/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-tiling/mbpr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:52:26,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:52:26,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:52:26,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:52:26,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:52:26,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:52:26,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:52:26,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:52:26,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:52:26,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:52:26,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:52:26,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:52:26,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:52:26,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:52:26,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:52:26,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:52:26,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:52:26,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:52:26,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:52:26,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:52:26,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:52:26,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:52:26,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:52:27,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:52:27,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:52:27,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:52:27,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:52:27,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:52:27,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:52:27,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:52:27,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:52:27,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:52:27,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:52:27,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:52:27,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:52:27,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:52:27,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:52:27,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:52:27,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:52:27,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:52:27,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:52:27,035 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 [2020-10-26 19:52:27,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:52:27,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:52:27,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:52:27,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:52:27,092 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:52:27,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:52:27,092 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:52:27,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:52:27,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:52:27,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:52:27,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:52:27,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:52:27,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:52:27,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:52:27,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:52:27,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:52:27,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:52:27,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:52:27,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:52:27,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:52:27,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:52:27,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:52:27,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:52:27,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:52:27,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:52:27,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:52:27,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:52:27,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:52:27,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:52:27,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:52:27,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:52:27,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:52:27,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:52:27,629 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:52:27,630 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:52:27,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr5.c [2020-10-26 19:52:27,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cfb4b0414/dbb983488b954d08a330063dadbdbd73/FLAG10216d74a [2020-10-26 19:52:28,355 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:52:28,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr5.c [2020-10-26 19:52:28,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cfb4b0414/dbb983488b954d08a330063dadbdbd73/FLAG10216d74a [2020-10-26 19:52:28,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cfb4b0414/dbb983488b954d08a330063dadbdbd73 [2020-10-26 19:52:28,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:52:28,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:52:28,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:52:28,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:52:28,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:52:28,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:52:28" (1/1) ... [2020-10-26 19:52:28,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb8dd41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:28, skipping insertion in model container [2020-10-26 19:52:28,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:52:28" (1/1) ... [2020-10-26 19:52:28,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:52:28,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:52:29,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:52:29,024 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:52:29,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:52:29,163 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:52:29,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29 WrapperNode [2020-10-26 19:52:29,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:52:29,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:52:29,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:52:29,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:52:29,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (1/1) ... [2020-10-26 19:52:29,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (1/1) ... [2020-10-26 19:52:29,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (1/1) ... [2020-10-26 19:52:29,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (1/1) ... [2020-10-26 19:52:29,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (1/1) ... [2020-10-26 19:52:29,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (1/1) ... [2020-10-26 19:52:29,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (1/1) ... [2020-10-26 19:52:29,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:52:29,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:52:29,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:52:29,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:52:29,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (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 [2020-10-26 19:52:29,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:52:29,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:52:29,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:52:29,353 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:52:29,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:52:29,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:52:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:52:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:52:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:52:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:52:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:52:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:52:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:52:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:52:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:52:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:52:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:52:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:52:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:52:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:52:29,985 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:52:29,985 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 19:52:29,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:52:29 BoogieIcfgContainer [2020-10-26 19:52:29,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:52:29,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:52:29,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:52:29,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:52:29,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:52:28" (1/3) ... [2020-10-26 19:52:29,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a4de74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:52:29, skipping insertion in model container [2020-10-26 19:52:29,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:52:29" (2/3) ... [2020-10-26 19:52:29,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a4de74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:52:29, skipping insertion in model container [2020-10-26 19:52:29,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:52:29" (3/3) ... [2020-10-26 19:52:30,000 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2020-10-26 19:52:30,013 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:52:30,018 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:52:30,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:52:30,064 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:52:30,064 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:52:30,064 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:52:30,064 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:52:30,064 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:52:30,065 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:52:30,065 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:52:30,065 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:52:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-26 19:52:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:52:30,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:30,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:30,093 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1162609913, now seen corresponding path program 1 times [2020-10-26 19:52:30,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:30,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231878686] [2020-10-26 19:52:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:31,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:52:31,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:52:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-26 19:52:31,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-26 19:52:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:31,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:52:31,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:31,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:31,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:31,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:31,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:52:31,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:31,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:31,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:31,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:31,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:52:31,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:52:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:31,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:31,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231878686] [2020-10-26 19:52:31,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:31,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:52:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776253613] [2020-10-26 19:52:31,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:52:31,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:52:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:52:31,323 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2020-10-26 19:52:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:31,560 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2020-10-26 19:52:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:52:31,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-26 19:52:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:31,570 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:52:31,570 