/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:56:21,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:56:21,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:56:22,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:56:22,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:56:22,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:56:22,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:56:22,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:56:22,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:56:22,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:56:22,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:56:22,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:56:22,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:56:22,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:56:22,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:56:22,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:56:22,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:56:22,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:56:22,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:56:22,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:56:22,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:56:22,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:56:22,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:56:22,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:56:22,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:56:22,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:56:22,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:56:22,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:56:22,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:56:22,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:56:22,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:56:22,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:56:22,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:56:22,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:56:22,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:56:22,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:56:22,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:56:22,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:56:22,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:56:22,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:56:22,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:56:22,123 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 01:56:22,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:56:22,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:56:22,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:56:22,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:56:22,173 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:56:22,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:56:22,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:56:22,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:56:22,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:56:22,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:56:22,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:56:22,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:56:22,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:56:22,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:56:22,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:56:22,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:56:22,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:56:22,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:56:22,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:56:22,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:56:22,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:56:22,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:56:22,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:56:22,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:56:22,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:56:22,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:56:22,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:56:22,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:56:22,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:56:22,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:56:22,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:56:22,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:56:22,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:56:22,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:56:22,603 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:56:22,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2020-10-27 01:56:22,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e13e57ec/b0c22d19285a49269cfaadbc5936190c/FLAG02a0d59ee [2020-10-27 01:56:23,222 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:56:23,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/insertion_sort-1.c [2020-10-27 01:56:23,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e13e57ec/b0c22d19285a49269cfaadbc5936190c/FLAG02a0d59ee [2020-10-27 01:56:23,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e13e57ec/b0c22d19285a49269cfaadbc5936190c [2020-10-27 01:56:23,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:56:23,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:56:23,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:56:23,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:56:23,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:56:23,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a73188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23, skipping insertion in model container [2020-10-27 01:56:23,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:56:23,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:56:23,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:56:23,810 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:56:23,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:56:23,851 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:56:23,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23 WrapperNode [2020-10-27 01:56:23,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:56:23,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:56:23,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:56:23,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:56:23,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (1/1) ... [2020-10-27 01:56:23,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:56:23,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:56:23,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:56:23,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:56:23,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (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 01:56:24,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:56:24,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:56:24,025 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:56:24,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:56:24,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:56:24,025 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:56:24,025 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:56:24,025 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:56:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:56:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:56:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:56:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:56:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:56:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:56:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:56:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:56:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:56:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:56:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:56:24,332 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:56:24,333 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 01:56:24,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:56:24 BoogieIcfgContainer [2020-10-27 01:56:24,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:56:24,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:56:24,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:56:24,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:56:24,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:56:23" (1/3) ... [2020-10-27 01:56:24,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792c3f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:56:24, skipping insertion in model container [2020-10-27 01:56:24,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:23" (2/3) ... [2020-10-27 01:56:24,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792c3f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:56:24, skipping insertion in model container [2020-10-27 01:56:24,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:56:24" (3/3) ... [2020-10-27 01:56:24,345 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2020-10-27 01:56:24,359 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:56:24,364 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:56:24,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:56:24,437 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:56:24,437 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:56:24,437 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:56:24,438 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:56:24,438 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:56:24,438 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:56:24,438 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:56:24,438 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:56:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 01:56:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:56:24,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:24,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:24,463 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash 458833482, now seen corresponding path program 1 times [2020-10-27 01:56:24,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:24,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559776623] [2020-10-27 01:56:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:25,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:56:25,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:56:25,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-27 01:56:25,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:56:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:25,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:56:25,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:56:25,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:25,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:25,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:25,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:56:25,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:25,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:25,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:25,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:25,595 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 01:56:25,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559776623] [2020-10-27 01:56:25,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:56:25,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:56:25,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316704409] [2020-10-27 01:56:25,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:56:25,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:56:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:56:25,620 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-10-27 01:56:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:25,787 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2020-10-27 01:56:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:56:25,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:56:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:25,797 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:56:25,797 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:56:25,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:56:25,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:56:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:56:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:56:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-27 01:56:25,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2020-10-27 01:56:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:25,849 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-27 01:56:25,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:56:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-27 01:56:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:56:25,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:25,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:25,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:56:25,851 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:25,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1203467220, now seen corresponding path program 1 times [2020-10-27 01:56:25,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:25,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260000063] [2020-10-27 01:56:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:25,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:26,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:56:26,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:56:26,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-27 01:56:26,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:26,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:56:26,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:26,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:56:26,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:56:26,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:26,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:26,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:26,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:56:26,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:26,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:26,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260000063] [2020-10-27 