/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/array-fpi/ms2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:38:57,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:38:57,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:38:57,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:38:57,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:38:57,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:38:57,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:38:57,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:38:57,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:38:57,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:38:57,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:38:57,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:38:57,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:38:57,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:38:57,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:38:57,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:38:57,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:38:57,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:38:57,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:38:57,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:38:57,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:38:57,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:38:57,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:38:57,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:38:57,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:38:57,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:38:57,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:38:57,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:38:57,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:38:57,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:38:57,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:38:57,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:38:57,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:38:57,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:38:57,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:38:57,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:38:57,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:38:57,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:38:57,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:38:57,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:38:57,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:38:57,944 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 14:38:57,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:38:57,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:38:58,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:38:58,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:38:58,004 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:38:58,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:38:58,005 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:38:58,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:38:58,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:38:58,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:38:58,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:38:58,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:38:58,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:38:58,007 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:38:58,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:38:58,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:38:58,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:38:58,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:38:58,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:38:58,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:38:58,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:38:58,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:38:58,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:38:58,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:38:58,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:38:58,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:38:58,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:38:58,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:38:58,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:38:58,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:38:58,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:38:58,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:38:58,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:38:58,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:38:58,505 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:38:58,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2.c [2020-10-27 14:38:58,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563d39a6a/ea4361782d804576b3d9bd22d81c81db/FLAG8b96f43f1 [2020-10-27 14:38:59,169 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:38:59,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms2.c [2020-10-27 14:38:59,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563d39a6a/ea4361782d804576b3d9bd22d81c81db/FLAG8b96f43f1 [2020-10-27 14:38:59,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563d39a6a/ea4361782d804576b3d9bd22d81c81db [2020-10-27 14:38:59,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:38:59,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:38:59,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:59,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:38:59,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:38:59,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:38:59,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d846b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59, skipping insertion in model container [2020-10-27 14:38:59,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:38:59,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:38:59,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:38:59,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:59,878 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:38:59,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:38:59,945 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:38:59,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59 WrapperNode [2020-10-27 14:38:59,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:38:59,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:38:59,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:38:59,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:38:59,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:38:59,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:38:59,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:38:59,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:39:00,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:39:00,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:39:00,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (1/1) ... [2020-10-27 14:39:00,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:39:00,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:39:00,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:39:00,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:39:00,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (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 14:39:00,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:39:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:39:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:39:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:39:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:39:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:39:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:39:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:39:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:39:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:39:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:39:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:39:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:39:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:39:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:39:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:39:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:39:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:39:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:39:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:39:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:39:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:39:00,629 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:39:00,629 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:39:00,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:39:00 BoogieIcfgContainer [2020-10-27 14:39:00,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:39:00,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:39:00,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:39:00,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:39:00,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:38:59" (1/3) ... [2020-10-27 14:39:00,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4381f0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:39:00, skipping insertion in model container [2020-10-27 14:39:00,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:38:59" (2/3) ... [2020-10-27 14:39:00,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4381f0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:39:00, skipping insertion in model container [2020-10-27 14:39:00,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:39:00" (3/3) ... [2020-10-27 14:39:00,641 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2.c [2020-10-27 14:39:00,653 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:39:00,661 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:39:00,677 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:39:00,703 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:39:00,704 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:39:00,704 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:39:00,704 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:39:00,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:39:00,704 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:39:00,704 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:39:00,704 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:39:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 14:39:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:39:00,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:00,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:00,730 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1361575079, now seen corresponding path program 1 times [2020-10-27 14:39:00,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:00,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463703365] [2020-10-27 14:39:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:00,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:39:01,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:01,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-27 14:39:01,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:01,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:01,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:01,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:39:01,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:01,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:01,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 14:39:01,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:01,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:01,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:01,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:01,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:01,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:01,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:01,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:39:01,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:01,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:01,633 