) ... [2020-10-28 09:15:37,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (1/1) ... [2020-10-28 09:15:37,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (1/1) ... [2020-10-28 09:15:37,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (1/1) ... [2020-10-28 09:15:37,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (1/1) ... [2020-10-28 09:15:37,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (1/1) ... [2020-10-28 09:15:37,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (1/1) ... [2020-10-28 09:15:37,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:15:37,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:15:37,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:15:37,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:15:37,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (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 09:15:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:15:37,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:15:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:15:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:15:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:15:37,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:15:37,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:15:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:15:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:15:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:15:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:15:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:15:37,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:15:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:15:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:15:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:15:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:15:37,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:15:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:15:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:15:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:15:37,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:15:37,935 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:15:37,936 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 09:15:37,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:37 BoogieIcfgContainer [2020-10-28 09:15:37,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:15:37,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:15:37,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:15:37,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:15:37,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:15:36" (1/3) ... [2020-10-28 09:15:37,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9b16fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:37, skipping insertion in model container [2020-10-28 09:15:37,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:15:37" (2/3) ... [2020-10-28 09:15:37,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9b16fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:15:37, skipping insertion in model container [2020-10-28 09:15:37,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:15:37" (3/3) ... [2020-10-28 09:15:37,953 INFO L111 eAbstractionObserver]: Analyzing ICFG res2o.c [2020-10-28 09:15:37,969 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:15:37,976 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:15:37,993 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:15:38,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:15:38,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:15:38,048 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:15:38,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:15:38,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:15:38,050 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:15:38,050 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:15:38,050 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:15:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-28 09:15:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:15:38,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:38,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:38,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1686177906, now seen corresponding path program 1 times [2020-10-28 09:15:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:38,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188789770] [2020-10-28 09:15:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:38,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:41,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:41,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:15:41,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:15:41,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3438 [2020-10-28 09:15:41,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:41,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:15:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:41,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:15:41,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:41,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:41,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:41,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:41,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:41,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:15:41,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:41,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:41,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:41,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:41,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:41,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:41,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:41,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:41,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:15:41,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:15:41,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:41,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:41,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:41,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:41,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:41,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:41,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188789770] [2020-10-28 09:15:41,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:41,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:15:41,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809516842] [2020-10-28 09:15:41,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:15:41,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:15:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:15:41,899 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-28 09:15:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:42,045 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2020-10-28 09:15:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:15:42,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-28 09:15:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:42,074 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:15:42,075 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 09:15:42,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:15:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 09:15:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 09:15:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 09:15:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-28 09:15:42,130 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-28 09:15:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:42,131 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-28 09:15:42,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:15:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-28 09:15:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:15:42,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:42,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:42,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:15:42,133 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:42,134 INFO L82 PathProgramCache]: Analyzing trace with hash -961350168, now seen corresponding path program 1 times [2020-10-28 09:15:42,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:42,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248907158] [2020-10-28 09:15:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:42,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:42,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:43,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:47,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:15:47,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:15:47,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:15:47,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:47,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:47,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:15:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:15:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:15:47,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:15:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:47,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:47,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:47,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:47,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:15:47,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:47,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:47,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:47,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:47,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:47,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:47,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:47,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:47,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:47,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:15:47,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:47,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:47,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:15:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:15:47,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:15:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:47,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248907158] [2020-10-28 09:15:47,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:15:47,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:15:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851194431] [2020-10-28 09:15:47,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:15:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:15:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:15:47,383 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 5 states. [2020-10-28 09:15:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:47,712 