01:56:26,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:26,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:56:26,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995625899] [2020-10-27 01:56:26,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:56:26,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:26,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:56:26,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:56:26,611 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2020-10-27 01:56:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:26,800 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2020-10-27 01:56:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:56:26,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:56:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:26,802 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:56:26,802 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:56:26,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:56:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:56:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-27 01:56:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:56:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-27 01:56:26,813 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 18 [2020-10-27 01:56:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:26,813 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-27 01:56:26,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:56:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-27 01:56:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:56:26,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:26,815 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] [2020-10-27 01:56:26,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:56:26,815 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:26,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1137601115, now seen corresponding path program 1 times [2020-10-27 01:56:26,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:26,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903174655] [2020-10-27 01:56:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:27,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:56:27,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-27 01:56:27,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:56:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:56:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:56:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:27,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:27,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:27,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:27,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:27,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:27,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:27,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:27,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:56:27,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903174655] [2020-10-27 01:56:27,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:27,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:56:27,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236611890] [2020-10-27 01:56:27,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:56:27,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:27,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:56:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:56:27,601 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 12 states. [2020-10-27 01:56:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:28,222 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2020-10-27 01:56:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:56:28,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-27 01:56:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:28,226 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:56:28,227 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:56:28,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:56:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:56:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2020-10-27 01:56:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:56:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-27 01:56:28,242 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 26 [2020-10-27 01:56:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:28,243 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-27 01:56:28,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:56:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-27 01:56:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:56:28,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:28,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:28,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:56:28,245 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash -962346301, now seen corresponding path program 1 times [2020-10-27 01:56:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:28,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052401731] [2020-10-27 01:56:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:28,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:28,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:32,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:32,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:32,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:33,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:33,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:56:33,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:56:33,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:56:33,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:56:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:56:33,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:34,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:34,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:34,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:34,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:34,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:34,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:34,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:34,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:56:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:34,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052401731] [2020-10-27 01:56:34,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:34,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:56:34,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293165529] [2020-10-27 01:56:34,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:56:34,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:56:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:56:34,226 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 18 states. [2020-10-27 01:56:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:39,556 INFO L93 Difference]: Finished difference Result 252 states and 338 transitions. [2020-10-27 01:56:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 01:56:39,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-27 01:56:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:39,563 INFO L225 Difference]: With dead ends: 252 [2020-10-27 01:56:39,563 INFO L226 Difference]: Without dead ends: 232 [2020-10-27 01:56:39,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=703, Invalid=3719, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:56:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-27 01:56:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 76. [2020-10-27 01:56:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:56:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-10-27 01:56:39,591 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 31 [2020-10-27 01:56:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:39,592 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-10-27 01:56:39,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:56:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-10-27 01:56:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:56:39,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:39,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:39,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:56:39,594 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1744273093, now seen corresponding path program 1 times [2020-10-27 01:56:39,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:39,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378325899] [2020-10-27 01:56:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:39,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:39,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:41,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:41,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:44,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:44,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:56:44,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:56:44,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:56:44,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:56:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:44,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:56:44,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:45,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:45,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:45,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:45,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:45,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:45,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:45,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378325899] [2020-10-27 01:56:45,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:45,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:56:45,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568445460] [2020-10-27 01:56:45,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:56:45,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:56:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:56:45,291 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 19 states. [2020-10-27 01:56:47,094 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 01:56:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:51,607 INFO L93 Difference]: Finished difference Result 307 states and 410 transitions. [2020-10-27 01:56:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-27 01:56:51,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 31 [2020-10-27 01:56:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:51,613 INFO L225 Difference]: With dead ends: 307 [2020-10-27 01:56:51,613 INFO L226 Difference]: Without dead ends: 304 [2020-10-27 01:56:51,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1350, Invalid=7022, Unknown=0, NotChecked=0, Total=8372 [2020-10-27 01:56:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-27 01:56:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 96. [2020-10-27 01:56:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:56:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 131 transitions. [2020-10-27 01:56:51,642 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 131 transitions. Word has length 31 [2020-10-27 01:56:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:51,642 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 131 transitions. [2020-10-27 01:56:51,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:56:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 131 transitions. [2020-10-27 01:56:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:56:51,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:51,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:51,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:56:51,645 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2002438531, now seen corresponding path program 1 times [2020-10-27 01:56:51,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:51,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082597573] [2020-10-27 01:56:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:51,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:51,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:51,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:56:51,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:56:51,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 01:56:51,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:56:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 01:56:51,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:56:51,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:51,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:51,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:51,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:51,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:51,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:51,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:56:51,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:51,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:51,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:56:51,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082597573] [2020-10-27 01:56:51,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:56:51,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:56:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692912108] [2020-10-27 01:56:51,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:56:51,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:51,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:56:51,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:56:51,908 