/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:07:16,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:07:16,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:07:16,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:07:16,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:07:16,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:07:16,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:07:16,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:07:16,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:07:16,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:07:16,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:07:16,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:07:16,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:07:16,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:07:16,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:07:16,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:07:16,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:07:16,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:07:16,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:07:16,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:07:16,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:07:16,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:07:16,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:07:16,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:07:16,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:07:16,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:07:16,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:07:16,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:07:16,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:07:16,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:07:16,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:07:16,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:07:16,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:07:16,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:07:16,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:07:16,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:07:16,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:07:16,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:07:16,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:07:16,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:07:16,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:07:16,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:07:16,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:07:16,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:07:16,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:07:16,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:07:16,333 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:07:16,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:07:16,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:07:16,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:07:16,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:07:16,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:07:16,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:07:16,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:07:16,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:07:16,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:07:16,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:07:16,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:07:16,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:07:16,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:07:16,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:07:16,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:07:16,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:07:16,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:07:16,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:07:16,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:07:16,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:07:16,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:07:16,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:07:16,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:07:16,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:07:16,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:07:16,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:07:16,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:07:16,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:07:16,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:07:16,855 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:07:16,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2020-10-28 15:07:16,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/471700484/f851ebe57e034970b4a05b02512e8db2/FLAGde7e84aee [2020-10-28 15:07:17,445 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:07:17,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2020-10-28 15:07:17,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/471700484/f851ebe57e034970b4a05b02512e8db2/FLAGde7e84aee [2020-10-28 15:07:17,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/471700484/f851ebe57e034970b4a05b02512e8db2 [2020-10-28 15:07:17,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:07:17,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:07:17,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:07:17,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:07:17,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:07:17,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:07:17" (1/1) ... [2020-10-28 15:07:17,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd45989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:17, skipping insertion in model container [2020-10-28 15:07:17,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:07:17" (1/1) ... [2020-10-28 15:07:17,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:07:17,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:07:18,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:07:18,164 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:07:18,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:07:18,220 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:07:18,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18 WrapperNode [2020-10-28 15:07:18,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:07:18,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:07:18,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:07:18,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:07:18,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... [2020-10-28 15:07:18,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... [2020-10-28 15:07:18,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... [2020-10-28 15:07:18,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... [2020-10-28 15:07:18,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... [2020-10-28 15:07:18,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... [2020-10-28 15:07:18,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... [2020-10-28 15:07:18,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:07:18,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:07:18,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:07:18,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:07:18,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:07:18,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:07:18,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:07:18,458 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:07:18,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:07:18,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:07:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:07:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:07:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:07:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:07:18,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 15:07:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:07:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:07:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:07:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:07:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:07:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:07:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:07:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:07:18,798 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:07:18,799 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 15:07:18,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:07:18 BoogieIcfgContainer [2020-10-28 15:07:18,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:07:18,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:07:18,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:07:18,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:07:18,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:07:17" (1/3) ... [2020-10-28 15:07:18,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288fa39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:07:18, skipping insertion in model container [2020-10-28 15:07:18,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:07:18" (2/3) ... [2020-10-28 15:07:18,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288fa39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:07:18, skipping insertion in model container [2020-10-28 15:07:18,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:07:18" (3/3) ... [2020-10-28 15:07:18,810 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de62.c [2020-10-28 15:07:18,824 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:07:18,829 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:07:18,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:07:18,872 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:07:18,873 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:07:18,873 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:07:18,873 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:07:18,873 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:07:18,874 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:07:18,874 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:07:18,874 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:07:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 15:07:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:07:18,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:18,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:18,924 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash -929595754, now seen corresponding path program 1 times [2020-10-28 15:07:18,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:18,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28856784] [2020-10-28 15:07:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:19,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:19,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:07:19,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:19,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-28 15:07:19,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:19,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:07:19,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:19,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:07:19,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:19,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:19,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:19,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:19,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 15:07:19,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:19,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:19,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:19,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:19,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:19,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28856784] [2020-10-28 15:07:19,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:19,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:07:19,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324909279] [2020-10-28 15:07:19,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:07:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:19,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:07:19,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:07:19,758 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 15:07:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:19,871 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2020-10-28 15:07:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:07:19,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 15:07:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:19,884 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:07:19,885 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:07:19,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:07:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:07:19,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:07:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:07:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-10-28 15:07:19,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 18 [2020-10-28 15:07:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:19,952 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-10-28 15:07:19,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:07:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-10-28 15:07:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:07:19,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:19,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:19,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:07:19,956 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:19,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:19,957 INFO L82 PathProgramCache]: Analyzing trace with hash 689097498, now seen corresponding path program 1 times [2020-10-28 15:07:19,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:19,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288013331] [2020-10-28 15:07:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:20,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:07:20,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:20,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-28 15:07:20,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:20,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:07:20,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:20,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:20,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:20,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:20,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:20,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:07:20,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:20,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:20,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:20,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288013331] [2020-10-28 15:07:20,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:20,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:07:20,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720692111] [2020-10-28 15:07:20,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:20,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:20,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:20,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:20,496 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 6 states. [2020-10-28 15:07:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:20,728 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2020-10-28 15:07:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:07:20,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:07:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:20,731 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:07:20,731 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:07:20,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:07:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 15:07:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 15:07:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-10-28 15:07:20,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2020-10-28 15:07:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:20,742 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-10-28 15:07:20,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-10-28 15:07:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:07:20,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:20,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:20,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:07:20,744 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:20,745 INFO L82 PathProgramCache]: Analyzing trace with hash 956523487, now seen corresponding path program 1 times [2020-10-28 15:07:20,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:20,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819649021] [2020-10-28 15:07:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:20,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:07:21,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-28 15:07:21,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:07:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:07:21,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:21,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:21,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:21,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:21,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:07:21,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:21,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:21,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819649021] [2020-10-28 15:07:21,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:21,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:07:21,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850927287] [2020-10-28 15:07:21,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:07:21,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:21,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:07:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:07:21,175 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-10-28 15:07:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:21,335 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2020-10-28 15:07:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:07:21,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-28 15:07:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:21,339 INFO L225 Difference]: With dead ends: 51 [2020-10-28 15:07:21,339 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:07:21,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:07:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-28 15:07:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:07:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2020-10-28 15:07:21,360 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 19 [2020-10-28 15:07:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:21,361 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2020-10-28 15:07:21,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:07:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2020-10-28 15:07:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:07:21,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:21,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:21,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:07:21,364 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1494530896, now seen corresponding path program 1 times [2020-10-28 15:07:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:21,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494555625] [2020-10-28 15:07:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:21,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:07:21,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:21,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-28 15:07:21,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:21,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:07:21,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:21,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:21,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:21,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:07:21,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:21,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:21,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:21,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:07:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:21,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494555625] [2020-10-28 15:07:21,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:21,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:07:21,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72928532] [2020-10-28 15:07:21,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:21,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:21,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:21,786 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand 5 states. [2020-10-28 15:07:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:21,933 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2020-10-28 15:07:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:21,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:07:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:21,934 INFO L225 Difference]: With dead ends: 47 [2020-10-28 15:07:21,934 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:07:21,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:07:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 15:07:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:07:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-28 15:07:21,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 19 [2020-10-28 15:07:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:21,942 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-28 15:07:21,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-28 15:07:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:07:21,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:21,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:21,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:07:21,944 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:21,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1818741925, now seen corresponding path program 1 times [2020-10-28 15:07:21,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:21,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6600188] [2020-10-28 15:07:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:22,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:07:22,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-28 15:07:22,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:22,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:07:22,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:22,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:22,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:22,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:07:22,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:22,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:22,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:07:22,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6600188] [2020-10-28 15:07:22,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:22,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950857432] [2020-10-28 15:07:22,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:22,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:22,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:22,472 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 5 states. [2020-10-28 15:07:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:22,637 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2020-10-28 15:07:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:22,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 15:07:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:22,638 INFO L225 