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 14:39:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463703365] [2020-10-27 14:39:01,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:01,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:39:01,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849816682] [2020-10-27 14:39:01,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:39:01,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:39:01,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:39:01,668 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-27 14:39:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:01,805 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-27 14:39:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:39:01,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-27 14:39:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:01,816 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:39:01,816 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:39:01,820 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 14:39:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:39:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 14:39:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:39:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 14:39:01,867 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-10-27 14:39:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:01,868 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 14:39:01,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:39:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 14:39:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:39:01,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:01,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:01,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:39:01,871 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1173980304, now seen corresponding path program 1 times [2020-10-27 14:39:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:01,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086814916] [2020-10-27 14:39:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:01,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:01,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:02,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:39:02,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:39:02,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-27 14:39:02,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:39:02,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:39:02,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:39:02,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:02,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:02,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:02,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:02,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:02,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:39:02,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:02,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:02,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:02,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:02,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:02,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:02,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:02,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:02,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:02,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:39:02,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:39:02,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:02,309 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 14:39:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086814916] [2020-10-27 14:39:02,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:02,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:39:02,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636873551] [2020-10-27 14:39:02,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:39:02,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:39:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:39:02,314 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-27 14:39:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:02,594 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-27 14:39:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:39:02,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 14:39:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:02,597 INFO L225 Difference]: With dead ends: 39 [2020-10-27 14:39:02,597 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:39:02,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:39:02,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:39:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 14:39:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:39:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 14:39:02,614 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-27 14:39:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:02,615 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 14:39:02,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:39:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 14:39:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:39:02,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:02,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:02,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:39:02,619 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1619095335, now seen corresponding path program 1 times [2020-10-27 14:39:02,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:02,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110108744] [2020-10-27 14:39:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:02,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:39:03,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-27 14:39:03,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:39:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:39:03,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:39:03,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:03,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:03,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:03,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:03,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:03,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:03,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:03,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:03,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:03,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:03,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:03,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:03,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:39:03,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:03,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:03,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110108744] [2020-10-27 14:39:03,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:03,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 14:39:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209601769] [2020-10-27 14:39:03,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:39:03,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:03,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:39:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:39:03,703 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-27 14:39:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:04,071 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 14:39:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:39:04,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 14:39:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:04,073 INFO L225 Difference]: With dead ends: 38 [2020-10-27 14:39:04,073 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:39:04,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:39:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:39:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 14:39:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:39:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:39:04,081 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-27 14:39:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:04,082 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:39:04,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:39:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:39:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:39:04,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:04,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:04,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:39:04,083 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1995813591, now seen corresponding path program 1 times [2020-10-27 14:39:04,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:04,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220966753] [2020-10-27 14:39:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:04,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:04,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:39:04,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:39:04,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-27 14:39:04,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:04,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:39:04,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:39:04,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:39:04,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:04,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:04,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:04,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:39:04,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:04,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:04,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:04,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:04,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:04,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:04,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:04,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:04,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220966753] [2020-10-27 14:39:04,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:04,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:39:04,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715613827] [2020-10-27 14:39:04,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:39:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:39:04,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:39:04,897 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-27 14:39:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:05,028 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-27 14:39:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:39:05,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 14:39:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:05,030 INFO L225 Difference]: With dead ends: 44 [2020-10-27 14:39:05,030 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:39:05,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:39:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:39:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 14:39:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:39:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:39:05,039 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-27 14:39:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:05,039 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:39:05,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:39:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:39:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:39:05,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:05,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:05,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:39:05,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:05,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:05,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1207722736, now