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:52:31,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:52:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:52:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-26 19:52:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:52:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-26 19:52:31,622 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 31 [2020-10-26 19:52:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:31,623 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-26 19:52:31,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:52:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-26 19:52:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:52:31,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:31,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:31,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:52:31,626 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:31,627 INFO L82 PathProgramCache]: Analyzing trace with hash -144494776, now seen corresponding path program 1 times [2020-10-26 19:52:31,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:31,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968295693] [2020-10-26 19:52:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:31,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:32,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:33,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:34,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:36,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:52:36,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:52:36,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:52:36,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:36,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:52:36,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:52:36,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:36,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:36,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:36,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:36,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:36,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:36,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:36,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:36,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:36,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:36,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:36,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:52:36,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:52:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:36,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:52:36,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:36,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968295693] [2020-10-26 19:52:36,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:36,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:52:36,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707225001] [2020-10-26 19:52:36,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:52:36,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:36,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:52:36,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:52:36,830 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 8 states. [2020-10-26 19:52:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:37,302 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2020-10-26 19:52:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:52:37,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-26 19:52:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:37,304 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:52:37,304 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:52:37,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:52:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:52:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-26 19:52:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:52:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-26 19:52:37,320 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 31 [2020-10-26 19:52:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:37,321 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-26 19:52:37,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:52:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-26 19:52:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:52:37,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:37,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:37,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:52:37,324 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1001680341, now seen corresponding path program 1 times [2020-10-26 19:52:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:37,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340394642] [2020-10-26 19:52:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:37,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:37,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:52:37,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:52:37,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-26 19:52:37,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:37,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:37,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:37,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:52:37,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:37,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:37,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:37,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:37,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:52:37,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:37,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:37,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:37,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:37,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:37,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:37,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:52:37,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:37,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:37,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:37,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:37,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:52:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:52:37,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340394642] [2020-10-26 19:52:37,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:37,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:52:37,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800090813] [2020-10-26 19:52:37,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:52:37,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:37,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:52:37,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:37,990 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 4 states. [2020-10-26 19:52:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:38,202 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-10-26 19:52:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:52:38,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-26 19:52:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:38,204 INFO L225 Difference]: With dead ends: 79 [2020-10-26 19:52:38,205 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:52:38,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:52:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-26 19:52:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:52:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-26 19:52:38,219 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 51 [2020-10-26 19:52:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:38,219 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-26 19:52:38,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:52:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-26 19:52:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:52:38,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:38,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:38,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:52:38,222 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash 992464365, now seen corresponding path program 1 times [2020-10-26 19:52:38,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:38,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392816115] [2020-10-26 19:52:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:38,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:38,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:52:38,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:52:38,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-26 19:52:38,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:52:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:38,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:38,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:38,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:38,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:38,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:52:38,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:38,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:38,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:38,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:38,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:38,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:38,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:38,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:52:38,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:52:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392816115] [2020-10-26 19:52:38,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:38,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:52:38,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11400836] [2020-10-26 19:52:38,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:52:38,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:52:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:38,755 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 4 states. [2020-10-26 19:52:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:38,931 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2020-10-26 19:52:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:52:38,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-26 19:52:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:38,933 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:52:38,933 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:52:38,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:52:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-26 19:52:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:52:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-26 19:52:38,950 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 51 [2020-10-26 19:52:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:38,952 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-26 19:52:38,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:52:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-26 19:52:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:52:38,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:38,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:38,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:52:38,962 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1250629803, now seen corresponding path program 1 times [2020-10-26 19:52:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:38,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736633750] [2020-10-26 19:52:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:38,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:39,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:52:39,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:39,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-26 19:52:39,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:52:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:52:39,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:52:39,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:39,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:39,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:39,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:39,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:52:39,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:39,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:39,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:39,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:39,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:39,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:39,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:52:39,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:52:39,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736633750] [2020-10-26 