Difference]: With dead ends: 43 [2020-10-28 15:07:22,639 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:07:22,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:07:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 15:07:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:07:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-28 15:07:22,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 20 [2020-10-28 15:07:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:22,647 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-28 15:07:22,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-28 15:07:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:07:22,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:22,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:22,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:07:22,649 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:22,649 INFO L82 PathProgramCache]: Analyzing trace with hash 611090573, now seen corresponding path program 1 times [2020-10-28 15:07:22,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:22,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447636829] [2020-10-28 15:07:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:22,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:22,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:23,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:07:23,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:07:23,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-28 15:07:23,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:23,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:07:23,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:23,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:23,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:23,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:23,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:23,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:23,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:07:23,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:23,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:23,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:07:23,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447636829] [2020-10-28 15:07:23,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:23,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:23,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474148833] [2020-10-28 15:07:23,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:23,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:23,764 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 5 states. [2020-10-28 15:07:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:23,949 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-10-28 15:07:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:23,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 15:07:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:23,951 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:07:23,951 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:07:23,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:07:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 15:07:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2020-10-28 15:07:23,968 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 21 [2020-10-28 15:07:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:23,969 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2020-10-28 15:07:23,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2020-10-28 15:07:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:07:23,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:23,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:23,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:07:23,971 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1149097982, now seen corresponding path program 1 times [2020-10-28 15:07:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:23,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217826275] [2020-10-28 15:07:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:24,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:24,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:07:24,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:24,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 15:07:24,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:24,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:24,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:24,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:24,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:07:24,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:24,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:24,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:24,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:24,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:24,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:07:24,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:24,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:24,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:24,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:24,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:24,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:07:24,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217826275] [2020-10-28 15:07:24,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:24,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:24,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751803244] [2020-10-28 15:07:24,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:24,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:24,459 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand 6 states. [2020-10-28 15:07:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:24,800 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-10-28 15:07:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:24,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 15:07:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:24,803 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:07:24,803 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:07:24,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:07:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-10-28 15:07:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:07:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-10-28 15:07:24,812 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 21 [2020-10-28 15:07:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:24,813 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-10-28 15:07:24,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-10-28 15:07:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:07:24,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:24,814 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:24,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:07:24,814 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1952623777, now seen corresponding path program 2 times [2020-10-28 15:07:24,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:24,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539081099] [2020-10-28 15:07:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:24,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:24,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:25,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:07:25,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:07:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-28 15:07:25,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:25,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:25,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:07:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:25,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:25,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:25,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:25,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:25,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:25,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:07:25,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539081099] [2020-10-28 15:07:25,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:07:25,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:07:25,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582541652] [2020-10-28 15:07:25,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:25,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:25,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:25,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:25,430 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 5 states. [2020-10-28 15:07:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:25,649 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2020-10-28 15:07:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:07:25,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 15:07:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:25,651 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:07:25,651 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:07:25,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:07:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 15:07:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:07:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2020-10-28 15:07:25,659 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 21 [2020-10-28 15:07:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:25,659 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2020-10-28 15:07:25,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2020-10-28 15:07:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:07:25,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:25,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:25,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:07:25,660 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1194580027, now seen corresponding path program 1 times [2020-10-28 15:07:25,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:25,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210203457] [2020-10-28 15:07:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:25,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:25,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:07:25,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:25,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-28 15:07:25,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:25,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:25,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:07:25,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:25,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:25,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:25,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:25,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:25,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:25,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:25,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:25,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:25,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:07:25,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210203457] [2020-10-28 15:07:25,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:25,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:25,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620880898] [2020-10-28 15:07:25,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:25,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:25,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:25,822 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 5 states. [2020-10-28 15:07:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:26,041 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-10-28 15:07:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:26,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 15:07:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:26,044 INFO L225 Difference]: With dead ends: 65 [2020-10-28 15:07:26,044 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 15:07:26,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 15:07:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-10-28 15:07:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:07:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2020-10-28 15:07:26,063 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 22 [2020-10-28 15:07:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:26,064 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2020-10-28 15:07:26,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2020-10-28 15:07:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:07:26,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:26,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:26,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:07:26,068 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1613664640, now seen corresponding path program 1 times [2020-10-28 15:07:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:26,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993713985] [2020-10-28 15:07:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:26,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:07:26,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:26,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-28 15:07:26,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:26,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:26,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:07:26,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:07:26,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:07:26,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:26,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:26,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:26,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:26,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:26,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:26,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:26,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:07:26,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993713985] [2020-10-28 15:07:26,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:26,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:26,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568003436] [2020-10-28 15:07:26,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:26,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:26,287 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 5 states. [2020-10-28 15:07:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:26,516 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2020-10-28 15:07:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:26,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-28 15:07:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:26,517 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:07:26,517 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:07:26,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:07:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-28 15:07:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:07:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2020-10-28 15:07:26,534 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 23 [2020-10-28 15:07:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:26,534 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2020-10-28 15:07:26,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2020-10-28 15:07:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:07:26,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:26,538 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:26,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:07:26,538 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1690443874, now seen corresponding path program 2 times [2020-10-28 15:07:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:26,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352702093] [2020-10-28 15:07:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:27,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:27,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:07:27,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:27,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-28 15:07:27,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:27,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:27,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:27,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:27,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:27,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:27,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:27,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:27,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:27,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:07:27,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:27,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:27,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:07:27,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352702093] [2020-10-28 15:07:27,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:27,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:27,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389411601] [2020-10-28 15:07:27,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:27,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:27,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:27,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:27,639 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand 7 states. [2020-10-28 15:07:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:27,991 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2020-10-28 15:07:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:27,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-28 15:07:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:27,993 INFO L225 Difference]: With dead ends: 69 [2020-10-28 15:07:27,993 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:07:27,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:07:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:07:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-10-28 15:07:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:07:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2020-10-28 15:07:28,007 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 23 [2020-10-28 15:07:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:28,007 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2020-10-28 15:07:28,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2020-10-28 15:07:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:07:28,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:28,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:28,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:07:28,012 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash -446666183, now seen corresponding path program 1 times [2020-10-28 15:07:28,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:28,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711485020] [2020-10-28 15:07:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:28,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:28,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:28,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:28,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-28 15:07:28,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:28,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:07:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:07:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:28,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:28,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:28,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:28,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:28,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:07:28,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:28,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:28,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:28,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:28,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:07:28,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711485020] [2020-10-28 15:07:28,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:28,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954015880] [2020-10-28 15:07:28,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:28,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:28,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:28,433 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand 7 states. [2020-10-28 15:07:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:28,758 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2020-10-28 15:07:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:07:28,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-28 15:07:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:28,759 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:07:28,760 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 15:07:28,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 15:07:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-10-28 15:07:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:07:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-10-28 15:07:28,774 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-10-28 15:07:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:28,774 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-10-28 15:07:28,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-10-28 15:07:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:07:28,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:28,775 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:28,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:07:28,776 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash -968892325, now seen corresponding path program 1 times [2020-10-28 15:07:28,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:28,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314128918] [2020-10-28 15:07:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:28,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:29,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:29,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:07:29,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-28 15:07:29,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:29,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:07:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:29,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:07:29,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:29,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:29,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:29,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:07:29,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:29,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:29,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:07:29,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314128918] [2020-10-28 15:07:29,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:29,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:07:29,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47336214] [2020-10-28 15:07:29,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:07:29,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:29,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:07:29,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:29,986 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 8 states. [2020-10-28 15:07:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:30,434 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-10-28 15:07:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:30,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 15:07:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:30,435 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:07:30,436 