/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:35:15,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:35:15,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:35:15,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:35:15,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:35:15,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:35:15,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:35:15,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:35:15,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:35:15,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:35:15,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:35:15,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:35:15,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:35:15,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:35:15,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:35:15,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:35:15,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:35:15,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:35:15,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:35:15,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:35:15,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:35:15,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:35:15,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:35:15,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:35:15,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:35:15,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:35:15,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:35:15,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:35:15,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:35:15,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:35:15,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:35:15,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:35:15,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:35:15,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:35:15,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:35:15,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:35:15,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:35:15,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:35:15,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:35:15,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:35:15,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:35:15,779 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 [2020-10-27 20:35:15,840 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:35:15,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:35:15,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:35:15,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:35:15,848 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:35:15,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:35:15,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:35:15,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:35:15,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:35:15,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:35:15,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:35:15,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:35:15,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:35:15,851 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:35:15,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:35:15,851 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:35:15,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:35:15,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:35:15,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:35:15,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:35:15,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:35:15,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:35:15,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:35:15,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:35:15,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:35:15,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:35:15,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:35:15,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:35:15,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:35:15,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:35:16,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:35:16,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:35:16,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:35:16,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:35:16,326 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:35:16,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2020-10-27 20:35:16,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1522533d9/1248aedc9c324519a1367230ab57f55b/FLAGf72922bb4 [2020-10-27 20:35:17,194 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:35:17,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/linear_search.c [2020-10-27 20:35:17,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1522533d9/1248aedc9c324519a1367230ab57f55b/FLAGf72922bb4 [2020-10-27 20:35:17,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1522533d9/1248aedc9c324519a1367230ab57f55b [2020-10-27 20:35:17,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:35:17,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:35:17,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:17,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:35:17,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:35:17,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5126e57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17, skipping insertion in model container [2020-10-27 20:35:17,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:35:17,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:35:17,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:17,817 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:35:17,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:35:17,888 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:35:17,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17 WrapperNode [2020-10-27 20:35:17,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:35:17,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:35:17,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:35:17,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:35:17,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (1/1) ... [2020-10-27 20:35:17,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:35:17,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:35:17,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:35:17,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:35:17,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (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 [2020-10-27 20:35:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:35:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:35:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:35:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:35:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2020-10-27 20:35:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:35:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:35:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:35:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:35:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:35:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:35:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:35:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 20:35:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2020-10-27 20:35:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:35:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:35:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:35:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:35:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:35:18,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:35:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:35:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:35:18,412 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:35:18,412 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:35:18,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:18 BoogieIcfgContainer [2020-10-27 20:35:18,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:35:18,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:35:18,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:35:18,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:35:18,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:35:17" (1/3) ... [2020-10-27 20:35:18,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c0b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:18, skipping insertion in model container [2020-10-27 20:35:18,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:35:17" (2/3) ... [2020-10-27 20:35:18,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c0b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:35:18, skipping insertion in model container [2020-10-27 20:35:18,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:35:18" (3/3) ... [2020-10-27 20:35:18,426 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_search.c [2020-10-27 20:35:18,492 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:35:18,514 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:35:18,530 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:35:18,559 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:35:18,560 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:35:18,560 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:35:18,560 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:35:18,560 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:35:18,560 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:35:18,560 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:35:18,561 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:35:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 20:35:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:35:18,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:18,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:18,601 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:18,620 INFO L82 PathProgramCache]: Analyzing trace with hash 95069252, now seen corresponding path program 1 times [2020-10-27 20:35:18,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:18,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072275672] [2020-10-27 20:35:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:18,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:35:19,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:19,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-27 20:35:19,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:19,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:35:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:19,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:35:19,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:19,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:19,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:35:19,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:19,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:19,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:19,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:20,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:20,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 20:35:20,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:20,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:35:20,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 20:35:20,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:20,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:20,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072275672] [2020-10-27 20:35:20,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:20,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:35:20,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866379582] [2020-10-27 20:35:20,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:35:20,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:20,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:35:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:35:20,076 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-27 20:35:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:20,219 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-27 20:35:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:35:20,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-27 20:35:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:20,230 INFO L225 Difference]: With dead ends: 50 [2020-10-27 20:35:20,230 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:35:20,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:35:20,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:35:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 20:35:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:35:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 20:35:20,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-10-27 20:35:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:20,280 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 20:35:20,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:35:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 