19:52:39,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:52:39,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:52:39,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187562058] [2020-10-26 19:52:39,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:52:39,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:52:39,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:39,471 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 4 states. [2020-10-26 19:52:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:39,606 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-26 19:52:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:52:39,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-26 19:52:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:39,607 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:52:39,608 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:52:39,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:52:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:52:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-26 19:52:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:52:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-26 19:52:39,617 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 51 [2020-10-26 19:52:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:39,618 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-26 19:52:39,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:52:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-26 19:52:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:52:39,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:39,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:39,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:52:39,619 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:39,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1644996589, now seen corresponding path program 1 times [2020-10-26 19:52:39,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:39,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242498649] [2020-10-26 19:52:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:39,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:39,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:40,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:40,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:41,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:42,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:43,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:44,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:44,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:52:44,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:52:44,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:52:44,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:52:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:44,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:52:44,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:45,354 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-10-26 19:52:45,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:45,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:45,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:45,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:52:45,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:45,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:45,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:45,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:45,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:52:45,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:52:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:52:45,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:52:46,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242498649] [2020-10-26 19:52:46,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:46,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:52:46,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838857379] [2020-10-26 19:52:46,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:52:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:52:46,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:52:46,071 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 18 states. [2020-10-26 19:52:46,269 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-26 19:52:46,771 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-26 19:52:47,730 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-26 19:52:48,070 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-26 19:52:48,601 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-26 19:52:49,262 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-26 19:52:49,519 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-26 19:52:50,081 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-26 19:52:50,545 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-10-26 19:52:50,704 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-10-26 19:52:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:51,157 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2020-10-26 19:52:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:52:51,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-26 19:52:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:51,162 INFO L225 Difference]: With dead ends: 168 [2020-10-26 19:52:51,162 INFO L226 Difference]: Without dead ends: 156 [2020-10-26 19:52:51,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:52:51,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-26 19:52:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2020-10-26 19:52:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:52:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-10-26 19:52:51,190 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 51 [2020-10-26 19:52:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:51,191 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-10-26 19:52:51,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:52:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-10-26 19:52:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:52:51,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:51,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:51,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:52:51,192 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1766432719, now seen corresponding path program 1 times [2020-10-26 19:52:51,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:51,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509406819] [2020-10-26 19:52:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:51,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:51,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:52,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:52,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:53,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:55,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:55,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:56,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:56,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:52:56,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:52:56,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:52:56,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:52:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:52:56,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,077 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2020-10-26 19:52:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:57,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:57,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:57,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:52:57,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:57,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:57,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:57,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:52:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:57,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:57,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:57,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:52:57,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:52:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:52:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:52:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:57,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:57,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:52:57,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:52:57,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:52:57,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:57,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:52:57,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:52:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509406819] [2020-10-26 19:52:57,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:57,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:52:57,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185853627] [2020-10-26 19:52:57,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:52:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:52:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:52:57,480 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 16 states. [2020-10-26 19:53:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:00,238 INFO L93 Difference]: Finished difference Result 250 states and 307 transitions. [2020-10-26 19:53:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:53:00,239 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-26 19:53:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:00,243 INFO L225 Difference]: With dead ends: 250 [2020-10-26 19:53:00,243 INFO L226 Difference]: Without dead ends: 233 [2020-10-26 19:53:00,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=330, Invalid=1152, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:53:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-26 19:53:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 174. [2020-10-26 19:53:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:53:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 211 transitions. [2020-10-26 19:53:00,281 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 211 transitions. Word has length 60 [2020-10-26 19:53:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:00,281 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 211 transitions. [2020-10-26 19:53:00,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:53:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 211 transitions. [2020-10-26 19:53:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:53:00,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:00,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:00,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:53:00,285 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash -78934447, now seen corresponding path program 1 times [2020-10-26 19:53:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:00,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934669] [2020-10-26 19:53:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:00,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:00,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:01,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:01,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:02,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:02,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:03,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:05,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:53:05,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:53:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:53:05,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:53:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:53:05,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:05,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:05,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:05,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:05,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:05,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:05,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:05,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:05,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:05,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:05,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:05,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:05,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:05,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:05,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:05,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:05,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:05,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:05,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:05,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:53:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:05,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:05,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:05,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:05,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:05,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:05,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:05,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:05,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:05,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:53:05,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934669] [2020-10-26 