seen corresponding path program 1 times [2020-10-27 14:39:05,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:05,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441728442] [2020-10-27 14:39:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:05,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:05,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:08,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:39:08,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:39:08,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2965 [2020-10-27 14:39:08,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:39:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:39:08,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:08,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:08,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:08,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:08,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:08,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:08,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:08,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:08,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:08,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:08,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:08,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:08,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:08,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:08,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:08,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:08,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441728442] [2020-10-27 14:39:08,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:08,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:39:08,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343863004] [2020-10-27 14:39:08,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:39:08,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:08,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:39:08,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:39:08,667 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 15 states. [2020-10-27 14:39:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:09,777 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-27 14:39:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:39:09,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-27 14:39:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:09,782 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:39:09,782 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:39:09,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:39:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:39:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-27 14:39:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:39:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-27 14:39:09,795 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-10-27 14:39:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:09,796 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-27 14:39:09,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:39:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-27 14:39:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:39:09,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:09,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:09,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:39:09,798 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash 773864071, now seen corresponding path program 2 times [2020-10-27 14:39:09,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:09,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100143438] [2020-10-27 14:39:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:09,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:10,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:11,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:14,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:39:14,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:39:14,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4868 [2020-10-27 14:39:14,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:39:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:14,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:39:14,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:14,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:14,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:14,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:39:14,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:14,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:14,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:14,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:14,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:14,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:14,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:14,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:14,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:14,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:39:14,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100143438] [2020-10-27 14:39:14,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:14,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:39:14,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526024496] [2020-10-27 14:39:14,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:39:14,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:39:14,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:39:14,985 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2020-10-27 14:39:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:15,468 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-27 14:39:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:39:15,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 14:39:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:15,471 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:39:15,471 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:39:15,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:39:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:39:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-27 14:39:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:39:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-27 14:39:15,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-10-27 14:39:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:15,486 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-27 14:39:15,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:39:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-27 14:39:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:39:15,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:15,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:15,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:39:15,488 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:15,490 INFO L82 PathProgramCache]: Analyzing trace with hash -433053015, now seen corresponding path program 3 times [2020-10-27 14:39:15,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:15,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301879508] [2020-10-27 14:39:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:15,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:15,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:15,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:15,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:16,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:17,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:18,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:20,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:20,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:39:20,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:39:20,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4825 [2020-10-27 14:39:20,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:39:20,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:20,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:20,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:39:21,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:21,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:21,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:21,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:21,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:21,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:21,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:21,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:21,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:21,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:21,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:21,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:21,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:21,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:21,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:21,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:39:21,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301879508] [2020-10-27 14:39:21,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:21,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:39:21,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429283868] [2020-10-27 14:39:21,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:39:21,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:21,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:39:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:39:21,524 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 19 states. [2020-10-27 14:39:22,660 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 14:39:23,072 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-27 14:39:23,358 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-27 14:39:23,883 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 14:39:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:24,488 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-27 14:39:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:39:24,492 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-27 14:39:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:24,493 INFO L225 Difference]: With dead ends: 51 [2020-10-27 14:39:24,493 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:39:24,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:39:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:39:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-27 14:39:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:39:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:39:24,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 35 [2020-10-27 14:39:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:24,504 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:39:24,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:39:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:39:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:39:24,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:24,505 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:24,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:39:24,506 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1842075536, now seen corresponding path program 4 times [2020-10-27 14:39:24,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:24,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390686503] [2020-10-27 