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:07:30,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:07:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:07:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-28 15:07:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:07:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2020-10-28 15:07:30,444 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 24 [2020-10-28 15:07:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:30,444 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2020-10-28 15:07:30,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:07:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2020-10-28 15:07:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:07:30,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:30,445 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] [2020-10-28 15:07:30,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:07:30,446 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1333009772, now seen corresponding path program 3 times [2020-10-28 15:07:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:30,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890540043] [2020-10-28 15:07:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:31,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:31,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:07:31,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:07:31,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1301 [2020-10-28 15:07:31,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:31,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:07:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:07:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:07:31,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:31,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:31,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:31,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:31,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:31,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:31,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:31,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:31,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:07:31,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890540043] [2020-10-28 15:07:31,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:31,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:31,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115195713] [2020-10-28 15:07:31,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:31,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:31,860 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 6 states. [2020-10-28 15:07:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:32,161 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2020-10-28 15:07:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:07:32,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 15:07:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:32,163 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:07:32,163 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 15:07:32,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 15:07:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-28 15:07:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:07:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2020-10-28 15:07:32,179 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 24 [2020-10-28 15:07:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:32,182 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2020-10-28 15:07:32,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2020-10-28 15:07:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:07:32,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:32,184 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:32,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:07:32,184 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash 107587744, now seen corresponding path program 2 times [2020-10-28 15:07:32,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:32,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690591442] [2020-10-28 15:07:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:32,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:33,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:07:33,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:33,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1101 [2020-10-28 15:07:33,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:33,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:33,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:07:33,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:33,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:07:33,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:33,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:33,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:33,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:33,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:33,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:33,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:33,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:07:33,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690591442] [2020-10-28 15:07:33,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:33,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:07:33,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844488144] [2020-10-28 15:07:33,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:07:33,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:33,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:07:33,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:07:33,390 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand 5 states. [2020-10-28 15:07:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:33,576 INFO L93 Difference]: Finished difference Result 105 states and 148 transitions. [2020-10-28 15:07:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:07:33,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-28 15:07:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:33,578 INFO L225 Difference]: With dead ends: 105 [2020-10-28 15:07:33,578 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:07:33,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:07:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-28 15:07:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 15:07:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-10-28 15:07:33,588 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 25 [2020-10-28 15:07:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:33,588 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-10-28 15:07:33,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:07:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-10-28 15:07:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:07:33,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:33,590 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:33,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:07:33,590 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:33,591 INFO L82 PathProgramCache]: Analyzing trace with hash -394051761, now seen corresponding path program 3 times [2020-10-28 15:07:33,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:33,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501443046] [2020-10-28 15:07:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:33,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:34,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:07:34,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:34,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-28 15:07:34,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:34,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:34,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:07:34,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:07:34,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:07:34,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:34,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:34,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:34,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:34,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:34,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:34,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:34,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:34,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:34,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:34,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:07:34,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501443046] [2020-10-28 15:07:34,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:34,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:07:34,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072465952] [2020-10-28 15:07:34,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:07:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:07:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:34,487 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 8 states. [2020-10-28 15:07:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:34,854 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2020-10-28 15:07:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:34,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-28 15:07:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:34,855 INFO L225 Difference]: With dead ends: 77 [2020-10-28 15:07:34,855 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 15:07:34,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:07:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 15:07:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 15:07:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 15:07:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2020-10-28 15:07:34,864 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 25 [2020-10-28 15:07:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:34,864 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2020-10-28 15:07:34,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:07:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2020-10-28 15:07:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:34,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:34,865 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] [2020-10-28 15:07:34,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:07:34,865 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash -345248996, now seen corresponding path program 4 times [2020-10-28 15:07:34,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:34,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765739443] [2020-10-28 15:07:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:34,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:34,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:36,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:36,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-28 15:07:36,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:36,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:36,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:07:36,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:36,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:36,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:36,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:36,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:36,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:36,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:36,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:36,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:36,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:36,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:36,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:07:36,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765739443] [2020-10-28 15:07:36,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:36,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:36,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885789279] [2020-10-28 15:07:36,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:36,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:36,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:36,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:36,400 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand 7 states. [2020-10-28 15:07:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:36,788 INFO L93 Difference]: Finished difference Result 144 states and 210 transitions. [2020-10-28 15:07:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:07:36,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-28 15:07:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:36,789 INFO L225 Difference]: With dead ends: 144 [2020-10-28 15:07:36,789 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 15:07:36,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 15:07:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 84. [2020-10-28 15:07:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 15:07:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2020-10-28 15:07:36,801 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 26 [2020-10-28 15:07:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:36,802 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2020-10-28 15:07:36,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2020-10-28 15:07:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:36,804 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] [2020-10-28 15:07:36,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:07:36,804 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 619175290, now seen corresponding path program 2 times [2020-10-28 15:07:36,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:36,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655093521] [2020-10-28 15:07:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:36,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:36,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:37,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:38,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:38,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:07:38,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-10-28 15:07:38,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:38,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:07:38,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:07:38,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:38,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:38,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:38,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:38,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:38,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:38,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:38,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:38,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:38,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:38,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:38,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 15:07:38,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655093521] [2020-10-28 15:07:38,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:38,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:38,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334144064] [2020-10-28 15:07:38,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:38,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:38,264 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand 6 states. [2020-10-28 15:07:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:38,822 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2020-10-28 15:07:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:38,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 15:07:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:38,823 INFO L225 Difference]: With dead ends: 130 [2020-10-28 15:07:38,823 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 15:07:38,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 15:07:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-28 15:07:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 15:07:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2020-10-28 15:07:38,836 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 26 [2020-10-28 15:07:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:38,838 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2020-10-28 15:07:38,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2020-10-28 15:07:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:07:38,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:38,839 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:38,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:07:38,840 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1373889909, now seen corresponding path program 4 times [2020-10-28 15:07:38,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:38,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883178107] [2020-10-28 15:07:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:38,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:39,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:39,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:39,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:41,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:41,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:07:41,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2448 [2020-10-28 15:07:41,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:41,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:41,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:41,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:07:41,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:07:41,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:41,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:41,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:41,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:41,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:41,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:41,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:41,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:41,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:41,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 15:07:41,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883178107] [2020-10-28 15:07:41,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:41,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:07:41,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823420374] [2020-10-28 15:07:41,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:07:41,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:07:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:41,487 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand 9 states. [2020-10-28 15:07:44,074 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-28 15:07:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:44,703 INFO L93 Difference]: Finished difference Result 123 states and 173 transitions. [2020-10-28 15:07:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:07:44,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 15:07:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:44,705 INFO L225 Difference]: With dead ends: 123 [2020-10-28 15:07:44,705 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:07:44,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:07:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:07:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-10-28 15:07:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:07:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2020-10-28 15:07:44,723 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 26 [2020-10-28 15:07:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:44,723 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2020-10-28 15:07:44,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:07:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2020-10-28 15:07:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:07:44,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:44,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:44,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:07:44,724 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:44,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1531292913, now seen corresponding path program 3 times [2020-10-28 15:07:44,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:44,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730763514] [2020-10-28 15:07:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:44,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:45,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:46,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:46,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:07:46,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:46,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-28 15:07:46,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:46,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:46,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:07:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:46,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:46,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:46,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:46,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:46,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:46,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:46,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:07:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:07:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730763514] [2020-10-28 15:07:46,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:46,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:07:46,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388976270] [2020-10-28 15:07:46,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:07:46,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:46,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:07:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:07:46,690 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 9 states. [2020-10-28 15:07:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:47,390 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2020-10-28 15:07:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:07:47,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 15:07:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:47,392 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:07:47,392 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 15:07:47,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:07:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 15:07:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-28 15:07:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:07:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-10-28 15:07:47,403 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 27 [2020-10-28 15:07:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:47,404 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-10-28 15:07:47,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:07:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-10-28 15:07:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:47,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:47,405 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] [2020-10-28 15:07:47,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:07:47,405 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1524120518, now seen corresponding path program 4 times [2020-10-28 15:07:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:47,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358610162] [2020-10-28 