INFO L87 Difference]: Start difference. First operand 96 states and 131 transitions. Second operand 6 states. [2020-10-27 01:56:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:52,053 INFO L93 Difference]: Finished difference Result 191 states and 262 transitions. [2020-10-27 01:56:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:56:52,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-27 01:56:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:52,055 INFO L225 Difference]: With dead ends: 191 [2020-10-27 01:56:52,055 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:56:52,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:56:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:56:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2020-10-27 01:56:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:56:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2020-10-27 01:56:52,084 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 31 [2020-10-27 01:56:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:52,085 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2020-10-27 01:56:52,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:56:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2020-10-27 01:56:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:56:52,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:52,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:52,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:56:52,089 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1501143704, now seen corresponding path program 2 times [2020-10-27 01:56:52,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:52,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067792165] [2020-10-27 01:56:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:55,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:55,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:56:55,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:56:55,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3566 [2020-10-27 01:56:55,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:56:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:56:55,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:55,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:55,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:55,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:55,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:55,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:55,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:55,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:55,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:55,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067792165] [2020-10-27 01:56:55,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:55,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:56:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248229356] [2020-10-27 01:56:55,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:56:55,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:56:55,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:56:55,816 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand 9 states. [2020-10-27 01:56:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:56,035 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2020-10-27 01:56:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:56:56,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-27 01:56:56,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:56,037 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:56:56,037 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:56:56,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:56:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:56:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 73. [2020-10-27 01:56:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:56:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-27 01:56:56,059 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 32 [2020-10-27 01:56:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:56,060 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-27 01:56:56,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:56:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-27 01:56:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:56:56,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:56,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:56,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:56:56,065 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1006902337, now seen corresponding path program 1 times [2020-10-27 01:56:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:56,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629144048] [2020-10-27 01:56:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:56,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:56,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:56,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:56,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:56:56,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:56:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-27 01:56:56,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:56:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:56,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:56:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:56,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:56,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:56,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:56,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:56,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:56,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:56:56,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:56,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:56,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 01:56:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:56,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:56,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:56:56,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:56,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:56,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:56:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:56:56,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:56:57,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629144048] [2020-10-27 01:56:57,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:57,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:56:57,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280875936] [2020-10-27 01:56:57,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:56:57,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:56:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:56:57,003 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 9 states. [2020-10-27 01:56:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:57,238 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2020-10-27 01:56:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:56:57,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:56:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:57,240 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:56:57,241 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:56:57,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:56:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:56:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2020-10-27 01:56:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:56:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-10-27 01:56:57,267 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 34 [2020-10-27 01:56:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:57,268 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-10-27 01:56:57,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:56:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-10-27 01:56:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:56:57,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:57,273 INFO L422 BasicCegarLoop]: trace histogram [3, 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 01:56:57,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:56:57,274 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:57,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:57,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1490728097, now seen corresponding path program 2 times [2020-10-27 01:56:57,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:57,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954206273] [2020-10-27 01:56:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:57,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:59,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:02,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:02,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:02,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:57:02,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:57:02,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-27 01:57:02,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:57:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:57:02,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:57:02,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:02,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:02,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:02,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:02,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:57:02,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:02,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:02,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:57:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954206273] [2020-10-27 01:57:02,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:02,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:57:02,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575228224] [2020-10-27 01:57:02,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:57:02,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:02,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:57:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:57:02,580 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 9 states. [2020-10-27 01:57:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:02,908 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2020-10-27 01:57:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:57:02,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 01:57:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:02,910 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:57:02,910 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:57:02,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:57:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:57:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-10-27 01:57:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:57:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-27 01:57:02,924 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 33 [2020-10-27 01:57:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:02,924 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-27 01:57:02,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:57:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-27 01:57:02,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:57:02,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:02,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:02,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:57:02,929 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:02,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1529718602, now seen corresponding path program 3 times [2020-10-27 01:57:02,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:02,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848058567] [2020-10-27 01:57:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:02,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:03,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:03,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:03,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:57:03,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:57:03,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 969 [2020-10-27 01:57:03,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:57:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:57:03,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:57:03,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:04,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:04,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:04,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:04,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:04,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:04,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:04,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:04,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:04,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:04,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:04,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 01:57:04,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848058567] [2020-10-27 01:57:04,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:04,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:57:04,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417472723] [2020-10-27 01:57:04,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:57:04,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:57:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:57:04,325 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 15 states. [2020-10-27 01:57:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:05,434 INFO L93 Difference]: Finished difference Result 119 states and 151 transitions. [2020-10-27 01:57:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:57:05,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 