14:39:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:26,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:29,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:39:29,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:39:29,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:39:29,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:29,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:39:29,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:39:29,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:39:29,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:29,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:29,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:29,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:29,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:29,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:29,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:29,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:29,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:29,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:29,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:29,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:29,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:29,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:29,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:29,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:29,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:29,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:39:29,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390686503] [2020-10-27 14:39:29,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:39:29,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:39:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764128620] [2020-10-27 14:39:29,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:39:29,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:39:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:39:29,624 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 6 states. [2020-10-27 14:39:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:29,731 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-27 14:39:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:39:29,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-27 14:39:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:29,732 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:39:29,732 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:39:29,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:39:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:39:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 14:39:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:39:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 14:39:29,748 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2020-10-27 14:39:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:29,748 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 14:39:29,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:39:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 14:39:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:39:29,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:29,749 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1] [2020-10-27 14:39:29,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:39:29,750 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2100240974, now seen corresponding path program 5 times [2020-10-27 14:39:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:29,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164868681] [2020-10-27 14:39:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:29,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:29,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:32,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:34,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:34,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:39:34,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:39:34,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:39:34,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:39:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:39:34,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:35,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:35,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:35,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:39:35,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:35,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:35,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:35,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:35,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:35,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:35,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:35,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:35,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:35,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:35,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:39:35,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164868681] [2020-10-27 14:39:35,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:35,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:39:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882725157] [2020-10-27 14:39:35,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:39:35,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:35,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:39:35,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:39:35,058 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-10-27 14:39:35,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:35,685 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-27 14:39:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:39:35,686 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 14:39:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:35,688 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:39:35,688 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:39:35,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:39:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:39:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 14:39:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:39:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 14:39:35,697 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-27 14:39:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:35,698 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 14:39:35,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:39:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 14:39:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:39:35,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:35,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:35,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:39:35,699 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:35,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1797980308, now seen corresponding path program 6 times [2020-10-27 14:39:35,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:35,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893625145] [2020-10-27 14:39:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:35,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:35,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:36,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:36,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:37,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:40,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:40,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:39:40,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:39:40,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:39:40,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:39:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:39:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:39:40,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:41,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:41,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:41,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:41,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:41,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:41,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:39:41,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:41,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:41,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:41,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:41,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:41,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:41,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:41,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:41,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:41,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:41,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:41,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:41,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:41,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:41,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:41,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893625145] [2020-10-27 14:39:41,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:41,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:39:41,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867782365] [2020-10-27 14:39:41,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:39:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:41,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:39:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:39:41,104 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-27 14:39:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:41,836 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-27 14:39:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:39:41,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 14:39:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:41,837 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:39:41,838 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:39:41,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:39:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:39:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-27 14:39:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:39:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 14:39:41,847 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-27 14:39:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:41,847 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 14:39:41,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:39:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 14:39:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:39:41,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:41,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:41,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:39:41,849 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1517817098, now seen corresponding path program 7 times [2020-10-27 14:39:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:41,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184753942] [2020-10-27 14:39:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:41,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:42,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:43,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:46,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:46,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:39:46,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:39:46,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:39:46,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:39:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:39:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:39:46,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:47,281 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2020-10-27 14:39:47,467 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 30 [2020-10-27 14:39:47,666 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 35 [2020-10-27 14:39:47,809 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 14:39:48,183 