15:07:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:47,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:47,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:47,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:47,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:47,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:47,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-28 15:07:47,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:47,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:07:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:47,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:47,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:47,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:47,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:47,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:47,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:47,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:47,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:47,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:47,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:07:47,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358610162] [2020-10-28 15:07:47,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:47,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:47,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393104597] [2020-10-28 15:07:47,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:47,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:47,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:47,790 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 6 states. [2020-10-28 15:07:48,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:48,152 INFO L93 Difference]: Finished difference Result 98 states and 131 transitions. [2020-10-28 15:07:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:07:48,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-28 15:07:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:48,154 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:07:48,154 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:07:48,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:07:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:07:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-28 15:07:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:07:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2020-10-28 15:07:48,176 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 28 [2020-10-28 15:07:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:48,176 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2020-10-28 15:07:48,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2020-10-28 15:07:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:48,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:48,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:48,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:07:48,178 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1867110297, now seen corresponding path program 5 times [2020-10-28 15:07:48,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:48,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000323668] [2020-10-28 15:07:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:49,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:49,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:49,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:07:49,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1761 [2020-10-28 15:07:49,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:49,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:07:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:49,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:50,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:50,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:50,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:50,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:50,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:50,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 15:07:50,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000323668] [2020-10-28 15:07:50,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:50,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:07:50,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204019198] [2020-10-28 15:07:50,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:07:50,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:50,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:07:50,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:50,097 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand 8 states. [2020-10-28 15:07:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:50,606 INFO L93 Difference]: Finished difference Result 196 states and 280 transitions. [2020-10-28 15:07:50,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:50,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 15:07:50,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:50,610 INFO L225 Difference]: With dead ends: 196 [2020-10-28 15:07:50,610 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 15:07:50,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:07:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 15:07:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-28 15:07:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 15:07:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2020-10-28 15:07:50,626 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 28 [2020-10-28 15:07:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:50,627 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2020-10-28 15:07:50,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:07:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2020-10-28 15:07:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:07:50,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:50,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:50,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:07:50,628 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1171837851, now seen corresponding path program 5 times [2020-10-28 15:07:50,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:50,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899778163] [2020-10-28 15:07:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:50,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:50,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:52,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:07:52,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:52,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-28 15:07:52,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:52,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:07:52,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:52,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:52,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:52,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:52,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:52,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:52,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:07:52,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:52,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:52,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:52,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:52,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:52,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:07:52,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899778163] [2020-10-28 15:07:52,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:52,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:52,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33671515] [2020-10-28 15:07:52,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:52,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:52,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:52,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:52,219 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand 7 states. [2020-10-28 15:07:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:55,285 INFO L93 Difference]: Finished difference Result 219 states and 298 transitions. [2020-10-28 15:07:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:07:55,285 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-28 15:07:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:55,287 INFO L225 Difference]: With dead ends: 219 [2020-10-28 15:07:55,287 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 15:07:55,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:07:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 15:07:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 133. [2020-10-28 15:07:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-28 15:07:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 178 transitions. [2020-10-28 15:07:55,304 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 178 transitions. Word has length 28 [2020-10-28 15:07:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:55,305 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 178 transitions. [2020-10-28 15:07:55,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 178 transitions. [2020-10-28 15:07:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:55,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:55,306 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] [2020-10-28 15:07:55,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:07:55,307 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:55,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1599681040, now seen corresponding path program 6 times [2020-10-28 15:07:55,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:55,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251625716] [2020-10-28 15:07:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:55,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:55,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:55,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:55,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-28 15:07:55,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:55,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:07:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:07:55,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:07:55,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:55,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:55,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:55,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:55,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:55,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:55,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:55,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:55,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:55,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:07:55,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251625716] [2020-10-28 15:07:55,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:55,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:07:55,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040152765] [2020-10-28 15:07:55,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:07:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:07:55,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:07:55,688 INFO L87 Difference]: Start difference. First operand 133 states and 178 transitions. Second operand 6 states. [2020-10-28 15:07:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:56,065 INFO L93 Difference]: Finished difference Result 153 states and 205 transitions. [2020-10-28 15:07:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:07:56,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-28 15:07:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:56,069 INFO L225 Difference]: With dead ends: 153 [2020-10-28 15:07:56,069 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 15:07:56,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:07:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 15:07:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-28 15:07:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 15:07:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2020-10-28 15:07:56,102 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 29 [2020-10-28 15:07:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:56,102 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2020-10-28 15:07:56,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:07:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2020-10-28 15:07:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:56,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:56,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:56,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:07:56,103 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1707206577, now seen corresponding path program 7 times [2020-10-28 15:07:56,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:56,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632058356] [2020-10-28 15:07:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:56,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:56,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:57,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1301 [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:07:57,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:57,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:57,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:57,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:57,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:57,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:57,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:57,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:07:57,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632058356] [2020-10-28 15:07:57,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:57,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:07:57,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131541568] [2020-10-28 15:07:57,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:07:57,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:57,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:07:57,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:07:57,534 INFO L87 Difference]: Start difference. First operand 137 states and 182 transitions. Second operand 7 states. [2020-10-28 15:07:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:58,162 INFO L93 Difference]: Finished difference Result 177 states and 245 transitions. [2020-10-28 15:07:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:07:58,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-28 15:07:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:58,165 INFO L225 Difference]: With dead ends: 177 [2020-10-28 15:07:58,165 INFO L226 Difference]: Without dead ends: 163 [2020-10-28 15:07:58,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:07:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-28 15:07:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2020-10-28 15:07:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-28 15:07:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 218 transitions. [2020-10-28 15:07:58,182 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 218 transitions. Word has length 29 [2020-10-28 15:07:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:58,183 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 218 transitions. [2020-10-28 15:07:58,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:07:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 218 transitions. [2020-10-28 15:07:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:07:58,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:58,184 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:58,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:07:58,184 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:58,184 INFO L82 PathProgramCache]: Analyzing trace with hash 370649775, now seen corresponding path program 5 times [2020-10-28 15:07:58,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:58,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027573752] [2020-10-28 15:07:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:58,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:59,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:07:59,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:07:59,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-28 15:07:59,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:59,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:07:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:07:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:07:59,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:59,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:59,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:59,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:59,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:59,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:59,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:59,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:59,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:59,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:59,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 15:07:59,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027573752] [2020-10-28 15:07:59,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:59,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:07:59,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780955486] [2020-10-28 15:07:59,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:07:59,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:59,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:07:59,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:07:59,657 INFO L87 Difference]: Start difference. First operand 158 states and 218 transitions. Second operand 8 states. [2020-10-28 15:08:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:01,748 INFO L93 Difference]: Finished difference Result 255 states and 357 transitions. [2020-10-28 15:08:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:08:01,749 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 15:08:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:01,751 INFO L225 Difference]: With dead ends: 255 [2020-10-28 15:08:01,751 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 15:08:01,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:08:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 15:08:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 160. [2020-10-28 15:08:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-28 15:08:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 220 transitions. [2020-10-28 15:08:01,770 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 220 transitions. Word has length 29 [2020-10-28 15:08:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:01,771 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 220 transitions. [2020-10-28 15:08:01,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:08:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 220 transitions. [2020-10-28 15:08:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:08:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:01,772 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:01,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:08:01,772 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:01,775 INFO L82 PathProgramCache]: Analyzing trace with hash 866861182, now seen corresponding path program 6 times [2020-10-28 15:08:01,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:01,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109070626] [2020-10-28 15:08:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:01,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:02,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:02,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:06,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:06,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:08:06,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:06,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:08:06,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:06,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:08:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:08:06,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:08:06,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:06,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:06,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:06,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:06,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:07,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:07,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:07,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:07,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:07,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:08:07,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109070626] [2020-10-28 15:08:07,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:07,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:08:07,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311543612] [2020-10-28 15:08:07,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:08:07,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:07,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:08:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:08:07,017 INFO L87 Difference]: Start difference. First operand 160 states and 220 transitions. Second operand 11 states. [2020-10-28 15:08:07,205 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-28 15:08:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:09,350 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2020-10-28 15:08:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:08:09,351 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 15:08:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:09,357 INFO L225 Difference]: With dead ends: 221 [2020-10-28 15:08:09,358 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 15:08:09,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:08:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 15:08:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2020-10-28 15:08:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 15:08:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 189 transitions. [2020-10-28 15:08:09,384 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 189 transitions. Word has length 29 [2020-10-28 15:08:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:09,384 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 189 transitions. [2020-10-28 15:08:09,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:08:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 189 transitions. [2020-10-28 15:08:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:08:09,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:09,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:09,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:08:09,385 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash -147012769, now seen corresponding path program 6 times [2020-10-28 15:08:09,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:09,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761077956] [2020-10-28 15:08:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:09,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:09,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:10,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:08:10,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:10,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-28 