01:57:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:05,438 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:57:05,438 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:57:05,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:57:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:57:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2020-10-27 01:57:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:57:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2020-10-27 01:57:05,457 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 34 [2020-10-27 01:57:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:05,458 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2020-10-27 01:57:05,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:57:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2020-10-27 01:57:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:57:05,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:05,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:05,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:57:05,461 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1832928052, now seen corresponding path program 3 times [2020-10-27 01:57:05,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:05,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401329027] [2020-10-27 01:57:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:05,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:07,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:08,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:08,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:09,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:09,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:10,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:10,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:10,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:57:10,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 01:57:10,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:57:10,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:10,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:57:10,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:10,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:57:10,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:11,013 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-27 01:57:11,195 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-27 01:57:11,367 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-27 01:57:11,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:11,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:11,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:11,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:11,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:11,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:11,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:11,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:11,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:11,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:57:11,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401329027] [2020-10-27 01:57:11,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:11,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:57:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160337158] [2020-10-27 01:57:11,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:57:11,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:57:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:57:11,749 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand 21 states. [2020-10-27 01:57:17,117 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-27 01:57:18,742 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-27 01:57:19,464 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 01:57:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:19,593 INFO L93 Difference]: Finished difference Result 376 states and 526 transitions. [2020-10-27 01:57:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-27 01:57:19,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-27 01:57:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:19,605 INFO L225 Difference]: With dead ends: 376 [2020-10-27 01:57:19,606 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 01:57:19,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1457, Invalid=7473, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:57:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 01:57:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 95. [2020-10-27 01:57:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:57:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2020-10-27 01:57:19,628 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 39 [2020-10-27 01:57:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:19,628 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2020-10-27 01:57:19,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:57:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2020-10-27 01:57:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:57:19,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:19,629 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:19,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:57:19,629 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash 811229812, now seen corresponding path program 1 times [2020-10-27 01:57:19,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:19,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092533205] [2020-10-27 01:57:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:19,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:19,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:19,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:20,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:21,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:22,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:22,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:22,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:22,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:23,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:23,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:23,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:23,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:23,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:23,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:24,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:24,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:24,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:57:24,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:57:24,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:57:24,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:57:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:24,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:57:24,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:24,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:24,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:24,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:24,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:57:24,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092533205] [2020-10-27 01:57:24,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:24,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:57:24,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495546779] [2020-10-27 01:57:24,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:57:24,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:24,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:57:24,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:57:24,959 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand 14 states. [2020-10-27 01:57:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:26,437 INFO L93 Difference]: Finished difference Result 328 states and 440 transitions. [2020-10-27 01:57:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:57:26,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 01:57:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:26,441 INFO L225 Difference]: With dead ends: 328 [2020-10-27 01:57:26,441 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 01:57:26,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:57:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 01:57:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 161. [2020-10-27 01:57:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:57:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 217 transitions. [2020-10-27 01:57:26,467 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 217 transitions. Word has length 39 [2020-10-27 01:57:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:26,467 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 217 transitions. [2020-10-27 01:57:26,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:57:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 217 transitions. [2020-10-27 01:57:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:57:26,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:26,469 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:26,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:57:26,469 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1338711916, now seen corresponding path program 2 times [2020-10-27 01:57:26,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:26,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795038113] [2020-10-27 01:57:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:26,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:26,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:26,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:26,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:26,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:27,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:27,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:27,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:27,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:28,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:30,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:31,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:31,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:31,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:57:31,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 01:57:31,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:57:31,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:31,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:57:31,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:31,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:57:31,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:33,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:33,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:33,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:33,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:33,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:33,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:33,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:33,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:33,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:33,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:57:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795038113] [2020-10-27 01:57:33,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:33,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:57:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806374848] [2020-10-27 01:57:33,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:57:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:57:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:57:33,630 INFO L87 Difference]: Start difference. First operand 161 states and 217 transitions. Second operand 26 states. [2020-10-27 01:57:36,008 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2020-10-27 01:57:37,094 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-10-27 01:57:37,282 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-27 01:57:37,478 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 01:57:37,970 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-27 01:57:38,452 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-10-27 01:57:39,330 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 63 [2020-10-27 01:57:40,632 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 65 [2020-10-27 01:57:40,894 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-27 01:57:41,093 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-27 01:57:41,302 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 63 [2020-10-27 01:57:41,482 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2020-10-27 01:57:41,800 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-10-27 01:57:43,291 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-10-27 01:57:43,767 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-27 01:57:44,120 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-27 01:57:44,377 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-27 01:57:44,564 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-27 01:57:45,267 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2020-10-27 01:57:45,502 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-27 01:57:46,015 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 51 [2020-10-27 01:57:46,282 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-27 01:57:46,486 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 01:57:46,724 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-27 01:57:46,948 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-27 01:57:47,257 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2020-10-27 01:57:47,554 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-10-27 01:57:47,872 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2020-10-27 01:57:48,151 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2020-10-27 01:57:48,544 