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-28 09:15:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:15:47,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-28 09:15:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:47,715 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:15:47,715 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 09:15:47,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:15:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 09:15:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 09:15:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 09:15:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-28 09:15:47,745 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 30 [2020-10-28 09:15:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:47,746 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-28 09:15:47,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:15:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-28 09:15:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:15:47,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:47,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:47,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:15:47,750 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:47,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:47,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1706440668, now seen corresponding path program 1 times [2020-10-28 09:15:47,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455477743] [2020-10-28 09:15:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:47,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:48,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:49,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:50,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:51,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:52,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:52,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:15:52,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:15:52,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-28 09:15:52,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:52,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:52,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:15:52,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:15:52,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:15:52,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:15:53,603 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-28 09:15:54,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:15:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:54,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:54,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:54,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:15:54,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:54,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:15:54,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:54,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:54,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:54,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:54,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:15:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:54,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:54,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:15:54,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:15:54,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:15:54,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:15:54,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:15:54,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:15:54,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:15:54,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:15:54,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:15:54,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:15:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:15:54,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455477743] [2020-10-28 09:15:54,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:15:54,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:15:54,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009627624] [2020-10-28 09:15:54,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:15:54,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:15:54,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:15:54,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:15:54,342 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 22 states. [2020-10-28 09:15:54,894 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 09:15:55,074 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-28 09:15:55,433 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-28 09:15:55,640 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-28 09:15:56,051 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-28 09:15:56,260 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-28 09:15:56,495 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-28 09:15:56,788 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-10-28 09:15:56,948 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-28 09:15:57,140 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-28 09:15:57,338 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-28 09:15:57,536 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-10-28 09:15:57,747 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-28 09:15:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:15:58,431 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-28 09:15:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:15:58,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-28 09:15:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:15:58,438 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:15:58,438 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:15:58,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=402, Invalid=1950, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 09:15:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:15:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-10-28 09:15:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:15:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-28 09:15:58,456 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 42 [2020-10-28 09:15:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:15:58,456 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-28 09:15:58,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:15:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-28 09:15:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:15:58,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:15:58,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:15:58,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:15:58,458 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:15:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:15:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash -45011910, now seen corresponding path program 2 times [2020-10-28 09:15:58,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:15:58,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196445633] [2020-10-28 09:15:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:15:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:15:58,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:15:58,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:03,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:16:03,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:16:03,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:16:03,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:03,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:16:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:16:03,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:03,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:03,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:03,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:03,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:03,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:03,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:03,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:03,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:03,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:03,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:03,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:03,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:03,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:03,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:03,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:03,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:16:03,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196445633] [2020-10-28 09:16:03,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:03,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:16:03,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300662759] [2020-10-28 09:16:03,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:16:03,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:16:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:16:03,589 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 8 states. [2020-10-28 09:16:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:03,947 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-10-28 09:16:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:16:03,948 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-28 09:16:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:03,950 INFO L225 Difference]: With dead ends: 126 [2020-10-28 09:16:03,950 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:16:03,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:16:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:16:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-28 09:16:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:16:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-28 09:16:03,966 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 44 [2020-10-28 09:16:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:03,966 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-28 09:16:03,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:16:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-28 09:16:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:16:03,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:03,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:03,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:16:03,968 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:03,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1973604052, now seen corresponding path program 3 times [2020-10-28 09:16:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:03,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731478382] [2020-10-28 