15:08:10,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:10,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:08:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:10,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:10,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:10,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:10,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:10,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:10,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:10,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:10,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:10,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:10,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:08:10,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761077956] [2020-10-28 15:08:10,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:10,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:10,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918331918] [2020-10-28 15:08:10,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:10,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:10,872 INFO L87 Difference]: Start difference. First operand 139 states and 189 transitions. Second operand 10 states. [2020-10-28 15:08:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:11,652 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2020-10-28 15:08:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:08:11,653 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 15:08:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:11,654 INFO L225 Difference]: With dead ends: 157 [2020-10-28 15:08:11,654 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 15:08:11,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:08:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 15:08:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-28 15:08:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 15:08:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 194 transitions. [2020-10-28 15:08:11,670 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 194 transitions. Word has length 29 [2020-10-28 15:08:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:11,670 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 194 transitions. [2020-10-28 15:08:11,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 194 transitions. [2020-10-28 15:08:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:11,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:11,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:11,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:08:11,672 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:11,672 INFO L82 PathProgramCache]: Analyzing trace with hash 352910074, now seen corresponding path program 8 times [2020-10-28 15:08:11,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:11,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27277550] [2020-10-28 15:08:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:11,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:12,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:12,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:12,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-28 15:08:12,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:12,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:12,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:08:12,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:08:12,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:08:12,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:12,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:12,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:12,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:12,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:12,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:12,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:12,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:12,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:12,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:08:12,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27277550] [2020-10-28 15:08:12,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:12,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:08:12,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542819469] [2020-10-28 15:08:12,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:08:12,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:08:12,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:08:12,209 INFO L87 Difference]: Start difference. First operand 143 states and 194 transitions. Second operand 8 states. [2020-10-28 15:08:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:12,697 INFO L93 Difference]: Finished difference Result 198 states and 271 transitions. [2020-10-28 15:08:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:08:12,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-28 15:08:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:12,699 INFO L225 Difference]: With dead ends: 198 [2020-10-28 15:08:12,699 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 15:08:12,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 15:08:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2020-10-28 15:08:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 15:08:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 191 transitions. [2020-10-28 15:08:12,717 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 191 transitions. Word has length 30 [2020-10-28 15:08:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:12,717 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 191 transitions. [2020-10-28 15:08:12,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:08:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 191 transitions. [2020-10-28 15:08:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:12,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:12,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:12,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:08:12,718 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash -158168132, now seen corresponding path program 9 times [2020-10-28 15:08:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:12,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103808888] [2020-10-28 15:08:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:12,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:13,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:13,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:14,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:14,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-28 15:08:14,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:14,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:08:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:08:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:08:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:14,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:14,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:14,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:14,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:14,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:14,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:14,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:14,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:14,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:14,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:14,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:08:14,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103808888] [2020-10-28 15:08:14,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:14,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:08:14,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703665047] [2020-10-28 15:08:14,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:08:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:08:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:08:14,157 INFO L87 Difference]: Start difference. First operand 142 states and 191 transitions. Second operand 5 states. [2020-10-28 15:08:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:14,365 INFO L93 Difference]: Finished difference Result 153 states and 203 transitions. [2020-10-28 15:08:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:08:14,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-28 15:08:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:14,367 INFO L225 Difference]: With dead ends: 153 [2020-10-28 15:08:14,367 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 15:08:14,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 15:08:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-28 15:08:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 15:08:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2020-10-28 15:08:14,384 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 30 [2020-10-28 15:08:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:14,384 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2020-10-28 15:08:14,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:08:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2020-10-28 15:08:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:14,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:14,385 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:14,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:08:14,385 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -216956661, now seen corresponding path program 7 times [2020-10-28 15:08:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:14,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46074306] [2020-10-28 15:08:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:14,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:15,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1999 [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:16,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:08:16,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:08:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:16,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:16,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:16,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:16,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:16,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:16,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:16,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:16,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 15:08:16,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46074306] [2020-10-28 15:08:16,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:16,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:16,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629722319] [2020-10-28 15:08:16,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:16,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:16,561 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand 9 states. [2020-10-28 15:08:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:17,310 INFO L93 Difference]: Finished difference Result 216 states and 312 transitions. [2020-10-28 15:08:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:08:17,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-28 15:08:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:17,313 INFO L225 Difference]: With dead ends: 216 [2020-10-28 15:08:17,313 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 15:08:17,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 15:08:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2020-10-28 15:08:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 15:08:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 222 transitions. [2020-10-28 15:08:17,328 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 222 transitions. Word has length 30 [2020-10-28 15:08:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:17,328 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 222 transitions. [2020-10-28 15:08:17,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 222 transitions. [2020-10-28 15:08:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:08:17,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:17,329 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:17,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:08:17,330 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash -433179942, now seen corresponding path program 2 times [2020-10-28 15:08:17,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:17,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586520886] [2020-10-28 15:08:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:17,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:17,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:18,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:18,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:08:18,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:08:18,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-10-28 15:08:18,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:18,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:18,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:08:18,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:08:18,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:08:18,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:18,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:18,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:18,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:18,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:08:18,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586520886] [2020-10-28 15:08:18,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:18,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:08:18,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813393696] [2020-10-28 15:08:18,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:08:18,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:18,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:08:18,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:08:18,785 INFO L87 Difference]: Start difference. First operand 170 states and 222 transitions. Second operand 6 states. [2020-10-28 15:08:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:19,181 INFO L93 Difference]: Finished difference Result 184 states and 240 transitions. [2020-10-28 15:08:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:08:19,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-28 15:08:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:19,183 INFO L225 Difference]: With dead ends: 184 [2020-10-28 15:08:19,183 INFO L226 Difference]: Without dead ends: 178 [2020-10-28 15:08:19,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-28 15:08:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2020-10-28 15:08:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 15:08:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2020-10-28 15:08:19,198 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 30 [2020-10-28 15:08:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:19,199 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2020-10-28 15:08:19,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:08:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2020-10-28 15:08:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:19,200 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:19,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:08:19,200 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1909749983, now seen corresponding path program 8 times [2020-10-28 15:08:19,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:19,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98654653] [2020-10-28 15:08:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:19,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:19,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2326 [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:21,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:08:21,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:08:21,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:21,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:21,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:21,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:21,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:21,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:08:21,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:21,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:21,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:21,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:21,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:21,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:08:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 15:08:21,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98654653] [2020-10-28 15:08:21,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:21,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:21,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254594433] [2020-10-28 15:08:21,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:21,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:21,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:21,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:21,780 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand 10 states. [2020-10-28 15:08:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:22,569 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2020-10-28 15:08:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:22,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-28 15:08:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:22,571 INFO L225 Difference]: With dead ends: 232 [2020-10-28 15:08:22,572 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 15:08:22,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:08:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 15:08:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2020-10-28 15:08:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-28 15:08:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 246 transitions. [2020-10-28 15:08:22,586 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 246 transitions. Word has length 31 [2020-10-28 15:08:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:22,587 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 246 transitions. [2020-10-28 15:08:22,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 246 transitions. [2020-10-28 15:08:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:08:22,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:22,588 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:22,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:08:22,588 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 525661215, now seen corresponding path program 10 times [2020-10-28 15:08:22,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:22,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960668975] [2020-10-28 15:08:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:22,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:22,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1750 [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:08:24,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:24,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:24,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:24,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:24,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:24,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:24,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:24,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:24,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:08:24,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960668975] [2020-10-28 15:08:24,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:24,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:24,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954312709] [2020-10-28 15:08:24,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:24,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:24,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:24,497 INFO L87 Difference]: Start difference. First operand 189 states and 246 transitions. Second operand 9 states. [2020-10-28 15:08:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:25,167 INFO L93 Difference]: Finished difference Result 401 states and 528 transitions. [2020-10-28 15:08:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:08:25,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 15:08:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:25,170 INFO L225 Difference]: With dead ends: 401 [2020-10-28 15:08:25,170 INFO L226 Difference]: Without dead ends: 285 [2020-10-28 15:08:25,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-28 15:08:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 242. [2020-10-28 15:08:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 15:08:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 311 transitions. [2020-10-28 15:08:25,191 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 311 transitions. Word has length 31 [2020-10-28 15:08:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:25,192 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 311 transitions. [2020-10-28 15:08:25,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 311 transitions. [2020-10-28 15:08:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:08:25,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:25,193 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:25,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:08:25,193 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:25,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1247647333, now seen corresponding path program 11 times [2020-10-28 15:08:25,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:25,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413428360] [2020-10-28 15:08:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:25,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:25,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2363 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:08:27,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:27,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:27,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:27,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:27,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:27,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:27,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:08:27,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:27,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:27,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:27,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:27,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:08:27,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413428360] [2020-10-28 15:08:27,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:27,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:08:27,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511324607] [2020-10-28 15:08:27,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:08:27,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:27,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:08:27,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:08:27,676 INFO L87 Difference]: Start difference. First operand 242 states and 311 transitions. Second operand 6 states. [2020-10-28 15:08:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:28,119 INFO L93 Difference]: Finished difference Result 257 states and 328 transitions. [2020-10-28 15:08:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:08:28,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-28 15:08:28,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:28,121 INFO L225 Difference]: With dead ends: 257 [2020-10-28 15:08:28,121 INFO L226 Difference]: Without dead ends: 251 [2020-10-28 15:08:28,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:08:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-28 15:08:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2020-10-28 15:08:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 15:08:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 309 transitions. [2020-10-28 15:08:28,138 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 