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-27 01:57:49,077 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-27 01:57:49,470 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2020-10-27 01:57:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:49,631 INFO L93 Difference]: Finished difference Result 761 states and 1059 transitions. [2020-10-27 01:57:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-27 01:57:49,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2020-10-27 01:57:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:49,640 INFO L225 Difference]: With dead ends: 761 [2020-10-27 01:57:49,640 INFO L226 Difference]: Without dead ends: 668 [2020-10-27 01:57:49,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3536 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1645, Invalid=9485, Unknown=0, NotChecked=0, Total=11130 [2020-10-27 01:57:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-10-27 01:57:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 325. [2020-10-27 01:57:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 01:57:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 447 transitions. [2020-10-27 01:57:49,702 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 447 transitions. Word has length 39 [2020-10-27 01:57:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:49,703 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 447 transitions. [2020-10-27 01:57:49,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:57:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 447 transitions. [2020-10-27 01:57:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:57:49,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:49,704 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:49,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:57:49,705 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash -95749584, now seen corresponding path program 2 times [2020-10-27 01:57:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:49,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409398746] [2020-10-27 01:57:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:49,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:50,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:50,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:57:50,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:50,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-27 01:57:50,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:50,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:57:50,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:57:50,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:57:50,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:50,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:50,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:50,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:50,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:50,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:50,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:50,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 01:57:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:50,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:50,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:50,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:57:50,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:50,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:50,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:50,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:57:50,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:50,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:57:50,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:57:50,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409398746] [2020-10-27 01:57:50,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:50,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:57:50,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644600890] [2020-10-27 01:57:50,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:57:50,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:50,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:57:50,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:57:50,414 INFO L87 Difference]: Start difference. First operand 325 states and 447 transitions. Second operand 14 states. [2020-10-27 01:57:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:51,302 INFO L93 Difference]: Finished difference Result 517 states and 720 transitions. [2020-10-27 01:57:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:57:51,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 01:57:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:51,308 INFO L225 Difference]: With dead ends: 517 [2020-10-27 01:57:51,309 INFO L226 Difference]: Without dead ends: 514 [2020-10-27 01:57:51,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:57:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-27 01:57:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 360. [2020-10-27 01:57:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-27 01:57:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 491 transitions. [2020-10-27 01:57:51,368 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 491 transitions. Word has length 42 [2020-10-27 01:57:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:51,369 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 491 transitions. [2020-10-27 01:57:51,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:57:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 491 transitions. [2020-10-27 01:57:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:57:51,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:51,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:51,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:57:51,371 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1272533834, now seen corresponding path program 3 times [2020-10-27 01:57:51,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:51,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345989982] [2020-10-27 01:57:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:51,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:51,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:51,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:54,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:55,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:55,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:55,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:56,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:57:56,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:56,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:56,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:56,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:56,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:56,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:56,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:56,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:56,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:56,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:57:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345989982] [2020-10-27 01:57:56,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:56,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:57:56,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276286260] [2020-10-27 01:57:56,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:57:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:57:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:57:56,759 INFO L87 Difference]: Start difference. First operand 360 states and 491 transitions. Second operand 16 states. [2020-10-27 01:57:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:59,536 INFO L93 Difference]: Finished difference Result 761 states and 1047 transitions. [2020-10-27 01:57:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:57:59,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 01:57:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:59,541 INFO L225 Difference]: With dead ends: 761 [2020-10-27 01:57:59,541 INFO L226 Difference]: Without dead ends: 728 [2020-10-27 01:57:59,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=456, Invalid=2094, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:57:59,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-10-27 01:57:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 375. [2020-10-27 01:57:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-27 01:57:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 509 transitions. [2020-10-27 01:57:59,622 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 509 transitions. Word has length 41 [2020-10-27 01:57:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:59,622 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 509 transitions. [2020-10-27 01:57:59,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:57:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 509 transitions. [2020-10-27 01:57:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:57:59,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:59,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:59,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:57:59,624 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash -454784630, now seen corresponding path program 4 times [2020-10-27 01:57:59,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:59,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750019016] [2020-10-27 01:57:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:59,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:59,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:59,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:03,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:03,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:04,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:04,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:04,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:04,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:58:04,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:04,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:04,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:04,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:04,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:58:04,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750019016] [2020-10-27 01:58:04,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:04,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:58:04,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330098312] [2020-10-27 01:58:04,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:58:04,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:04,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:58:04,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:58:04,843 INFO L87 Difference]: Start difference. First operand 375 states and 509 transitions. Second operand 13 states. [2020-10-27 01:58:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:06,940 INFO L93 Difference]: Finished difference Result 887 states and 1196 transitions. [2020-10-27 01:58:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 01:58:06,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-27 01:58:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:06,945 INFO L225 Difference]: With dead ends: 887 [2020-10-27 01:58:06,945 INFO L226 Difference]: Without dead ends: 564 [2020-10-27 01:58:06,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=653, Invalid=2653, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:58:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-27 01:58:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 263. [2020-10-27 01:58:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-27 01:58:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 335 transitions. [2020-10-27 01:58:06,998 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 335 transitions. Word has length 44 [2020-10-27 01:58:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:06,998 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 335 transitions. [2020-10-27 01:58:06,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:58:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 335 transitions. [2020-10-27 01:58:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:58:06,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:06,999 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:06,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:58:07,000 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash -196619192, now seen corresponding path program 4 times [2020-10-27 01:58:07,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:07,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330095203] [2020-10-27 01:58:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:07,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:08,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:08,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:58:12,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:12,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:12,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:12,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:12,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:12,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:12,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:12,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:58:12,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330095203] [2020-10-27 01:58:12,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:12,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:58:12,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475202506] [2020-10-27 01:58:12,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:58:12,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:58:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:58:12,520 INFO