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-27 14:39:48,448 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-27 14:39:48,661 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-27 14:39:48,821 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2020-10-27 14:39:49,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:39:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:49,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:39:49,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:49,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:39:49,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:49,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:49,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:49,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:49,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:49,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:39:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:49,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:49,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:49,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:39:49,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:39:49,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:39:49,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:49,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:39:49,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:39:49,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:39:49,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:39:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:39:49,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184753942] [2020-10-27 14:39:49,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:39:49,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:39:49,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876235316] [2020-10-27 14:39:49,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:39:49,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:39:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:39:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:39:49,606 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 23 states. [2020-10-27 14:39:50,094 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-27 14:39:51,107 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 178 [2020-10-27 14:39:51,320 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 14:39:51,542 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 14:39:51,754 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 14:39:52,117 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 14:39:52,887 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 14:39:53,343 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 14:39:53,853 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 14:39:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:39:53,932 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-27 14:39:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:39:53,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-27 14:39:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:39:53,934 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:39:53,935 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:39:53,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:39:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:39:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 14:39:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:39:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-27 14:39:53,947 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2020-10-27 14:39:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:39:53,947 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-27 14:39:53,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:39:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-27 14:39:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:39:53,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:39:53,948 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:39:53,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:39:53,949 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:39:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:39:53,950 INFO L82 PathProgramCache]: Analyzing trace with hash 974327885, now seen corresponding path program 8 times [2020-10-27 14:39:53,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:39:53,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658891749] [2020-10-27 14:39:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:39:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:39:53,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:54,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:55,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:56,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:39:58,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:39:58,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:39:58,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:39:58,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:39:58,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:39:58,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:39:58,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:39:58,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:39:58,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:00,166 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 19 [2020-10-27 14:40:00,337 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2020-10-27 14:40:00,619 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 30 [2020-10-27 14:40:00,963 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2020-10-27 14:40:01,402 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 39 [2020-10-27 14:40:01,914 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 46 [2020-10-27 14:40:02,550 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 56 [2020-10-27 14:40:04,142 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 192 DAG size of output: 88 [2020-10-27 14:40:09,837 WARN L193 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 167 DAG size of output: 80 [2020-10-27 14:40:15,478 WARN L193 SmtUtils]: Spent 5.47 s on a formula simplification. DAG size of input: 169 DAG size of output: 86 [2020-10-27 14:40:20,502 WARN L193 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 299 DAG size of output: 128 [2020-10-27 14:40:25,433 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 270 DAG size of output: 117 [2020-10-27 14:40:26,187 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 71 [2020-10-27 14:40:26,776 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 62 [2020-10-27 14:40:28,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:40:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:28,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:28,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:28,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:40:28,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:28,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:40:28,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:28,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:28,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:28,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:40:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:40:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:40:28,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:40:28,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:40:28,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:40:28,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:40:28,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:40:28,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:40:28,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:40:28,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:40:28,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:40:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:40:28,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658891749] [2020-10-27 14:40:28,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:40:28,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:40:28,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213161028] [2020-10-27 14:40:28,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:40:28,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:40:28,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:40:28,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:40:28,279 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 27 states. [2020-10-27 14:40:29,338 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 119 [2020-10-27 14:40:29,692 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-10-27 14:40:32,320 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 63 [2020-10-27 14:40:35,964 WARN L193 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2020-10-27 14:40:41,587 WARN L193 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 203 DAG size of output: 179 [2020-10-27 14:40:43,168 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 224 DAG size of output: 180 [2020-10-27 14:40:47,237 WARN L193 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 322 DAG size of output: 206 [2020-10-27 14:40:50,234 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 267 DAG size of output: 206 [2020-10-27 14:40:50,963 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 14:40:51,199 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 14:40:53,949 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 14:40:54,713 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 14:40:55,293 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 14:40:56,153 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 14:40:58,506 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 14:40:59,360 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 14:41:00,530 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 14:41:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:00,691 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-27 14:41:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:41:00,692 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-27 14:41:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:00,693 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:41:00,693 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 14:41:00,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 58.5s TimeCoverageRelationStatistics Valid=310, Invalid=2138, Unknown=2, NotChecked=0, Total=2450 [2020-10-27 14:41:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 14:41:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 14:41:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:41:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 14:41:00,712 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2020-10-27 14:41:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:00,713 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 14:41:00,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:41:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 14:41:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:41:00,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:00,715 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:00,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:41:00,716 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:00,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1913889322, now seen corresponding path program 9 times [2020-10-27 14:41:00,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:00,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970599926] [2020-10-27 