309 transitions. Word has length 32 [2020-10-28 15:08:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:28,138 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 309 transitions. [2020-10-28 15:08:28,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:08:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 309 transitions. [2020-10-28 15:08:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:08:28,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:28,139 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:28,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:08:28,140 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:28,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1374202401, now seen corresponding path program 12 times [2020-10-28 15:08:28,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:28,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729668847] [2020-10-28 15:08:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:28,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:08:28,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:29,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:29,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:29,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:29,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:08:29,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729668847] [2020-10-28 15:08:29,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:29,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:08:29,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854921865] [2020-10-28 15:08:29,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:08:29,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:29,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:08:29,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:08:29,047 INFO L87 Difference]: Start difference. First operand 241 states and 309 transitions. Second operand 10 states. [2020-10-28 15:08:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:29,852 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2020-10-28 15:08:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:08:29,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-28 15:08:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:29,855 INFO L225 Difference]: With dead ends: 269 [2020-10-28 15:08:29,855 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 15:08:29,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:08:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 15:08:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2020-10-28 15:08:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-28 15:08:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 303 transitions. [2020-10-28 15:08:29,873 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 303 transitions. Word has length 33 [2020-10-28 15:08:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:29,873 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 303 transitions. [2020-10-28 15:08:29,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:08:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 303 transitions. [2020-10-28 15:08:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:08:29,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:29,874 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:29,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:08:29,875 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash -19810929, now seen corresponding path program 9 times [2020-10-28 15:08:29,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:29,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294111643] [2020-10-28 15:08:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:29,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:29,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:08:33,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:33,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3596 [2020-10-28 15:08:33,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:08:33,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:08:33,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:08:33,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:33,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 15:08:33,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294111643] [2020-10-28 15:08:33,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:33,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:08:33,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328062480] [2020-10-28 15:08:33,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:08:33,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:33,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:08:33,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:08:33,591 INFO L87 Difference]: Start difference. First operand 236 states and 303 transitions. Second operand 7 states. [2020-10-28 15:08:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:33,979 INFO L93 Difference]: Finished difference Result 256 states and 324 transitions. [2020-10-28 15:08:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:08:33,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-28 15:08:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:33,981 INFO L225 Difference]: With dead ends: 256 [2020-10-28 15:08:33,981 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 15:08:33,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:08:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 15:08:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-10-28 15:08:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 15:08:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 282 transitions. [2020-10-28 15:08:33,999 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 282 transitions. Word has length 33 [2020-10-28 15:08:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:33,999 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 282 transitions. [2020-10-28 15:08:34,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:08:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 282 transitions. [2020-10-28 15:08:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:08:34,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:34,000 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:34,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:08:34,001 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -539346854, now seen corresponding path program 7 times [2020-10-28 15:08:34,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:34,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353266835] [2020-10-28 15:08:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:34,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:08:34,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:34,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:34,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:34,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:34,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:34,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:34,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:34,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:34,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:34,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:34,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:08:34,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353266835] [2020-10-28 15:08:34,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:34,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:08:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303599944] [2020-10-28 15:08:34,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:08:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:08:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:08:34,525 INFO L87 Difference]: Start difference. First operand 220 states and 282 transitions. Second operand 9 states. [2020-10-28 15:08:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:36,067 INFO L93 Difference]: Finished difference Result 389 states and 499 transitions. [2020-10-28 15:08:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:08:36,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 15:08:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:36,069 INFO L225 Difference]: With dead ends: 389 [2020-10-28 15:08:36,070 INFO L226 Difference]: Without dead ends: 363 [2020-10-28 15:08:36,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:08:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-28 15:08:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 245. [2020-10-28 15:08:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-28 15:08:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 313 transitions. [2020-10-28 15:08:36,093 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 313 transitions. Word has length 34 [2020-10-28 15:08:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:36,094 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 313 transitions. [2020-10-28 15:08:36,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:08:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 313 transitions. [2020-10-28 15:08:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:08:36,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:36,095 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:36,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:08:36,095 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:36,095 INFO L82 PathProgramCache]: Analyzing trace with hash 993797087, now seen corresponding path program 8 times [2020-10-28 15:08:36,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:36,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56338934] [2020-10-28 15:08:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:36,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:39,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:39,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:08:39,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:08:39,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3238 [2020-10-28 15:08:39,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:39,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:08:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:08:39,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:08:39,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:39,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:39,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:08:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56338934] [2020-10-28 15:08:39,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:39,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:39,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612360652] [2020-10-28 15:08:39,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:39,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:39,619 INFO L87 Difference]: Start difference. First operand 245 states and 313 transitions. Second operand 13 states. [2020-10-28 15:08:40,651 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 15:08:41,374 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 15:08:42,163 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 15:08:42,909 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 15:08:45,142 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-28 15:08:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:45,862 INFO L93 Difference]: Finished difference Result 346 states and 439 transitions. [2020-10-28 15:08:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:08:45,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 15:08:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:45,865 INFO L225 Difference]: With dead ends: 346 [2020-10-28 15:08:45,865 INFO L226 Difference]: Without dead ends: 252 [2020-10-28 15:08:45,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:08:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-28 15:08:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 239. [2020-10-28 15:08:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-28 15:08:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 311 transitions. [2020-10-28 15:08:45,887 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 311 transitions. Word has length 35 [2020-10-28 15:08:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:45,888 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 311 transitions. [2020-10-28 15:08:45,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 311 transitions. [2020-10-28 15:08:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:08:45,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:45,889 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:45,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:08:45,889 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:45,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1121510848, now seen corresponding path program 3 times [2020-10-28 15:08:45,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:45,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565619367] [2020-10-28 15:08:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:45,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:49,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3823 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:08:49,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:49,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:49,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:49,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:49,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:49,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:49,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:49,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:49,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:49,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:49,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 15:08:49,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565619367] [2020-10-28 15:08:49,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:49,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:08:49,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108981617] [2020-10-28 15:08:49,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:08:49,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:08:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:08:49,864 INFO L87 Difference]: Start difference. First operand 239 states and 311 transitions. Second operand 8 states. [2020-10-28 15:08:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:54,863 INFO L93 Difference]: Finished difference Result 259 states and 336 transitions. [2020-10-28 15:08:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:08:54,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-28 15:08:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:54,865 INFO L225 Difference]: With dead ends: 259 [2020-10-28 15:08:54,865 INFO L226 Difference]: Without dead ends: 253 [2020-10-28 15:08:54,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:08:54,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-28 15:08:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2020-10-28 15:08:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-28 15:08:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 303 transitions. [2020-10-28 15:08:54,895 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 303 transitions. Word has length 35 [2020-10-28 15:08:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:54,895 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 303 transitions. [2020-10-28 15:08:54,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:08:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 303 transitions. [2020-10-28 15:08:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:08:54,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:54,898 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:54,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:08:54,898 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1910758993, now seen corresponding path program 9 times [2020-10-28 15:08:54,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:54,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600489968] [2020-10-28 15:08:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:54,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:55,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:58,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:59,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:59,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:08:59,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:08:59,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:08:59,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:59,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:59,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:08:59,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:59,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:08:59,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:00,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:00,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:00,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:00,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:00,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:00,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:00,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:00,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:00,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:09:00,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600489968] [2020-10-28 15:09:00,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:00,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:09:00,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612622134] [2020-10-28 15:09:00,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:09:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:09:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:00,084 INFO L87 Difference]: Start difference. First operand 236 states and 303 transitions. Second operand 9 states. [2020-10-28 15:09:00,588 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:09:00,734 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:09:01,516 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 15:09:04,116 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 15:09:10,723 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 57 [2020-10-28 15:09:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:11,621 INFO L93 Difference]: Finished difference Result 441 states and 578 transitions. [2020-10-28 15:09:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:09:11,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-28 15:09:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:11,624 INFO L225 Difference]: With dead ends: 441 [2020-10-28 15:09:11,625 INFO L226 Difference]: Without dead ends: 426 [2020-10-28 15:09:11,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:09:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-28 15:09:11,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 248. [2020-10-28 15:09:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-28 15:09:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 319 transitions. [2020-10-28 15:09:11,651 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 319 transitions. Word has length 35 [2020-10-28 15:09:11,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:11,651 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 319 transitions. [2020-10-28 15:09:11,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:09:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 319 transitions. [2020-10-28 15:09:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:11,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:11,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:11,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:09:11,653 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1759054375, now seen corresponding path program 13 times [2020-10-28 15:09:11,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:11,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455323809] [2020-10-28 15:09:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:12,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:12,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:09:12,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:12,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:12,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:12,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:12,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:12,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:12,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 15:09:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455323809] [2020-10-28 15:09:12,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:12,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:09:12,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493741278] [2020-10-28 15:09:12,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:09:12,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:12,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:09:12,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:12,414 INFO L87 Difference]: Start difference. First operand 248 states and 319 transitions. Second operand 9 states. [2020-10-28 15:09:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:13,110 INFO L93 Difference]: Finished difference Result 353 states and 453 transitions. [2020-10-28 15:09:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:09:13,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-28 15:09:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:13,112 INFO L225 Difference]: With dead ends: 353 [2020-10-28 15:09:13,112 INFO L226 Difference]: Without dead ends: 289 [2020-10-28 15:09:13,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:09:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-28 15:09:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 238. [2020-10-28 15:09:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 15:09:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 306 transitions. [2020-10-28 15:09:13,133 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 306 transitions. Word has length 36 [2020-10-28 15:09:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:13,133 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 306 transitions. [2020-10-28 15:09:13,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:09:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 306 transitions. [2020-10-28 15:09:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:13,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:13,134 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:13,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:09:13,135 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1400883803, now seen corresponding path program 14 times [2020-10-28 15:09:13,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:13,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241004654] [2020-10-28 15:09:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:13,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:13,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:14,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:14,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:17,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:17,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:17,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:17,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4798 [2020-10-28 15:09:17,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:17,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:17,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:09:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:18,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:18,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:18,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:18,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:18,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:18,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:18,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 