L87 Difference]: Start difference. First operand 263 states and 335 transitions. Second operand 20 states. [2020-10-27 01:58:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:19,330 INFO L93 Difference]: Finished difference Result 667 states and 834 transitions. [2020-10-27 01:58:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-27 01:58:19,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-27 01:58:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:19,338 INFO L225 Difference]: With dead ends: 667 [2020-10-27 01:58:19,338 INFO L226 Difference]: Without dead ends: 664 [2020-10-27 01:58:19,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4682 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1549, Invalid=11333, Unknown=0, NotChecked=0, Total=12882 [2020-10-27 01:58:19,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2020-10-27 01:58:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 272. [2020-10-27 01:58:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 01:58:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 346 transitions. [2020-10-27 01:58:19,408 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 346 transitions. Word has length 44 [2020-10-27 01:58:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:19,408 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 346 transitions. [2020-10-27 01:58:19,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:58:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 346 transitions. [2020-10-27 01:58:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:58:19,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:19,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:19,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:58:19,410 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:19,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:19,411 INFO L82 PathProgramCache]: Analyzing trace with hash -803206118, now seen corresponding path program 1 times [2020-10-27 01:58:19,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:19,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328308460] [2020-10-27 01:58:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:19,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:21,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:21,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:58:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:25,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:25,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:25,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:25,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:25,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:25,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:25,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 01:58:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:25,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:25,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:58:25,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:25,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:25,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:25,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:58:25,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:25,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:58:25,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:58:25,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328308460] [2020-10-27 01:58:25,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:25,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:58:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387687918] [2020-10-27 01:58:25,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:58:25,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:58:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:58:25,079 INFO L87 Difference]: Start difference. First operand 272 states and 346 transitions. Second operand 21 states. [2020-10-27 01:58:28,174 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-10-27 01:58:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:28,816 INFO L93 Difference]: Finished difference Result 521 states and 669 transitions. [2020-10-27 01:58:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:58:28,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-27 01:58:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:28,821 INFO L225 Difference]: With dead ends: 521 [2020-10-27 01:58:28,821 INFO L226 Difference]: Without dead ends: 518 [2020-10-27 01:58:28,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=554, Invalid=3868, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:58:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-10-27 01:58:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 437. [2020-10-27 01:58:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-27 01:58:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 574 transitions. [2020-10-27 01:58:28,913 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 574 transitions. Word has length 47 [2020-10-27 01:58:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:28,913 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 574 transitions. [2020-10-27 01:58:28,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:58:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 574 transitions. [2020-10-27 01:58:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:58:28,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:28,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:28,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:58:28,915 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash 175186173, now seen corresponding path program 3 times [2020-10-27 01:58:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:28,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124546440] [2020-10-27 01:58:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:28,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:31,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:58:31,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:31,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2133 [2020-10-27 01:58:31,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:31,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:58:31,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:31,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:58:31,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:31,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:31,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:31,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:31,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:31,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:31,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:31,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:31,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:31,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:31,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 01:58:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:31,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:31,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:58:31,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:58:31,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:58:31,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:31,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:58:31,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124546440] [2020-10-27 01:58:31,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:31,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:58:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263031228] [2020-10-27 01:58:31,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:58:31,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:58:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:31,337 INFO L87 Difference]: Start difference. First operand 437 states and 574 transitions. Second operand 11 states. [2020-10-27 01:58:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:31,919 INFO L93 Difference]: Finished difference Result 645 states and 838 transitions. [2020-10-27 01:58:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:58:31,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 01:58:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:31,924 INFO L225 Difference]: With dead ends: 645 [2020-10-27 01:58:31,924 INFO L226 Difference]: Without dead ends: 423 [2020-10-27 01:58:31,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:58:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-27 01:58:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 272. [2020-10-27 01:58:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 01:58:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 337 transitions. [2020-10-27 01:58:31,987 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 337 transitions. Word has length 48 [2020-10-27 01:58:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:31,987 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 337 transitions. [2020-10-27 01:58:31,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:58:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 337 transitions. [2020-10-27 01:58:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:58:31,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:31,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:31,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:58:31,989 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1197589727, now seen corresponding path program 5 times [2020-10-27 01:58:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:31,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083773153] [2020-10-27 01:58:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:32,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:32,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:33,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:33,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:33,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:34,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:34,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:34,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:35,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:35,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:35,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:37,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:58:37,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:58:37,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:58:37,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:37,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:58:37,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:37,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:58:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:38,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:38,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:38,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:58:38,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083773153] [2020-10-27 01:58:38,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:38,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:58:38,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234540221] [2020-10-27 01:58:38,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:58:38,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:38,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:58:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:58:38,436 INFO L87 Difference]: Start difference. First operand 272 states and 337 transitions. Second operand 26 states. [2020-10-27 01:58:41,719 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-27 01:58:42,010 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-27 01:58:44,635 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-27 01:58:45,233 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-27 01:58:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:47,014 INFO L93 Difference]: Finished difference Result 603 states and 755 transitions. [2020-10-27 01:58:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-27 01:58:47,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2020-10-27 01:58:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:47,019 INFO L225 Difference]: With dead ends: 603 [2020-10-27 01:58:47,019 INFO L226 Difference]: Without dead ends: 600 [2020-10-27 01:58:47,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1117, Invalid=7439, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:58:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-10-27 01:58:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 299. [2020-10-27 01:58:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-27 01:58:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 375 transitions. [2020-10-27 01:58:47,083 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 375 transitions. Word has length 47 [2020-10-27 01:58:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:47,083 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 375 transitions. [2020-10-27 01:58:47,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:58:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 375 transitions. [2020-10-27 01:58:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:58:47,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:47,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:47,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:58:47,084 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:47,085 INFO L82 PathProgramCache]: Analyzing trace with hash 129275671, now seen corresponding path program 5 times [2020-10-27 01:58:47,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:47,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978593745] [2020-10-27 01:58:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:47,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:49,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:52,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:58:52,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 