09:16:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:03,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:04,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:05,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:05,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:05,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:08,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:08,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:16:08,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:16:08,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:16:08,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:08,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:16:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:16:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:09,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:09,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:09,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:09,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:09,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:09,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:09,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:09,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:09,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:09,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:09,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 09:16:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731478382] [2020-10-28 09:16:09,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:09,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:16:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148020641] [2020-10-28 09:16:09,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:16:09,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:16:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:16:09,114 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 8 states. [2020-10-28 09:16:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:09,439 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-28 09:16:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:16:09,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-10-28 09:16:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:09,441 INFO L225 Difference]: With dead ends: 66 [2020-10-28 09:16:09,445 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:16:09,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:16:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:16:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 09:16:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:16:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-28 09:16:09,467 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 50 [2020-10-28 09:16:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:09,467 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-28 09:16:09,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:16:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-28 09:16:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:16:09,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:09,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:09,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:16:09,477 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1102906416, now seen corresponding path program 4 times [2020-10-28 09:16:09,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:09,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693762309] [2020-10-28 09:16:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:09,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:10,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:11,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:12,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:14,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:14,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:16:14,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:16:14,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5373 [2020-10-28 09:16:14,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:14,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:16:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:16:14,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:15,973 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-28 09:16:16,099 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-28 09:16:16,250 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 09:16:16,417 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-28 09:16:16,602 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-28 09:16:16,798 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-28 09:16:16,960 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-28 09:16:17,224 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2020-10-28 09:16:17,380 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-28 09:16:17,584 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-28 09:16:17,900 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-28 09:16:18,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:16:18,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:18,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:18,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:18,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:18,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:18,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:18,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:18,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:18,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:18,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:18,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:18,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:18,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:18,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:19,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693762309] [2020-10-28 09:16:19,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:19,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:16:19,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024680084] [2020-10-28 09:16:19,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:16:19,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:19,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:16:19,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:16:19,022 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 34 states. [2020-10-28 09:16:19,616 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-10-28 09:16:19,850 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2020-10-28 09:16:20,220 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-10-28 09:16:20,590 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 77 [2020-10-28 09:16:20,973 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 68 [2020-10-28 09:16:21,143 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-28 09:16:21,574 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 79 [2020-10-28 09:16:22,150 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 69 [2020-10-28 09:16:22,421 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 62 [2020-10-28 09:16:22,784 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 68 [2020-10-28 09:16:23,137 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 66 [2020-10-28 09:16:23,467 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 65 [2020-10-28 09:16:23,904 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 87 [2020-10-28 09:16:24,446 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 75 [2020-10-28 09:16:24,994 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 71 [2020-10-28 09:16:25,219 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-28 09:16:25,610 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 69 [2020-10-28 09:16:25,899 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-10-28 09:16:26,403 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 75 [2020-10-28 09:16:26,877 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2020-10-28 09:16:27,101 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 79 [2020-10-28 09:16:27,361 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-28 09:16:27,564 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2020-10-28 09:16:27,799 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2020-10-28 09:16:28,021 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-28 09:16:28,279 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-28 09:16:28,443 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 09:16:28,656 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-28 09:16:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:29,151 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-28 09:16:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:16:29,153 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 54 [2020-10-28 09:16:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:29,154 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:16:29,154 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:16:29,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=694, Invalid=3862, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 09:16:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:16:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-10-28 09:16:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:16:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-28 09:16:29,174 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2020-10-28 09:16:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:29,174 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-28 09:16:29,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:16:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-28 09:16:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:16:29,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:29,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:29,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:16:29,176 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2136546578, now seen corresponding path program 5 times [2020-10-28 09:16:29,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:29,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608278078] [2020-10-28 09:16:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:29,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:34,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:34,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:16:34,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:16:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:16:34,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:34,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:16:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:16:34,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:34,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:34,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:34,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:34,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:34,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:34,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:34,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:34,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:34,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:34,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:34,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:34,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:34,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:34,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:34,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:34,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:16:34,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608278078] [2020-10-28 