15:09:18,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241004654] [2020-10-28 15:09:18,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:18,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:18,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801184049] [2020-10-28 15:09:18,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:18,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:18,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:18,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:18,139 INFO L87 Difference]: Start difference. First operand 238 states and 306 transitions. Second operand 10 states. [2020-10-28 15:09:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:19,069 INFO L93 Difference]: Finished difference Result 487 states and 637 transitions. [2020-10-28 15:09:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:19,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-28 15:09:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:19,073 INFO L225 Difference]: With dead ends: 487 [2020-10-28 15:09:19,073 INFO L226 Difference]: Without dead ends: 369 [2020-10-28 15:09:19,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-28 15:09:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 306. [2020-10-28 15:09:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-28 15:09:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 388 transitions. [2020-10-28 15:09:19,107 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 388 transitions. Word has length 36 [2020-10-28 15:09:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:19,110 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 388 transitions. [2020-10-28 15:09:19,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 388 transitions. [2020-10-28 15:09:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:09:19,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:19,116 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:19,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:09:19,116 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 535585375, now seen corresponding path program 15 times [2020-10-28 15:09:19,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:19,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688752230] [2020-10-28 15:09:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:19,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:19,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:19,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:24,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:09:24,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:09:24,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 15:09:24,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:24,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:09:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:09:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:09:24,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:24,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:24,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:24,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:24,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:24,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:24,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:24,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:24,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:24,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:24,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-28 15:09:24,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688752230] [2020-10-28 15:09:24,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:24,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:09:24,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499058498] [2020-10-28 15:09:24,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:09:24,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:09:24,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:24,337 INFO L87 Difference]: Start difference. First operand 306 states and 388 transitions. Second operand 7 states. [2020-10-28 15:09:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:24,835 INFO L93 Difference]: Finished difference Result 325 states and 408 transitions. [2020-10-28 15:09:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:09:24,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-28 15:09:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:24,838 INFO L225 Difference]: With dead ends: 325 [2020-10-28 15:09:24,838 INFO L226 Difference]: Without dead ends: 307 [2020-10-28 15:09:24,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-28 15:09:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 292. [2020-10-28 15:09:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-28 15:09:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 372 transitions. [2020-10-28 15:09:24,865 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 372 transitions. Word has length 37 [2020-10-28 15:09:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:24,865 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 372 transitions. [2020-10-28 15:09:24,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:09:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 372 transitions. [2020-10-28 15:09:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:09:24,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:24,866 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:24,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:09:24,867 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:24,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1442113680, now seen corresponding path program 16 times [2020-10-28 15:09:24,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:24,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247518689] [2020-10-28 15:09:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:24,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:26,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:26,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:29,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:09:29,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:09:29,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:29,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 15:09:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:09:29,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:30,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:30,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:30,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:30,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:30,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:30,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:30,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:30,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:30,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:30,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:30,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247518689] [2020-10-28 15:09:30,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:30,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:30,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522171000] [2020-10-28 15:09:30,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:30,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:30,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:30,108 INFO L87 Difference]: Start difference. First operand 292 states and 372 transitions. Second operand 11 states. [2020-10-28 15:09:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:30,945 INFO L93 Difference]: Finished difference Result 376 states and 507 transitions. [2020-10-28 15:09:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:30,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 15:09:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:30,949 INFO L225 Difference]: With dead ends: 376 [2020-10-28 15:09:30,949 INFO L226 Difference]: Without dead ends: 348 [2020-10-28 15:09:30,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-28 15:09:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 317. [2020-10-28 15:09:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-28 15:09:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 407 transitions. [2020-10-28 15:09:30,974 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 407 transitions. Word has length 37 [2020-10-28 15:09:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:30,975 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 407 transitions. [2020-10-28 15:09:30,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 407 transitions. [2020-10-28 15:09:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:09:30,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:30,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:30,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:09:30,976 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2101278106, now seen corresponding path program 17 times [2020-10-28 15:09:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:30,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271595062] [2020-10-28 15:09:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:31,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:31,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:31,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:09:31,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:31,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-28 15:09:31,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:31,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:09:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:09:31,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:31,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:31,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:31,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:31,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:31,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:31,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:31,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:31,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:31,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:09:31,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271595062] [2020-10-28 15:09:31,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:31,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:09:31,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137656125] [2020-10-28 15:09:31,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:09:31,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:09:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:09:31,757 INFO L87 Difference]: Start difference. First operand 317 states and 407 transitions. Second operand 8 states. [2020-10-28 15:09:32,100 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-28 15:09:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:33,733 INFO L93 Difference]: Finished difference Result 484 states and 610 transitions. [2020-10-28 15:09:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:09:33,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-28 15:09:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:33,737 INFO L225 Difference]: With dead ends: 484 [2020-10-28 15:09:33,737 INFO L226 Difference]: Without dead ends: 463 [2020-10-28 15:09:33,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:09:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-10-28 15:09:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 322. [2020-10-28 15:09:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-28 15:09:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 410 transitions. [2020-10-28 15:09:33,764 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 410 transitions. Word has length 38 [2020-10-28 15:09:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:33,765 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 410 transitions. [2020-10-28 15:09:33,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:09:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 410 transitions. [2020-10-28 15:09:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:09:33,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:33,766 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:33,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:09:33,766 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash -211308582, now seen corresponding path program 18 times [2020-10-28 15:09:33,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:33,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7427219] [2020-10-28 15:09:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:33,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:33,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:33,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:38,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:09:38,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:09:38,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 15:09:38,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:38,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:38,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:09:38,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 15:09:38,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:09:38,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:39,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:39,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:39,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:39,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:39,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:39,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:39,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:39,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:39,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:39,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:39,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7427219] [2020-10-28 15:09:39,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:39,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:09:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850988788] [2020-10-28 15:09:39,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:09:39,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:09:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:39,068 INFO L87 Difference]: Start difference. First operand 322 states and 410 transitions. Second operand 12 states. [2020-10-28 15:09:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:40,070 INFO L93 Difference]: Finished difference Result 412 states and 556 transitions. [2020-10-28 15:09:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:09:40,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-28 15:09:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:40,074 INFO L225 Difference]: With dead ends: 412 [2020-10-28 15:09:40,074 INFO L226 Difference]: Without dead ends: 384 [2020-10-28 15:09:40,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:09:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-28 15:09:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 348. [2020-10-28 15:09:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-28 15:09:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 446 transitions. [2020-10-28 15:09:40,099 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 446 transitions. Word has length 38 [2020-10-28 15:09:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:40,100 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 446 transitions. [2020-10-28 15:09:40,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:09:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 446 transitions. [2020-10-28 15:09:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:09:40,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:40,101 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:40,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:09:40,101 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:40,102 INFO L82 PathProgramCache]: Analyzing trace with hash -930518564, now seen corresponding path program 19 times [2020-10-28 15:09:40,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:40,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958201885] [2020-10-28 15:09:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:40,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:09:45,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:45,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:45,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:45,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:45,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:09:45,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958201885] [2020-10-28 15:09:45,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:45,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:45,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529006205] [2020-10-28 15:09:45,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:45,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:45,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:45,320 INFO L87 Difference]: Start difference. First operand 348 states and 446 transitions. Second operand 11 states. [2020-10-28 15:09:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:46,337 INFO L93 Difference]: Finished difference Result 681 states and 880 transitions. [2020-10-28 15:09:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:46,337 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-28 15:09:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:46,340 INFO L225 Difference]: With dead ends: 681 [2020-10-28 15:09:46,340 INFO L226 Difference]: Without dead ends: 503 [2020-10-28 15:09:46,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-10-28 15:09:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 422. [2020-10-28 15:09:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-10-28 15:09:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 536 transitions. [2020-10-28 15:09:46,373 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 536 transitions. Word has length 38 [2020-10-28 15:09:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:46,373 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 536 transitions. [2020-10-28 15:09:46,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 536 transitions. [2020-10-28 15:09:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:09:46,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:46,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:46,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:09:46,375 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1104640286, now seen corresponding path program 20 times [2020-10-28 15:09:46,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:46,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7722773] [2020-10-28 15:09:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:46,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:09:48,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:48,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:48,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:48,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:48,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:48,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:48,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:48,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:48,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:09:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7722773] [2020-10-28 15:09:48,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:48,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:09:48,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038710176] [2020-10-28 15:09:48,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:09:48,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:09:48,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:48,497 INFO L87 Difference]: Start difference. First operand 422 states and 536 transitions. Second operand 12 states. [2020-10-28 15:09:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:49,673 INFO L93 Difference]: Finished difference Result 483 states and 596 transitions. [2020-10-28 15:09:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:09:49,674 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-28 15:09:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:49,677 INFO L225 Difference]: With dead ends: 483 [2020-10-28 15:09:49,677 INFO L226 Difference]: Without dead ends: 459 [2020-10-28 15:09:49,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:09:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-28 15:09:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 416. [2020-10-28 15:09:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-28 15:09:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 529 transitions. [2020-10-28 15:09:49,711 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 529 transitions. Word has length 39 [2020-10-28 15:09:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:49,711 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 529 transitions. [2020-10-28 15:09:49,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:09:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 529 transitions. [2020-10-28 15:09:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:09:49,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:49,713 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:49,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:09:49,713 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash -456903458, now seen corresponding path program 10 times [2020-10-28 15:09:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:49,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59104180] [2020-10-28 15:09:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:49,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:49,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:50,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:54,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:54,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:09:54,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:09:54,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 15:09:54,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:54,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:09:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:09:54,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:54,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:54,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:54,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:54,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:54,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:54,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:54,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:54,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:54,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:54,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:54,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 15:09:54,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59104180] [2020-10-28 15:09:54,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:54,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:54,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431257800] [2020-10-28 15:09:54,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:54,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:54,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:54,920 INFO L87 Difference]: Start difference. First operand 416 states and 529 transitions. Second operand 10 states. [2020-10-28 15:09:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:55,985 INFO L93 Difference]: Finished difference Result 823 states and 1061 transitions. [2020-10-28 15:09:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:55,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-28 