01:58:52,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:58:52,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:58:52,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:58:52,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:53,397 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-27 01:58:53,631 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-27 01:58:54,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:54,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:54,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:54,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:54,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:54,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:54,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:54,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:54,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978593745] [2020-10-27 01:58:54,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:54,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:58:54,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289053615] [2020-10-27 01:58:54,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:58:54,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:54,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:58:54,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:58:54,085 INFO L87 Difference]: Start difference. First operand 299 states and 375 transitions. Second operand 25 states. [2020-10-27 01:58:57,605 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-27 01:58:58,149 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-27 01:58:58,333 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 01:58:58,607 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-27 01:58:58,832 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 01:58:59,173 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2020-10-27 01:58:59,385 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-27 01:58:59,796 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-27 01:59:00,012 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 01:59:00,353 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-27 01:59:00,536 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-27 01:59:00,868 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-27 01:59:01,093 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-27 01:59:01,298 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-27 01:59:01,700 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-27 01:59:02,076 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-27 01:59:02,358 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2020-10-27 01:59:02,540 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 01:59:02,928 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 44 [2020-10-27 01:59:03,130 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-27 01:59:03,854 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 48 [2020-10-27 01:59:04,165 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:59:04,409 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-27 01:59:05,498 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2020-10-27 01:59:05,816 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-27 01:59:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:06,281 INFO L93 Difference]: Finished difference Result 1034 states and 1338 transitions. [2020-10-27 01:59:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-27 01:59:06,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 47 [2020-10-27 01:59:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:06,295 INFO L225 Difference]: With dead ends: 1034 [2020-10-27 01:59:06,296 INFO L226 Difference]: Without dead ends: 948 [2020-10-27 01:59:06,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1040, Invalid=6616, Unknown=0, NotChecked=0, Total=7656 [2020-10-27 01:59:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-10-27 01:59:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 656. [2020-10-27 01:59:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-10-27 01:59:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 856 transitions. [2020-10-27 01:59:06,440 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 856 transitions. Word has length 47 [2020-10-27 01:59:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:06,441 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 856 transitions. [2020-10-27 01:59:06,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:59:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 856 transitions. [2020-10-27 01:59:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:59:06,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:06,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:06,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:59:06,443 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:06,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:06,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1299318550, now seen corresponding path program 4 times [2020-10-27 01:59:06,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:06,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717212553] [2020-10-27 01:59:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:06,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:08,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2404 [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:59:08,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:09,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:09,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:09,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:09,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:09,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 01:59:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:09,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:59:09,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:09,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 01:59:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:59:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:59:09,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717212553] [2020-10-27 01:59:09,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:09,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:59:09,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273367827] [2020-10-27 01:59:09,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:59:09,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:59:09,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:59:09,160 INFO L87 Difference]: Start difference. First operand 656 states and 856 transitions. Second operand 11 states. [2020-10-27 01:59:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:09,858 INFO L93 Difference]: Finished difference Result 1034 states and 1355 transitions. [2020-10-27 01:59:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:59:09,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 01:59:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:09,865 INFO L225 Difference]: With dead ends: 1034 [2020-10-27 01:59:09,865 INFO L226 Difference]: Without dead ends: 968 [2020-10-27 01:59:09,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:59:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-10-27 01:59:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 623. [2020-10-27 01:59:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-10-27 01:59:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 819 transitions. [2020-10-27 01:59:09,990 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 819 transitions. Word has length 50 [2020-10-27 01:59:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:09,990 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 819 transitions. [2020-10-27 01:59:09,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:59:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 819 transitions. [2020-10-27 01:59:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:59:09,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:09,992 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:09,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:59:09,993 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:09,993 INFO L82 PathProgramCache]: Analyzing trace with hash 928802527, now seen corresponding path program 5 times [2020-10-27 01:59:09,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:09,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782125573] [2020-10-27 01:59:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:10,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:10,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:59:10,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:11,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:11,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:11,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:11,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:11,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 01:59:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:11,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:59:11,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 01:59:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782125573] [2020-10-27 01:59:11,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:11,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:59:11,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741925968] [2020-10-27 01:59:11,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:59:11,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:59:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:59:11,068 INFO L87 Difference]: Start difference. First operand 623 states and 819 transitions. Second operand 15 states. [2020-10-27 01:59:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:12,335 INFO L93 Difference]: Finished difference Result 762 states and 992 transitions. [2020-10-27 01:59:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:59:12,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-27 01:59:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:12,341 INFO L225 Difference]: With dead ends: 762 [2020-10-27 01:59:12,341 INFO L226 Difference]: Without dead ends: 759 [2020-10-27 01:59:12,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:59:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2020-10-27 01:59:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 640. [2020-10-27 01:59:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-10-27 01:59:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 843 transitions. [2020-10-27 01:59:12,478 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 843 transitions. Word has length 50 [2020-10-27 01:59:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:12,478 INFO L481 AbstractCegarLoop]: Abstraction has 640 states and 843 transitions. [2020-10-27 01:59:12,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:59:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 843 transitions. [2020-10-27 01:59:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:59:12,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:12,480 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:12,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:59:12,481 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1261964533, now seen corresponding path program 6 times [2020-10-27 01:59:12,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:12,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636425505] [2020-10-27 01:59:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:12,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:14,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:14,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:17,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:17,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:59:17,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 01:59:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:59:17,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:59:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:17,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:59:17,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:17,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:17,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:17,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:59:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636425505] [2020-10-27 01:59:17,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:17,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:59:17,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67046541] [2020-10-27 01:59:17,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:59:17,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:59:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:59:17,843 INFO L87 Difference]: Start difference. First operand 640 states and 843 transitions. Second operand 13 states. [2020-10-27 01:59:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:19,137 INFO L93 Difference]: Finished difference Result 1076 states and 1417 transitions. [2020-10-27 01:59:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:59:19,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 01:59:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:19,143 INFO L225 Difference]: With dead ends: 1076 [2020-10-27 01:59:19,143 INFO L226 Difference]: Without dead ends: 1043 [2020-10-27 01:59:19,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:59:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-10-27 01:59:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 654. [2020-10-27 01:59:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-10-27 01:59:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 859 transitions. [2020-10-27 01:59:19,267 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 859 transitions. Word has length 49 [2020-10-27 01:59:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:19,268 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 859 