20:35:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:20,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:20,282 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] [2020-10-27 20:35:20,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:35:20,283 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1952588911, now seen corresponding path program 1 times [2020-10-27 20:35:20,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:20,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260442807] [2020-10-27 20:35:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:20,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:20,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:35:20,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:20,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-27 20:35:20,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:20,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:20,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:35:20,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 20:35:20,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:20,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:20,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:20,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:20,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:20,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:20,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:20,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:21,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:21,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:35:21,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 20:35:21,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:21,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:21,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:21,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:21,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260442807] [2020-10-27 20:35:21,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:21,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:35:21,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483187876] [2020-10-27 20:35:21,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:21,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:21,311 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-10-27 20:35:21,562 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 20:35:21,756 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 20:35:22,004 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-27 20:35:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:22,154 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-27 20:35:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:35:22,155 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:35:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:22,159 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:35:22,159 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:35:22,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:35:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:35:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-27 20:35:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:35:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-27 20:35:22,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 21 [2020-10-27 20:35:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:22,172 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-27 20:35:22,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-27 20:35:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:22,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:22,173 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] [2020-10-27 20:35:22,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:35:22,174 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:22,174 INFO L82 PathProgramCache]: Analyzing trace with hash -145134448, now seen corresponding path program 1 times [2020-10-27 20:35:22,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:22,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278768747] [2020-10-27 20:35:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:22,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:22,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:35:22,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:22,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 20:35:22,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:22,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:22,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:35:22,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:22,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:22,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:22,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:22,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:22,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:22,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:22,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:22,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:22,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:22,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:22,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:22,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:22,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:22,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:35:22,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:22,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 20:35:22,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:22,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:35:22,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:22,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278768747] [2020-10-27 20:35:22,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:22,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:35:22,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6576210] [2020-10-27 20:35:22,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:22,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:22,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:22,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:22,517 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-10-27 20:35:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:22,770 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-27 20:35:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:22,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:35:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:22,771 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:35:22,772 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:35:22,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:35:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:35:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 20:35:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:35:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 20:35:22,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-10-27 20:35:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:22,780 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 20:35:22,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 20:35:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:35:22,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:22,781 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] [2020-10-27 20:35:22,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:35:22,782 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1251524333, now seen corresponding path program 1 times [2020-10-27 20:35:22,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:22,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247732177] [2020-10-27 20:35:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:23,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:35:23,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:35:23,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-27 20:35:23,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:23,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:23,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:23,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:35:23,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:23,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:23,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:23,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:23,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:23,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:23,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:23,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:23,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:23,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 20:35:23,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:23,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 20:35:23,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:23,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:23,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:23,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:23,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:23,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247732177] [2020-10-27 20:35:23,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:23,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 20:35:23,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806476156] [2020-10-27 20:35:23,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:23,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:23,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:23,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:23,762 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2020-10-27 20:35:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:24,371 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-27 20:35:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:35:24,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:35:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:24,373 INFO L225 Difference]: With dead ends: 44 [2020-10-27 20:35:24,373 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 20:35:24,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:35:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 20:35:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 20:35:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:35:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 20:35:24,393 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-27 20:35:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:24,393 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 20:35:24,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 20:35:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:35:24,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:24,395 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] [2020-10-27 20:35:24,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:35:24,395 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash -719289417, now seen corresponding path program 1 times [2020-10-27 20:35:24,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:24,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801684455] [2020-10-27 20:35:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:24,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:35:25,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-27 20:35:25,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:35:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:35:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:25,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:25,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:25,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:25,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:35:25,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:25,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 20:35:25,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:25,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 20:35:25,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:35:25,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801684455] [2020-10-27 20:35:25,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:25,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:35:25,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565711191] [2020-10-27 20:35:25,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:35:25,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:25,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:35:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:25,340 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-27 20:35:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:25,523 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-27 20:35:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:35:25,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-27 20:35:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:25,525 INFO L225 Difference]: With dead ends: 46 [2020-10-27 20:35:25,525 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:35:25,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:35:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-27 