09:16:34,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:34,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:16:34,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231805444] [2020-10-28 09:16:34,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:16:34,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:34,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:16:34,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:16:34,360 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 10 states. [2020-10-28 09:16:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:34,763 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2020-10-28 09:16:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:16:34,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-28 09:16:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:34,765 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:16:34,765 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 09:16:34,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:16:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 09:16:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-28 09:16:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:16:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-28 09:16:34,787 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 56 [2020-10-28 09:16:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:34,787 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-28 09:16:34,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:16:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-28 09:16:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:16:34,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:34,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:34,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:16:34,789 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:34,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1203093052, now seen corresponding path program 6 times [2020-10-28 09:16:34,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:34,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155267392] [2020-10-28 09:16:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:34,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:35,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:37,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:40,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:40,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:16:40,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:16:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5347 [2020-10-28 09:16:40,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:40,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 09:16:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:16:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:40,829 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-28 09:16:41,203 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-28 09:16:41,365 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-28 09:16:41,540 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-28 09:16:41,705 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-28 09:16:41,931 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-28 09:16:42,157 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-10-28 09:16:42,374 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-28 09:16:42,594 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-28 09:16:42,851 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2020-10-28 09:16:43,073 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-28 09:16:43,302 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2020-10-28 09:16:43,762 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2020-10-28 09:16:44,143 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-28 09:16:44,430 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-28 09:16:44,695 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-28 09:16:45,036 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2020-10-28 09:16:45,339 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-10-28 09:16:45,669 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2020-10-28 09:16:45,905 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-28 09:16:46,190 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-28 09:16:46,531 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-28 09:16:46,862 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-28 09:16:47,221 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-28 09:16:48,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:48,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:48,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:48,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:48,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:48,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155267392] [2020-10-28 09:16:48,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:48,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 09:16:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288488854] [2020-10-28 09:16:48,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 09:16:48,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 09:16:48,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:16:48,393 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 46 states. [2020-10-28 09:16:49,482 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-28 09:16:49,785 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-28 09:16:49,973 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 09:16:50,237 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 09:16:50,463 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-28 09:16:50,728 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-28 09:16:50,998 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-28 09:16:51,307 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-28 09:16:51,641 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2020-10-28 09:16:51,965 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-28 09:16:52,247 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-28 09:16:52,511 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-28 09:16:53,030 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 89 [2020-10-28 09:16:53,362 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-28 09:16:53,609 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-28 09:16:53,796 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 09:16:54,114 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 77 [2020-10-28 09:16:54,671 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 80 [2020-10-28 09:16:55,408 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 84 [2020-10-28 09:16:55,677 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-28 09:16:56,332 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 98 [2020-10-28 09:16:56,593 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-28 09:16:57,141 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 85 [2020-10-28 09:16:57,437 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-28 09:16:57,939 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 82 [2020-10-28 09:16:58,772 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 89 [2020-10-28 09:16:59,206 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 75 [2020-10-28 09:17:00,021 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 91 [2020-10-28 09:17:00,583 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 105 [2020-10-28 09:17:01,375 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 120 [2020-10-28 09:17:02,025 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 91 [2020-10-28 09:17:02,589 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 92 [2020-10-28 09:17:03,105 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 85 [2020-10-28 09:17:04,175 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 93 [2020-10-28 09:17:04,671 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2020-10-28 09:17:05,235 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 94 [2020-10-28 09:17:05,483 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-28 09:17:05,754 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-28 09:17:06,665 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 97 [2020-10-28 09:17:07,459 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 96 [2020-10-28 09:17:07,764 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-10-28 09:17:08,543 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 105 [2020-10-28 09:17:09,225 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 94 [2020-10-28 09:17:09,738 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 81 [2020-10-28 09:17:10,496 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2020-10-28 09:17:10,776 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-28 09:17:11,911 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 123 [2020-10-28 09:17:12,166 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-28 09:17:12,704 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 86 [2020-10-28 09:17:13,025 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-28 09:17:13,440 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 68 [2020-10-28 09:17:14,417 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 121 [2020-10-28 09:17:15,722 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 111 [2020-10-28 09:17:16,487 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2020-10-28 09:17:17,073 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2020-10-28 09:17:17,827 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 75 [2020-10-28 09:17:18,507 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 76 [2020-10-28 09:17:18,869 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2020-10-28 09:17:19,347 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 71 [2020-10-28 09:17:20,469 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 103 [2020-10-28 09:17:21,605 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 124 [2020-10-28 09:17:22,781 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 122 [2020-10-28 09:17:23,852 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 113 [2020-10-28 09:17:24,876 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 109 [2020-10-28 