14:41:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:00,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:00,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:01,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:02,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:03,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:04,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:05,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:41:05,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:06,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:06,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:06,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:06,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:41:06,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:06,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:06,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:06,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:06,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:06,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:06,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:06,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:06,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:06,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:06,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:06,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:06,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:41:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:41:06,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970599926] [2020-10-27 14:41:06,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:06,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:41:06,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060489301] [2020-10-27 14:41:06,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:41:06,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:41:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:41:06,403 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-10-27 14:41:07,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:07,952 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-27 14:41:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:41:07,953 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-27 14:41:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:07,954 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:41:07,954 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:41:07,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:41:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:41:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 14:41:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:41:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 14:41:07,974 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-27 14:41:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:07,975 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 14:41:07,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:41:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 14:41:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:41:07,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:07,978 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:07,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:41:07,978 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:07,980 INFO L82 PathProgramCache]: Analyzing trace with hash -527027768, now seen corresponding path program 10 times [2020-10-27 14:41:07,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:07,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708965300] [2020-10-27 14:41:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:08,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:08,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:10,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:11,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:12,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:41:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:13,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:13,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:13,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:13,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:13,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:13,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:13,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:13,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:13,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:13,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:13,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:13,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:13,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:13,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:41:13,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:13,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:13,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:13,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:13,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:41:13,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708965300] [2020-10-27 14:41:13,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:13,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:41:13,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541421777] [2020-10-27 14:41:13,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:41:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:41:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:41:13,914 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-27 14:41:15,124 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2020-10-27 14:41:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:41:16,031 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-27 14:41:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:41:16,033 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-27 14:41:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:41:16,034 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:41:16,034 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:41:16,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=431, Invalid=1549, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:41:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:41:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-27 14:41:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:41:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 14:41:16,049 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-27 14:41:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:41:16,049 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 14:41:16,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:41:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 14:41:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:41:16,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:41:16,051 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:41:16,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:41:16,051 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:41:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:41:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1196207642, now seen corresponding path program 11 times [2020-10-27 14:41:16,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:41:16,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784121383] [2020-10-27 14:41:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:41:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:16,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:16,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:17,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:18,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:21,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:41:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:22,336 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 19 [2020-10-27 14:41:22,517 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 29 [2020-10-27 14:41:22,846 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 29 [2020-10-27 14:41:23,458 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 40 [2020-10-27 14:41:24,282 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 44 [2020-10-27 14:41:25,717 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 259 DAG size of output: 78 [2020-10-27 14:41:27,154 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 208 DAG size of output: 80 [2020-10-27 14:41:28,861 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 296 DAG size of output: 78 [2020-10-27 14:41:30,778 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 265 DAG size of output: 94 [2020-10-27 14:41:31,953 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 141 DAG size of output: 81 [2020-10-27 14:41:32,693 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-27 14:41:33,445 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 90 [2020-10-27 14:41:36,019 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 220 DAG size of output: 171 [2020-10-27 14:41:38,072 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 218 DAG size of output: 148 [2020-10-27 14:41:40,523 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 204 DAG size of output: 101 [2020-10-27 14:41:41,780 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 178 DAG size of output: 77 [2020-10-27 14:41:42,686 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 74 [2020-10-27 14:41:43,533 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 67 [2020-10-27 14:41:44,431 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 50 [2020-10-27 14:41:44,788 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2020-10-27 14:41:45,212 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2020-10-27 14:41:45,540 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2020-10-27 14:41:46,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:41:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:46,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:46,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:41:46,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:41:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:46,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:41:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:41:46,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:41:46,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:41:46,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:41:46,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:41:46,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:41:46,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:41:46,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:41:46,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:41:46,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:41:46,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:41:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:41:46,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784121383] [2020-10-27 14:41:46,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:41:46,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:41:46,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579799878] [2020-10-27 14:41:46,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:41:46,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:41:46,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:41:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:41:46,704 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 31 states. [2020-10-27 14:41:51,730 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 346 DAG size of output: 192 [2020-10-27 14:41:53,003 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 64 [2020-10-27 14:41:54,618 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 197 DAG size of output: 79 [2020-10-27 14:42:15,174 WARN L193 SmtUtils]: Spent 20.08 s on a formula simplification. DAG size of input: 510 DAG size of output: 385 [2020-10-27 14:42:22,746 WARN L193 SmtUtils]: Spent 7.18 s on a formula simplification. DAG size of input: 381 DAG size of output: 245 [2020-10-27 14:42:32,307 WARN L193 SmtUtils]: Spent 9.11 s on a formula simplification. DAG size of input: 396 DAG size of output: 253 [2020-10-27 14:42:49,220 WARN L193 SmtUtils]: Spent 16.18 s on a formula simplification. DAG size of input: 462 DAG size of output: 312