19:53:05,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:53:05,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:53:05,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201580111] [2020-10-26 19:53:05,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:53:05,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:05,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:53:05,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:05,394 INFO L87 Difference]: Start difference. First operand 174 states and 211 transitions. Second operand 4 states. [2020-10-26 19:53:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:05,547 INFO L93 Difference]: Finished difference Result 251 states and 303 transitions. [2020-10-26 19:53:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:53:05,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-26 19:53:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:05,551 INFO L225 Difference]: With dead ends: 251 [2020-10-26 19:53:05,551 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:53:05,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:53:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-26 19:53:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:53:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2020-10-26 19:53:05,574 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 60 [2020-10-26 19:53:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:05,575 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2020-10-26 19:53:05,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:53:05,575 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2020-10-26 19:53:05,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:53:05,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:05,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:05,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:53:05,577 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash -181812267, now seen corresponding path program 1 times [2020-10-26 19:53:05,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:05,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517182858] [2020-10-26 19:53:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:05,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:07,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:07,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:10,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:53:10,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:53:10,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:53:10,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:10,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:53:10,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:53:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:53:10,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:10,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:10,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:10,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:10,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:53:10,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:10,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:10,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:10,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:10,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:10,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:10,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:10,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:10,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:10,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:10,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:10,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:10,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:53:10,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517182858] [2020-10-26 19:53:10,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:10,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:53:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769023486] [2020-10-26 19:53:10,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:53:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:53:10,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:53:10,795 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand 8 states. [2020-10-26 19:53:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:11,586 INFO L93 Difference]: Finished difference Result 257 states and 304 transitions. [2020-10-26 19:53:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:53:11,587 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-26 19:53:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:11,590 INFO L225 Difference]: With dead ends: 257 [2020-10-26 19:53:11,590 INFO L226 Difference]: Without dead ends: 160 [2020-10-26 19:53:11,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:53:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-26 19:53:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 127. [2020-10-26 19:53:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:53:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2020-10-26 19:53:11,614 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 67 [2020-10-26 19:53:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:11,615 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2020-10-26 19:53:11,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:53:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2020-10-26 19:53:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:53:11,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:11,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:11,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:53:11,617 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1764650581, now seen corresponding path program 2 times [2020-10-26 19:53:11,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227210252] [2020-10-26 19:53:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:11,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:11,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:12,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:13,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:14,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:15,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:16,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:16,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:53:16,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:53:16,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:53:16,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:16,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:53:16,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:16,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 19:53:16,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:17,313 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2020-10-26 19:53:17,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:17,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:17,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:17,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:17,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:17,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:17,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:17,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:17,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:17,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:17,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:17,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:17,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:53:17,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:17,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:53:17,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:17,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:53:17,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:53:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:17,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:17,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:17,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:17,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:17,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:17,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:17,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:53:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:17,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:17,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:17,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:17,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:17,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:53:17,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227210252] [2020-10-26 19:53:17,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:17,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:53:17,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400580064] [2020-10-26 19:53:17,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:53:17,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:53:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:53:17,870 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand 17 states. [2020-10-26 19:53:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:21,295 INFO L93 Difference]: Finished difference Result 250 states and 297 transitions. [2020-10-26 19:53:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:53:21,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-26 19:53:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:21,298 INFO L225 Difference]: With dead ends: 250 [2020-10-26 19:53:21,298 INFO L226 Difference]: Without dead ends: 233 [2020-10-26 19:53:21,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:53:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-26 19:53:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 170. [2020-10-26 19:53:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-26 19:53:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 193 transitions. [2020-10-26 19:53:21,334 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 193 transitions. Word has length 69 [2020-10-26 19:53:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:21,336 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 193 transitions. [2020-10-26 19:53:21,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:53:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 193 transitions. [2020-10-26 19:53:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:53:21,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:21,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:21,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:53:21,339 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:21,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1516504087, now seen corresponding path program 1 times [2020-10-26 19:53:21,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:21,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734315181] [2020-10-26 19:53:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:21,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:21,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:22,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:23,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:26,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:26,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:53:26,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:53:26,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:53:26,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:53:26,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:53:26,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:26,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:26,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:26,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:26,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:26,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:26,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:26,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:26,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:26,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:26,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:26,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:53:26,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:26,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:53:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:26,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:26,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:26,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:26,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:26,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:26,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:26,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:53:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:26,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:26,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:26,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:26,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:26,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:53:26,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:53:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:26,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 