20:35:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:35:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 20:35:25,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-27 20:35:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:25,535 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 20:35:25,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:35:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 20:35:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:35:25,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:25,536 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:25,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:35:25,536 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash -18224839, now seen corresponding path program 1 times [2020-10-27 20:35:25,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:25,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130343392] [2020-10-27 20:35:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:35:25,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:25,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 20:35:25,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:25,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:35:25,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:35:25,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:25,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:25,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:25,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:25,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:25,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:35:25,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:25,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 20:35:25,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:35:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:25,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:35:25,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:25,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130343392] [2020-10-27 20:35:25,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:25,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 20:35:25,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119554361] [2020-10-27 20:35:25,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:35:25,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:25,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:35:25,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:25,863 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-10-27 20:35:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:26,072 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-27 20:35:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:35:26,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-27 20:35:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:26,076 INFO L225 Difference]: With dead ends: 49 [2020-10-27 20:35:26,077 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 20:35:26,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 20:35:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-10-27 20:35:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:35:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 20:35:26,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-27 20:35:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:26,095 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 20:35:26,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:35:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 20:35:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:35:26,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:26,098 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] [2020-10-27 20:35:26,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:35:26,098 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:26,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1306095431, now seen corresponding path program 1 times [2020-10-27 20:35:26,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:26,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42938031] [2020-10-27 20:35:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:26,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:35:26,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:35:26,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-27 20:35:26,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:35:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:35:26,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:26,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:26,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:26,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:26,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:26,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:26,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:26,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:26,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:26,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:35:26,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:26,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-27 20:35:26,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:26,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:26,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:26,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:35:26,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:35:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:35:26,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42938031] [2020-10-27 20:35:26,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:26,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:35:26,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520462760] [2020-10-27 20:35:26,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:26,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:26,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:26,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:26,905 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2020-10-27 20:35:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:27,345 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-27 20:35:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:27,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 20:35:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:27,347 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:35:27,347 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:35:27,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:35:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:35:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 20:35:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:35:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 20:35:27,362 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-27 20:35:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:27,364 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 20:35:27,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 20:35:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:35:27,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:27,366 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:27,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:35:27,367 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:27,367 INFO L82 PathProgramCache]: Analyzing trace with hash -605030853, now seen corresponding path program 1 times [2020-10-27 20:35:27,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:27,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476236033] [2020-10-27 20:35:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:27,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:27,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:28,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:28,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:35:28,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:28,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-27 20:35:28,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:35:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:28,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:35:28,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:28,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:28,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:28,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:28,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:28,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:28,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:28,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:28,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:28,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:28,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:28,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:28,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:28,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 20:35:28,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:28,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 20:35:28,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:28,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:35:28,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:35:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:28,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476236033] [2020-10-27 20:35:28,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:28,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:28,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627152216] [2020-10-27 20:35:28,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:28,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:28,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:28,499 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2020-10-27 20:35:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:29,259 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-27 20:35:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:35:29,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 20:35:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:29,260 INFO L225 Difference]: With dead ends: 56 [2020-10-27 20:35:29,261 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 20:35:29,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:35:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 20:35:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 20:35:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:35:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 20:35:29,268 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2020-10-27 20:35:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:29,269 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 20:35:29,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 20:35:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:35:29,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:29,270 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:29,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:35:29,270 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1706833311, now seen corresponding path program 1 times [2020-10-27 20:35:29,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:29,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482705785] [2020-10-27 20:35:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:29,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:29,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:29,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:35:29,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:29,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 20:35:29,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:29,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:35:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:35:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:29,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:29,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:29,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:29,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:29,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:29,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:29,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:29,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:29,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:29,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:29,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:29,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:35:29,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:29,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 20:35:29,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:35:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:35:29,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:29,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482705785] [2020-10-27 20:35:29,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:29,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:35:29,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929710453] [2020-10-27 20:35:29,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:35:29,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:29,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:35:29,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:35:29,643 