15:09:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:55,989 INFO L225 Difference]: With dead ends: 823 [2020-10-28 15:09:55,989 INFO L226 Difference]: Without dead ends: 683 [2020-10-28 15:09:55,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-10-28 15:09:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 470. [2020-10-28 15:09:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-28 15:09:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 584 transitions. [2020-10-28 15:09:56,024 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 584 transitions. Word has length 39 [2020-10-28 15:09:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:56,024 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 584 transitions. [2020-10-28 15:09:56,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 584 transitions. [2020-10-28 15:09:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:09:56,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:56,026 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:56,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:09:56,026 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:56,026 INFO L82 PathProgramCache]: Analyzing trace with hash 741347552, now seen corresponding path program 21 times [2020-10-28 15:09:56,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:56,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990218003] [2020-10-28 15:09:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:56,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:56,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:56,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:56,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:56,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:01,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:10:01,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:01,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:01,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:01,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:01,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:01,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:01,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:01,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:01,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:01,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:01,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-28 15:10:01,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990218003] [2020-10-28 15:10:01,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:01,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:10:01,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569444694] [2020-10-28 15:10:01,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:10:01,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:01,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:10:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:10:01,160 INFO L87 Difference]: Start difference. First operand 470 states and 584 transitions. Second operand 7 states. [2020-10-28 15:10:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:01,891 INFO L93 Difference]: Finished difference Result 510 states and 627 transitions. [2020-10-28 15:10:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:10:01,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-28 15:10:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:01,895 INFO L225 Difference]: With dead ends: 510 [2020-10-28 15:10:01,895 INFO L226 Difference]: Without dead ends: 504 [2020-10-28 15:10:01,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:10:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-28 15:10:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 468. [2020-10-28 15:10:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-10-28 15:10:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 581 transitions. [2020-10-28 15:10:01,929 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 581 transitions. Word has length 39 [2020-10-28 15:10:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:01,929 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 581 transitions. [2020-10-28 15:10:01,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:10:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 581 transitions. [2020-10-28 15:10:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:10:01,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:01,931 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:01,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:10:01,931 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:01,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1276274779, now seen corresponding path program 11 times [2020-10-28 15:10:01,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:01,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175477512] [2020-10-28 15:10:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:01,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:06,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:06,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:10:06,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:10:06,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:10:06,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:06,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:10:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:10:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:10:06,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:07,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:07,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:07,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:07,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:07,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:07,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:07,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:07,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:07,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 15:10:07,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175477512] [2020-10-28 15:10:07,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:07,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:10:07,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639160416] [2020-10-28 15:10:07,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:10:07,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:10:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:07,315 INFO L87 Difference]: Start difference. First operand 468 states and 581 transitions. Second operand 15 states. [2020-10-28 15:10:07,871 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 15:10:08,353 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 15:10:08,677 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-28 15:10:09,763 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:10:10,370 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:10:10,819 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:10:11,171 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:10:11,861 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:10:12,562 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:10:12,883 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-28 15:10:15,393 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:10:17,528 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= c_main_~y~0 c_main_~z~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~z~0 c_main_~y~0) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0)) is different from false [2020-10-28 15:10:17,880 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-10-28 15:10:20,808 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-28 15:10:23,444 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:10:29,951 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 15:10:30,519 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-28 15:10:35,769 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-28 15:10:40,459 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 15:10:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:40,568 INFO L93 Difference]: Finished difference Result 623 states and 759 transitions. [2020-10-28 15:10:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 15:10:40,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-28 15:10:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:40,571 INFO L225 Difference]: With dead ends: 623 [2020-10-28 15:10:40,571 INFO L226 Difference]: Without dead ends: 482 [2020-10-28 15:10:40,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=561, Invalid=2629, Unknown=6, NotChecked=110, Total=3306 [2020-10-28 15:10:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-10-28 15:10:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 463. [2020-10-28 15:10:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-10-28 15:10:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 571 transitions. [2020-10-28 15:10:40,609 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 571 transitions. Word has length 40 [2020-10-28 15:10:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:40,609 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 571 transitions. [2020-10-28 15:10:40,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:10:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 571 transitions. [2020-10-28 15:10:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:10:40,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:40,611 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:40,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:10:40,611 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -422814164, now seen corresponding path program 22 times [2020-10-28 15:10:40,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:40,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902387622] [2020-10-28 15:10:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:41,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:44,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:45,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:10:45,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:10:45,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 15:10:45,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:45,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:10:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:10:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:10:45,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:45,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:45,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:45,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:45,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:45,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:45,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:45,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:45,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:45,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:45,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:45,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:45,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-28 15:10:45,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902387622] [2020-10-28 15:10:45,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:45,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:10:45,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95025477] [2020-10-28 15:10:45,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:10:45,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:45,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:10:45,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:45,947 INFO L87 Difference]: Start difference. First operand 463 states and 571 transitions. Second operand 13 states. [2020-10-28 15:10:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:47,240 INFO L93 Difference]: Finished difference Result 590 states and 779 transitions. [2020-10-28 15:10:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:10:47,241 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-28 15:10:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:47,243 INFO L225 Difference]: With dead ends: 590 [2020-10-28 15:10:47,243 INFO L226 Difference]: Without dead ends: 549 [2020-10-28 15:10:47,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:10:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-28 15:10:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 500. [2020-10-28 15:10:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-28 15:10:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 620 transitions. [2020-10-28 15:10:47,288 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 620 transitions. Word has length 40 [2020-10-28 15:10:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:47,288 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 620 transitions. [2020-10-28 15:10:47,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:10:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 620 transitions. [2020-10-28 15:10:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:10:47,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:47,290 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:47,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:10:47,290 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:47,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1322205342, now seen corresponding path program 23 times [2020-10-28 15:10:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:47,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486340893] [2020-10-28 15:10:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:47,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:51,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:10:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:52,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:52,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:52,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:52,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:52,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:52,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:52,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 15:10:52,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486340893] [2020-10-28 15:10:52,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:52,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:10:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647284655] [2020-10-28 15:10:52,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:10:52,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:52,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:10:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:10:52,489 INFO L87 Difference]: Start difference. First operand 500 states and 620 transitions. Second operand 9 states. [2020-10-28 15:10:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:53,288 INFO L93 Difference]: Finished difference Result 526 states and 648 transitions. [2020-10-28 15:10:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:10:53,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-28 15:10:53,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:53,292 INFO L225 Difference]: With dead ends: 526 [2020-10-28 15:10:53,292 INFO L226 Difference]: Without dead ends: 470 [2020-10-28 15:10:53,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:10:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-28 15:10:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 467. [2020-10-28 15:10:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-10-28 15:10:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 580 transitions. [2020-10-28 15:10:53,325 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 580 transitions. Word has length 41 [2020-10-28 15:10:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:53,325 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 580 transitions. [2020-10-28 15:10:53,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:10:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 580 transitions. [2020-10-28 15:10:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 15:10:53,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:53,327 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:53,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:10:53,327 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:53,328 INFO L82 PathProgramCache]: Analyzing trace with hash 686596126, now seen corresponding path program 4 times [2020-10-28 15:10:53,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:53,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584222897] [2020-10-28 15:10:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:53,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:10:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:58,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:58,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:58,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 15:10:58,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584222897] [2020-10-28 15:10:58,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:58,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:10:58,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454446965] [2020-10-28 15:10:58,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:10:58,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:58,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:10:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:10:58,490 INFO L87 Difference]: Start difference. First operand 467 states and 580 transitions. Second operand 8 states. [2020-10-28 15:10:58,680 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:10:58,841 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-28 15:10:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:59,673 INFO L93 Difference]: Finished difference Result 498 states and 620 transitions. [2020-10-28 15:10:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:10:59,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 15:10:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:59,676 INFO L225 Difference]: With dead ends: 498 [2020-10-28 15:10:59,676 INFO L226 Difference]: Without dead ends: 492 [2020-10-28 15:10:59,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:10:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-28 15:10:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 466. [2020-10-28 15:10:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-28 15:10:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 575 transitions. [2020-10-28 15:10:59,710 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 575 transitions. Word has length 41 [2020-10-28 15:10:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:59,710 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 575 transitions. [2020-10-28 15:10:59,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:10:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 575 transitions. [2020-10-28 15:10:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:10:59,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:59,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:59,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:10:59,712 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash 941495002, now seen corresponding path program 24 times [2020-10-28 15:10:59,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:59,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636635226] [2020-10-28 15:10:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:11:00,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:11:00,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-28 15:11:00,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:11:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 15:11:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:11:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:00,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:00,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:00,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:00,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:00,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:00,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:00,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:00,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:00,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:00,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:00,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:00,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 15:11:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636635226] [2020-10-28 15:11:00,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:00,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:11:00,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425763883] [2020-10-28 15:11:00,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:11:00,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:11:00,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:11:00,647 INFO L87 Difference]: Start difference. First operand 466 states and 575 transitions. Second operand 10 states. [2020-10-28 15:11:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:01,495 INFO L93 Difference]: Finished difference Result 611 states and 744 transitions. [2020-10-28 15:11:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:11:01,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-28 15:11:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:01,499 INFO L225 Difference]: With dead ends: 611 [2020-10-28 15:11:01,499 INFO L226 Difference]: Without dead ends: 579 [2020-10-28 15:11:01,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:11:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-28 15:11:01,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 460. [2020-10-28 15:11:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-28 15:11:01,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 572 transitions. [2020-10-28 15:11:01,530 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 572 transitions. Word has length 42 [2020-10-28 15:11:01,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:01,530 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 572 transitions. [2020-10-28 15:11:01,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:11:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 572 transitions. [2020-10-28 15:11:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:11:01,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:01,532 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:01,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:11:01,532 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash 878980955, now seen corresponding path program 25 times [2020-10-28 15:11:01,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:01,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110061750] [2020-10-28 15:11:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:03,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:11:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:06,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:06,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:06,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:06,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:06,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:06,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:06,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:06,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 15:11:06,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110061750] [2020-10-28 15:11:06,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:06,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:11:06,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980414485] [2020-10-28 15:11:06,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:11:06,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:06,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:11:06,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:11:06,776 INFO L87 Difference]: Start difference. First operand 460 states and 572 transitions. Second operand 10 states.