09:17:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:25,119 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2020-10-28 09:17:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-28 09:17:25,121 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2020-10-28 09:17:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:25,125 INFO L225 Difference]: With dead ends: 153 [2020-10-28 09:17:25,125 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:17:25,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4709 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=1738, Invalid=13762, Unknown=0, NotChecked=0, Total=15500 [2020-10-28 09:17:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:17:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 96. [2020-10-28 09:17:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:17:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-28 09:17:25,164 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 66 [2020-10-28 09:17:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:25,166 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-28 09:17:25,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 09:17:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-28 09:17:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:17:25,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:25,168 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:25,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:17:25,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash 368344034, now seen corresponding path program 7 times [2020-10-28 09:17:25,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:25,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558953491] [2020-10-28 09:17:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:25,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:25,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:30,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:17:30,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:17:30,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:17:30,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:30,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:17:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:17:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:30,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:30,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:30,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:30,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:17:30,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:30,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:30,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:30,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:30,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:30,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:30,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:30,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:30,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:30,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:17:30,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558953491] [2020-10-28 09:17:30,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:30,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:17:30,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794753946] [2020-10-28 09:17:30,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:17:30,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:30,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:17:30,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:17:30,403 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 12 states. [2020-10-28 09:17:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:31,068 INFO L93 Difference]: Finished difference Result 218 states and 242 transitions. [2020-10-28 09:17:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:17:31,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-28 09:17:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:31,071 INFO L225 Difference]: With dead ends: 218 [2020-10-28 09:17:31,071 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:17:31,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:17:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:17:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-10-28 09:17:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 09:17:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-28 09:17:31,098 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 68 [2020-10-28 09:17:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:31,098 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-28 09:17:31,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:17:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-28 09:17:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:17:31,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:31,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:31,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:17:31,100 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash 540219584, now seen corresponding path program 8 times [2020-10-28 09:17:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:31,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828798782] [2020-10-28 09:17:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:31,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:31,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:31,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:36,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:36,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:17:36,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:17:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:17:36,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:36,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:17:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:17:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:36,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:36,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:36,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:36,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:36,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:36,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:17:36,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:36,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:36,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:36,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:36,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:36,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:36,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:36,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:36,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:36,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-28 09:17:36,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828798782] [2020-10-28 09:17:36,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:36,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:17:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192392560] [2020-10-28 09:17:36,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:17:36,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:17:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:17:36,330 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 12 states. [2020-10-28 09:17:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:37,059 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-28 09:17:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:17:37,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-28 09:17:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:37,062 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:17:37,063 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 09:17:37,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:17:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 09:17:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 09:17:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:17:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-28 09:17:37,093 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 70 [2020-10-28 09:17:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:37,094 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-28 09:17:37,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:17:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-28 09:17:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:17:37,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:37,105 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:37,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:17:37,106 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2000488888, now seen corresponding path program 9 times [2020-10-28 09:17:37,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:37,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621371590] [2020-10-28 09:17:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:42,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:42,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:17:42,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:17:42,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:17:42,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:42,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:42,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 09:17:42,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:42,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:17:42,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:42,814 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-28 09:17:42,950 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-28 09:17:43,081 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-28 09:17:43,219 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-28 09:17:43,369 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-28 09:17:43,498 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 09:17:43,660 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-28 09:17:43,846 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-28 09:17:44,001 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 09:17:44,235 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-28 09:17:44,454 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-28 09:17:44,756 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-28 09:17:45,005 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2020-10-28 09:17:45,300 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-28 09:17:45,566 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-28 09:17:45,860 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-28 09:17:46,122 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-28 09:17:46,493 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2020-10-28 09:17:46,859 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 86 [2020-10-28 09:17:47,219 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 88 [2020-10-28 