19:53:26,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734315181] [2020-10-26 19:53:26,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:53:26,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:53:26,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680162274] [2020-10-26 19:53:26,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:53:26,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:26,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:53:26,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:26,460 INFO L87 Difference]: Start difference. First operand 170 states and 193 transitions. Second operand 4 states. [2020-10-26 19:53:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:26,693 INFO L93 Difference]: Finished difference Result 245 states and 279 transitions. [2020-10-26 19:53:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:53:26,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-26 19:53:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:26,697 INFO L225 Difference]: With dead ends: 245 [2020-10-26 19:53:26,698 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:53:26,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:53:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:53:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-26 19:53:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:53:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2020-10-26 19:53:26,750 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 69 [2020-10-26 19:53:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:26,752 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2020-10-26 19:53:26,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:53:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2020-10-26 19:53:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:53:26,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:26,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:26,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:53:26,761 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:26,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1536210608, now seen corresponding path program 2 times [2020-10-26 19:53:26,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:26,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077071086] [2020-10-26 19:53:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:26,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:28,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:29,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:30,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:31,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:31,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:53:31,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:53:31,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:53:31,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:53:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:31,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:53:31,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:33,722 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2020-10-26 19:53:33,947 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 26 [2020-10-26 19:53:34,327 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2020-10-26 19:53:34,483 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-10-26 19:53:35,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:35,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:35,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:35,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:35,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:35,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:35,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:35,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:35,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:35,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:35,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:35,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:35,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:35,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:53:35,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077071086] [2020-10-26 19:53:35,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:35,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:53:35,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841081328] [2020-10-26 19:53:35,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:53:35,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:53:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:53:35,815 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand 17 states. [2020-10-26 19:53:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:41,238 INFO L93 Difference]: Finished difference Result 275 states and 317 transitions. [2020-10-26 19:53:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:53:41,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-26 19:53:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:41,242 INFO L225 Difference]: With dead ends: 275 [2020-10-26 19:53:41,242 INFO L226 Difference]: Without dead ends: 258 [2020-10-26 19:53:41,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:53:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-26 19:53:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 181. [2020-10-26 19:53:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-26 19:53:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2020-10-26 19:53:41,297 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 71 [2020-10-26 19:53:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:41,297 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2020-10-26 19:53:41,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:53:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2020-10-26 19:53:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:53:41,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:41,299 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:41,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:53:41,299 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:41,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1010436273, now seen corresponding path program 3 times [2020-10-26 19:53:41,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:41,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188428328] [2020-10-26 19:53:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:41,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:42,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:42,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:46,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:46,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:53:46,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:53:46,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:53:46,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:46,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:53:46,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:46,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:53:46,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:46,867 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 25 [2020-10-26 19:53:46,994 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2020-10-26 19:53:47,194 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-10-26 19:53:47,369 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-26 19:53:47,567 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-10-26 19:53:47,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:47,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:47,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:47,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:47,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:47,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:47,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:47,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:47,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:53:47,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:47,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:47,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:47,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:53:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:47,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:47,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:47,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:53:47,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:47,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:47,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:47,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:53:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:47,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:47,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:47,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:47,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:47,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:47,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:47,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:47,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:53:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:47,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:47,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:47,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:47,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:53:47,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:47,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:47,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:47,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:47,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:53:47,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188428328] [2020-10-26 19:53:47,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:47,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:53:47,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424294054] [2020-10-26 19:53:47,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:53:47,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:47,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:53:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:53:47,823 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand 15 states. [2020-10-26 19:53:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:53:50,626 INFO L93 Difference]: Finished difference Result 257 states and 296 transitions. [2020-10-26 19:53:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:53:50,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-10-26 19:53:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:53:50,630 INFO L225 Difference]: With dead ends: 257 [2020-10-26 19:53:50,631 INFO L226 Difference]: Without dead ends: 240 [2020-10-26 19:53:50,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:53:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-26 19:53:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 187. [2020-10-26 19:53:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-26 19:53:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 213 transitions. [2020-10-26 19:53:50,664 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 213 transitions. Word has length 78 [2020-10-26 19:53:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:53:50,664 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 213 transitions. [2020-10-26 19:53:50,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:53:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 213 transitions. [2020-10-26 19:53:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:53:50,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:53:50,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:53:50,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:53:50,666 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:53:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:53:50,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1443100342, now seen corresponding path program 4 times [2020-10-26 19:53:50,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:53:50,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4736974] [2020-10-26 