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2020-10-27 20:35:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:29,915 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-27 20:35:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:35:29,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 20:35:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:29,917 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:35:29,917 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:35:29,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:35:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:35:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-27 20:35:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:35:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 20:35:29,926 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-27 20:35:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:29,926 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 20:35:29,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:35:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 20:35:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:35:29,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:29,927 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:29,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:35:29,928 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:29,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2001327971, now seen corresponding path program 2 times [2020-10-27 20:35:29,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:29,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242995415] [2020-10-27 20:35:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:29,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:30,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:31,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:35:31,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-27 20:35:31,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:35:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:31,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:35:31,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:31,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:31,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:31,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:31,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:31,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:31,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:31,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:31,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:31,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:31,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:31,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:31,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:32,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 20:35:32,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:32,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-27 20:35:32,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:32,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:35:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:35:32,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:32,802 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-27 20:35:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:32,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242995415] [2020-10-27 20:35:32,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:32,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:35:32,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17789729] [2020-10-27 20:35:32,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:35:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:35:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:35:32,992 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2020-10-27 20:35:33,596 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-27 20:35:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:34,225 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-27 20:35:34,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:35:34,225 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 20:35:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:34,226 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:35:34,226 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:35:34,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:35:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:35:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 20:35:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:35:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 20:35:34,235 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2020-10-27 20:35:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:34,236 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 20:35:34,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:35:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 20:35:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:35:34,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:34,237 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:34,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:35:34,238 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:34,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1173936009, now seen corresponding path program 2 times [2020-10-27 20:35:34,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:34,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319526280] [2020-10-27 20:35:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:34,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:34,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:35:34,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:34,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-27 20:35:34,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:35:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:35:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:34,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:34,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:34,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:34,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:34,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:35:34,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:34,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:34,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:34,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:34,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:34,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:34,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:34,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:35:34,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:34,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 20:35:34,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:35:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:34,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319526280] [2020-10-27 20:35:34,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:34,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:35:34,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942912012] [2020-10-27 20:35:34,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:34,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:34,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:34,788 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2020-10-27 20:35:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:35,124 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-27 20:35:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:35:35,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-27 20:35:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:35,127 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:35:35,127 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:35:35,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:35:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:35:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-27 20:35:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:35:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 20:35:35,136 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-27 20:35:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:35,137 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 20:35:35,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 20:35:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:35:35,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:35,138 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:35,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:35:35,138 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash 587129995, now seen corresponding path program 3 times [2020-10-27 20:35:35,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:35,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961859841] [2020-10-27 20:35:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:35,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:35:37,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:37,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1843 [2020-10-27 20:35:37,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:35:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:37,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:35:37,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:37,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:37,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:37,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:37,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:37,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:38,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:38,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:35:38,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:35:38,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-27 20:35:38,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:38,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:35:38,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:38,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:35:38,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961859841] [2020-10-27 20:35:38,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:38,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:35:38,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632505953] [2020-10-27 20:35:38,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:35:38,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:35:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:35:38,493 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2020-10-27 20:35:39,177 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-27 20:35:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:39,264 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-27 20:35:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:39,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 20:35:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:39,267 INFO L225 Difference]: With dead ends: 53 [2020-10-27 20:35:39,268 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 20:35:39,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:35:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 20:35:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-27 20:35:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 20:35:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-27 20:35:39,287 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 33 [2020-10-27 20:35:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:39,288 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-27 20:35:39,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:35:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-27 20:35:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:35:39,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:39,291 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:39,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:35:39,292 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:39,292 INFO L82 PathProgramCache]: Analyzing trace with hash -929886031, now seen corresponding path program 3 times [2020-10-27 20:35:39,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:39,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777302769] [2020-10-27 20:35:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:39,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:35:39,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:39,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-27 20:35:39,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:39,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:35:39,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:35:39,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:39,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:39,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:39,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:39,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:39,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:39,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:39,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:39,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:39,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:35:39,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:39,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 