09:17:47,575 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 88 [2020-10-28 09:17:47,976 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 91 [2020-10-28 09:17:48,402 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 91 [2020-10-28 09:17:48,782 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 95 [2020-10-28 09:17:49,113 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-10-28 09:17:49,532 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-10-28 09:17:49,935 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2020-10-28 09:17:50,481 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 92 [2020-10-28 09:17:50,961 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 87 [2020-10-28 09:17:51,603 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 92 [2020-10-28 09:17:52,054 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 85 [2020-10-28 09:17:52,556 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2020-10-28 09:17:52,990 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2020-10-28 09:17:53,482 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2020-10-28 09:17:53,816 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-28 09:17:54,309 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2020-10-28 09:17:54,650 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-28 09:17:55,088 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-28 09:17:55,402 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-28 09:17:55,708 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-28 09:17:55,989 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-28 09:17:56,313 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-28 09:17:58,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:58,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:58,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:58,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:58,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:58,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:58,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:58,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:58,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:58,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:58,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:58,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:58,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:58,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:58,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:58,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:58,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:58,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:58,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 7 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:17:58,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621371590] [2020-10-28 09:17:58,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:58,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 09:17:58,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243068476] [2020-10-28 09:17:58,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 09:17:58,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:58,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 09:17:58,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:17:58,662 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 57 states. [2020-10-28 09:17:59,507 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-28 09:17:59,988 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-28 09:18:00,471 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-28 09:18:00,934 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-10-28 09:18:01,410 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-28 09:18:02,119 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 113 [2020-10-28 09:18:02,451 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-28 09:18:02,738 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-28 09:18:03,115 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-28 09:18:03,432 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-28 09:18:03,823 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-28 09:18:04,149 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-28 09:18:04,570 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-28 09:18:05,168 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-28 09:18:06,111 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 112 [2020-10-28 09:18:06,682 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2020-10-28 09:18:07,132 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2020-10-28 09:18:07,702 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2020-10-28 09:18:08,231 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 78 [2020-10-28 09:18:08,737 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-10-28 09:18:09,262 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 78 [2020-10-28 09:18:09,787 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2020-10-28 09:18:10,666 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 92 [2020-10-28 09:18:11,839 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 98 [2020-10-28 09:18:13,141 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 109 [2020-10-28 09:18:13,788 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 93 [2020-10-28 09:18:14,879 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 117 [2020-10-28 09:18:15,799 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 142 [2020-10-28 09:18:16,796 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 132 [2020-10-28 09:18:17,501 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 114 [2020-10-28 09:18:18,800 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 143 [2020-10-28 09:18:19,060 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 09:18:19,998 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 128 [2020-10-28 09:18:21,100 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 139 [2020-10-28 09:18:21,940 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 114 [2020-10-28 09:18:22,218 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-28 09:18:22,731 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-28 09:18:23,213 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 72 [2020-10-28 09:18:23,656 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-28 09:18:24,259 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-28 09:18:24,618 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 09:18:24,940 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-28 09:18:26,433 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-28 09:18:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:27,001 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2020-10-28 09:18:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-28 09:18:27,002 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 78 [2020-10-28 09:18:27,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:27,003 INFO L225 Difference]: With dead ends: 121 [2020-10-28 09:18:27,004 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:18:27,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=1120, Invalid=10870, Unknown=0, NotChecked=0, Total=11990 [2020-10-28 09:18:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:18:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-10-28 09:18:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 09:18:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2020-10-28 09:18:27,027 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 78 [2020-10-28 09:18:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:27,028 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2020-10-28 09:18:27,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 09:18:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2020-10-28 09:18:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:18:27,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:27,029 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:27,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:18:27,029 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1844328682, now seen corresponding path program 10 times [2020-10-28 09:18:27,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:27,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942530866] [2020-10-28 09:18:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:27,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:18:32,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:32,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:18:32,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:32,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:32,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:18:32,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:32,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:32,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:32,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:32,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:18:32,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:32,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:32,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:32,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:32,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:32,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 09:18:32,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942530866] [2020-10-28 09:18:32,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:32,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:18:32,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137437789] [2020-10-28 09:18:32,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:18:32,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:32,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:18:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:18:32,383 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand 14 states. [2020-10-28 09:18:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:33,697 INFO L93 Difference]: Finished difference Result 228 states and 249 transitions. [2020-10-28 09:18:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:18:33,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-28 09:18:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:33,701 INFO L225 Difference]: With dead ends: 228 [2020-10-28 09:18:33,701 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 09:18:33,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:18:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 09:18:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 109. [2020-10-28 09:18:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 09:18:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-28 09:18:33,751 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 80 [2020-10-28 09:18:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:33,752 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-28 09:18:33,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:18:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-28 