19:53:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:53:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:50,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:51,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:52,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:53,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:53,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:55,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:55,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:53:55,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:53:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:53:55,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:53:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:53:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:53:55,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:56,276 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2020-10-26 19:53:56,446 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-26 19:53:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:53:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:57,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:57,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:57,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:53:57,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:53:57,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:53:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:57,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:53:57,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:57,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:53:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:57,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:57,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:57,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:53:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:53:57,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:57,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:57,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:57,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:57,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:57,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:53:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:53:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:53:57,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:53:57,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:53:57,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:53:57,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:53:57,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:53:57,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:53:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:53:57,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:53:57,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:53:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:53:57,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4736974] [2020-10-26 19:53:57,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:53:57,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:53:57,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840634583] [2020-10-26 19:53:57,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:53:57,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:53:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:53:57,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:53:57,551 INFO L87 Difference]: Start difference. First operand 187 states and 213 transitions. Second operand 17 states. [2020-10-26 19:53:57,959 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-26 19:53:58,299 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-26 19:53:58,575 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 19:53:59,319 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-26 19:53:59,649 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-26 19:53:59,830 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-26 19:54:00,036 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-26 19:54:00,579 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-26 19:54:01,146 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-26 19:54:01,370 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-26 19:54:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:02,000 INFO L93 Difference]: Finished difference Result 282 states and 330 transitions. [2020-10-26 19:54:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:54:02,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-10-26 19:54:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:02,003 INFO L225 Difference]: With dead ends: 282 [2020-10-26 19:54:02,003 INFO L226 Difference]: Without dead ends: 265 [2020-10-26 19:54:02,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:54:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-26 19:54:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2020-10-26 19:54:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-26 19:54:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 259 transitions. [2020-10-26 19:54:02,040 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 259 transitions. Word has length 80 [2020-10-26 19:54:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:02,040 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 259 transitions. [2020-10-26 19:54:02,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:54:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 259 transitions. [2020-10-26 19:54:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:54:02,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:02,042 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:02,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:54:02,042 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1644145195, now seen corresponding path program 5 times [2020-10-26 19:54:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:02,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178184420] [2020-10-26 19:54:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:02,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:03,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:03,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:03,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:03,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:04,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:07,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:07,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:54:07,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:54:07,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:54:07,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:54:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:54:07,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 19:54:07,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:08,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:54:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:08,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:08,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:54:08,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:54:08,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:54:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:54:08,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:08,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 19:54:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:08,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:08,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:08,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:08,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:54:08,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:54:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:08,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:54:08,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:08,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:54:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:08,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:08,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:08,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:08,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:54:08,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:08,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:08,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:08,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:08,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:08,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:54:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:08,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:08,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:08,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:08,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:08,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:08,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:08,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:54:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:08,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:08,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:08,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:08,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:54:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:08,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:08,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:08,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:54:08,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:54:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:54:08,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:54:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:54:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:54:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:54:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:54:08,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178184420] [2020-10-26 19:54:08,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:54:08,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:54:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201368775] [2020-10-26 19:54:08,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:54:08,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:54:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:54:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:54:08,155 INFO L87 Difference]: Start difference. First operand 225 states and 259 transitions. Second operand 22 states. [2020-10-26 19:54:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:54:12,289 INFO L93 Difference]: Finished difference Result 290 states and 337 transitions. [2020-10-26 19:54:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:54:12,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-10-26 19:54:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:54:12,294 INFO L225 Difference]: With dead ends: 290 [2020-10-26 19:54:12,294 INFO L226 Difference]: Without dead ends: 287 [2020-10-26 19:54:12,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=425, Invalid=2545, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:54:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-26 19:54:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 253. [2020-10-26 19:54:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-26 19:54:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 294 transitions. [2020-10-26 19:54:12,348 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 294 transitions. Word has length 87 [2020-10-26 19:54:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:54:12,349 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 294 transitions. [2020-10-26 19:54:12,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:54:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 294 transitions. [2020-10-26 19:54:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:54:12,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:54:12,350 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:54:12,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:54:12,351 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:54:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:54:12,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1652815610, now seen corresponding path program 3 times [2020-10-26 19:54:12,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:54:12,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736582707] [2020-10-26 19:54:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:54:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:54:12,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:12,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:54:29,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:54:29,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:54:29,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:54:29,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17120 [2020-10-26 19:54:29,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:54:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:54:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 19:54:29,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-26 19:54:29,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0