20:35:39,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:35:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:39,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777302769] [2020-10-27 20:35:39,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:39,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:39,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506427170] [2020-10-27 20:35:39,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:39,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:39,917 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2020-10-27 20:35:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:40,311 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-27 20:35:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:35:40,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-27 20:35:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:40,314 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:35:40,314 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 20:35:40,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:35:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 20:35:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-10-27 20:35:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:35:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-27 20:35:40,335 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2020-10-27 20:35:40,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:40,335 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-27 20:35:40,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-27 20:35:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 20:35:40,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:40,337 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:40,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:35:40,337 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1516692045, now seen corresponding path program 4 times [2020-10-27 20:35:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:40,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274217559] [2020-10-27 20:35:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:40,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:40,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:40,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:41,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:42,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:42,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:45,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:35:45,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:35:45,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:35:45,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:35:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:45,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:35:45,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:45,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:45,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:45,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:45,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:45,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:45,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:45,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:35:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:46,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:48,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:48,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:35:48,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:35:48,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2631 [2020-10-27 20:35:48,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:35:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:35:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:35:48,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:48,775 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-10-27 20:35:48,935 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-27 20:35:51,311 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 20:35:51,475 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 20:35:51,643 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 20:35:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:35:51,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274217559] [2020-10-27 20:35:51,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:51,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:35:51,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238770232] [2020-10-27 20:35:51,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:35:51,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:51,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:35:51,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=125, Unknown=1, NotChecked=0, Total=156 [2020-10-27 20:35:51,679 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 13 states. [2020-10-27 20:35:52,009 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-27 20:35:52,368 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-27 20:35:52,713 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2020-10-27 20:35:53,122 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 109 [2020-10-27 20:35:53,474 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2020-10-27 20:36:22,982 WARN L193 SmtUtils]: Spent 27.37 s on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-27 20:37:19,850 WARN L193 SmtUtils]: Spent 56.74 s on a formula simplification. DAG size of input: 141 DAG size of output: 121 [2020-10-27 20:37:34,970 WARN L193 SmtUtils]: Spent 15.02 s on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2020-10-27 20:37:37,213 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-27 20:37:39,574 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 20:37:39,946 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 20:37:44,373 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-27 20:37:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:44,636 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-27 20:37:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:37:44,636 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 20:37:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:44,637 INFO L225 Difference]: With dead ends: 73 [2020-10-27 20:37:44,637 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 20:37:44,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 111.4s TimeCoverageRelationStatistics Valid=148, Invalid=604, Unknown=4, NotChecked=0, Total=756 [2020-10-27 20:37:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 20:37:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 20:37:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 20:37:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 20:37:44,654 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2020-10-27 20:37:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:44,654 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 20:37:44,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:37:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 20:37:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:37:44,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:44,657 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:44,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:37:44,657 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1818462759, now seen corresponding path program 4 times [2020-10-27 20:37:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:44,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776764351] [2020-10-27 20:37:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:44,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:45,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:45,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:37:45,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:45,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-27 20:37:45,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:37:45,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:37:45,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:37:45,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:45,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:45,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:45,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:45,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:45,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:37:45,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:45,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:45,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:37:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:45,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:45,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:45,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:37:45,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 20:37:45,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:37:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:37:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:37:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:37:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776764351] [2020-10-27 20:37:45,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:45,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:37:45,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886746930] [2020-10-27 20:37:45,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:37:45,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:37:45,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:37:45,404 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 9 states. [2020-10-27 20:37:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:45,970 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-27 20:37:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:37:45,978 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-27 20:37:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:45,979 INFO L225 Difference]: With dead ends: 67 [2020-10-27 20:37:45,979 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:37:45,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:37:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:37:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-27 20:37:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:37:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 20:37:45,989 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-10-27 20:37:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:45,990 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 20:37:45,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:37:45,990 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 20:37:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:37:45,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:45,991 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:45,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:37:45,991 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:45,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1889698523, now seen corresponding path program 5 times [2020-10-27 20:37:45,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:45,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661785362] [2020-10-27 20:37:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:46,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:46,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:46,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:46,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:47,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:48,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:48,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 20:37:51,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:37:51,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:37:51,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:37:51,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:37:51,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:37:51,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:51,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:51,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:51,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:51,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:37:51,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:51,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:51,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 20:37:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:51,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:51,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:55,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:55,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:37:55,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:37:55,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4418 [2020-10-27 20:37:55,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:55,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:37:55,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 20:37:55,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 20:37:55,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0