09:18:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 09:18:33,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:33,754 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:33,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:18:33,754 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash -188672622, now seen corresponding path program 11 times [2020-10-28 09:18:33,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:33,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144901796] [2020-10-28 09:18:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:33,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:35,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:38,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:18:38,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:18:38,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:18:38,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:38,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:38,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:38,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:38,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:18:38,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:39,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:39,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:39,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:39,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:39,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:18:39,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:39,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:39,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:39,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:39,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:39,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:39,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:39,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:39,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:39,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:39,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:39,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:39,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:39,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:39,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:39,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:39,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 09:18:39,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144901796] [2020-10-28 09:18:39,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:39,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:18:39,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546440046] [2020-10-28 09:18:39,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:18:39,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:39,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:18:39,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:18:39,104 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 14 states. [2020-10-28 09:18:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:40,582 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2020-10-28 09:18:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:18:40,583 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 84 [2020-10-28 09:18:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:40,584 INFO L225 Difference]: With dead ends: 118 [2020-10-28 09:18:40,584 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 09:18:40,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:18:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 09:18:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 09:18:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 09:18:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-28 09:18:40,607 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 84 [2020-10-28 09:18:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:40,608 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-28 09:18:40,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:18:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-28 09:18:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:18:40,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:40,609 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:40,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:18:40,609 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:40,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1510757292, now seen corresponding path program 12 times [2020-10-28 09:18:40,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:40,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566026514] [2020-10-28 09:18:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:40,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:45,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:45,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 09:18:45,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:18:45,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:18:45,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:45,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-28 09:18:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 09:18:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:46,692 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-28 09:18:46,837 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-28 09:18:47,065 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-28 09:18:47,254 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-28 09:18:47,469 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-28 09:18:47,676 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-28 09:18:47,943 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-28 09:18:48,172 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-28 09:18:48,416 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-28 09:18:48,674 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-28 09:18:48,943 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-28 09:18:49,246 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-28 09:18:49,579 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-28 09:18:49,894 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-28 09:18:50,242 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-28 09:18:50,575 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-28 09:18:50,989 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2020-10-28 09:18:51,368 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2020-10-28 09:18:51,821 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2020-10-28 09:18:52,372 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 88 [2020-10-28 09:18:52,918 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-10-28 09:18:53,380 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 82 [2020-10-28 09:18:54,113 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 96 [2020-10-28 09:18:54,784 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 101 [2020-10-28 09:18:55,457 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 100 [2020-10-28 09:18:56,204 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 102 [2020-10-28 09:18:57,050 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 103 [2020-10-28 09:18:57,889 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 105 [2020-10-28 09:18:58,750 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 105 [2020-10-28 09:18:59,624 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 105 [2020-10-28 09:19:00,546 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 108 [2020-10-28 09:19:01,276 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 94 [2020-10-28 09:19:02,232 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 110 [2020-10-28 09:19:02,826 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-10-28 09:19:03,395 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 105 [2020-10-28 09:19:04,136 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 105 [2020-10-28 09:19:04,795 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 98 [2020-10-28 09:19:05,531 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 99 [2020-10-28 09:19:06,142 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 92 [2020-10-28 09:19:06,829 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 95 [2020-10-28 09:19:07,302 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-28 09:19:07,796 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-28 09:19:08,161 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-28 09:19:08,684 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-28 09:19:09,161 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-28 09:19:09,581 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-28 09:19:09,904 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-28 09:19:10,299 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-28 09:19:10,735 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-28 09:19:11,164 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-28 09:19:11,513 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-28 09:19:11,940 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-28 09:19:12,513 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-28 09:19:15,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:15,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:15,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:15,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:15,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:15,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:15,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:15,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:15,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:15,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:15,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:15,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:15,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 9 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:15,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566026514] [2020-10-28 09:19:15,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:15,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-28 09:19:15,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722522141] [2020-10-28 09:19:15,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-28 09:19:15,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:15,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-28 09:19:15,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=4257, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 09:19:15,641 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 69 states. [2020-10-28 09:19:16,900 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-10-28 09:19:17,546 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2020-10-28 09:19:18,280 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2020-10-28 09:19:19,059 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56