transitions. [2020-10-27 01:59:19,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:59:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 859 transitions. [2020-10-27 01:59:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:59:19,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:19,270 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:19,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:59:19,270 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash -124101832, now seen corresponding path program 1 times [2020-10-27 01:59:19,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:19,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560600112] [2020-10-27 01:59:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:19,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:19,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:21,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:23,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:24,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:59:24,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:25,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:25,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:25,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 01:59:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:25,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:59:25,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:59:25,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560600112] [2020-10-27 01:59:25,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:25,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:59:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288001160] [2020-10-27 01:59:25,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:59:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:59:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:59:25,638 INFO L87 Difference]: Start difference. First operand 654 states and 859 transitions. Second operand 23 states. [2020-10-27 01:59:27,563 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-27 01:59:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:28,644 INFO L93 Difference]: Finished difference Result 727 states and 949 transitions. [2020-10-27 01:59:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:59:28,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 01:59:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:28,648 INFO L225 Difference]: With dead ends: 727 [2020-10-27 01:59:28,648 INFO L226 Difference]: Without dead ends: 710 [2020-10-27 01:59:28,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:59:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-10-27 01:59:28,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 654. [2020-10-27 01:59:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-10-27 01:59:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 858 transitions. [2020-10-27 01:59:28,754 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 858 transitions. Word has length 52 [2020-10-27 01:59:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:28,754 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 858 transitions. [2020-10-27 01:59:28,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:59:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 858 transitions. [2020-10-27 01:59:28,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:59:28,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:28,756 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:28,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:59:28,757 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -225365193, now seen corresponding path program 1 times [2020-10-27 01:59:28,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:28,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340387146] [2020-10-27 01:59:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:28,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:30,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:30,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:31,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:31,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:31,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:32,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:33,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:33,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:33,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:33,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:33,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:33,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:59:33,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 01:59:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 01:59:33,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:59:33,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 01:59:33,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:59:33,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:34,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:34,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:34,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:59:34,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340387146] [2020-10-27 01:59:34,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:34,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:59:34,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966861408] [2020-10-27 01:59:34,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:59:34,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:34,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:59:34,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:59:34,949 INFO L87 Difference]: Start difference. First operand 654 states and 858 transitions. Second operand 23 states. [2020-10-27 01:59:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:38,458 INFO L93 Difference]: Finished difference Result 1389 states and 1849 transitions. [2020-10-27 01:59:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:59:38,460 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 01:59:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:38,465 INFO L225 Difference]: With dead ends: 1389 [2020-10-27 01:59:38,465 INFO L226 Difference]: Without dead ends: 983 [2020-10-27 01:59:38,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=422, Invalid=2440, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:59:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-10-27 01:59:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 824. [2020-10-27 01:59:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2020-10-27 01:59:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1093 transitions. [2020-10-27 01:59:38,620 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1093 transitions. Word has length 52 [2020-10-27 01:59:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:38,620 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1093 transitions. [2020-10-27 01:59:38,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:59:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1093 transitions. [2020-10-27 01:59:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:59:38,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:38,624 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:38,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:59:38,624 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:38,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash 32800245, now seen corresponding path program 1 times [2020-10-27 01:59:38,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:38,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101931493] [2020-10-27 01:59:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:40,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:40,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:40,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:43,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:43,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:59:43,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 01:59:43,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 01:59:43,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:59:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:43,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:59:43,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:44,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:44,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:44,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:44,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:44,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:44,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:44,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:59:44,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101931493] [2020-10-27 01:59:44,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:44,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:59:44,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19180928] [2020-10-27 01:59:44,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:59:44,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:44,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:59:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:59:44,215 INFO L87 Difference]: Start difference. First operand 824 states and 1093 transitions. Second operand 18 states. [2020-10-27 01:59:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:48,565 INFO L93 Difference]: Finished difference Result 1821 states and 2396 transitions. [2020-10-27 01:59:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:59:48,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-27 01:59:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:48,573 INFO L225 Difference]: With dead ends: 1821 [2020-10-27 01:59:48,573 INFO L226 Difference]: Without dead ends: 1798 [2020-10-27 01:59:48,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=700, Invalid=2606, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:59:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2020-10-27 01:59:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 989. [2020-10-27 01:59:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 989 states. [2020-10-27 01:59:48,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1342 transitions. [2020-10-27 01:59:48,797 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1342 transitions. Word has length 52 [2020-10-27 01:59:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:48,797 INFO L481 AbstractCegarLoop]: Abstraction has 989 states and 1342 transitions. [2020-10-27 01:59:48,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:59:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1342 transitions. [2020-10-27 01:59:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:59:48,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:48,800 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:48,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:59:48,801 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1591949047, now seen corresponding path program 7 times [2020-10-27 01:59:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:48,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056949047] [2020-10-27 01:59:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:48,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:49,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:49,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:49,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:49,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:50,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:50,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:51,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:51,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:52,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:52,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:52,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:53,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:53,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:53,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:53,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:59:53,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 01:59:53,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:59:53,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:53,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:59:53,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:53,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:59:53,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:54,770 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-27 01:59:54,943 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 01:59:55,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:55,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:55,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:59:55,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056949047] [2020-10-27 01:59:55,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:55,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:59:55,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590015156] [2020-10-27 01:59:55,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:59:55,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:55,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:59:55,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:59:55,808 INFO L87 Difference]: Start difference. First operand 989 states and 1342 transitions. Second operand 25 states. [2020-10-27 01:59:56,261 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2020-10-27 01:59:56,689 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-27 01:59:58,289 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-10-27 01:59:58,633 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 01:59:59,005 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-27 01:59:59,590 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-27 02:00:00,141 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42